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缺失inlC2突变株增强单核细胞增多症李斯特菌对上皮细胞的内化作用的研究
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摘要
单核细胞增多症李斯特菌(Listeria monocytogenes, LM)是重要的人畜共患食源性病原菌,广泛存于自然环境和食品加工环境,耐酸、耐盐,低温下可繁殖,能引起人和动物的脑膜炎、败血症和胃肠炎,致死率达20-30%,给人及动物健康带来较大危害。不同来源的单核细胞增多症李斯特菌的毒力差异很大,自上世纪80年代以来李斯特菌的毒力因子一直是人们研究的热点。内化素C2(InlC2)是LM内化素家族中众多内化素的成员之一。它存在于主要的致病性李斯特菌菌株中,为LM所独有,常与iinlD等内化素基因形成基因簇,发挥其功能,近来研究表明,InlC2与InlA一起在李斯特菌病的体液免疫中发挥重要作用。为了解InlC2在单核细胞增多症李斯特菌感染宿主细胞过程中的作用以及与其他重要内化素的关系。我们从以下几个方面对其进行研究。研究结果如下:
     1、采用PCR的方法检测了134株来源不同的单核细胞增多症李斯特菌inlA、inlB、inlC、inlC2、inlD、inlE、inlG内化素的分布以及ascB-dapE内化素岛的内化素的构成情况,结果:除1/2b型的菌株S10不含inlA和inlB,其余都含有inlA和inlB。inlC存在于所有谱系Ⅰ、Ⅱ(121/121)和53.8%(7/13)谱系Ⅲ菌株。inlD存在于所有谱系Ⅰ100%(55/55)、谱系Ⅱ25.7%(17/66)和谱系Ⅲ69.2%(9/13)。inlE存在于所有谱系Ⅰ、Ⅱ(121/121)和谱系Ⅲ30.7%(4/13)。inlG在谱系Ⅰ中不存在(0/55),谱系Ⅱ74.2%(49/66)和谱系Ⅲ30.7%(4/13)。134株中有110株(82.1%)含有inlC2。所有谱系Ⅰ(血清型1/2b和4b)都含有inlC2基因,除一个在inlGC2DE基因群中以外,其余都在inlC2DE中,在谱系Ⅱ中49株血清型1/2a的其中47株菌含有inlC2,在inlC2DE(17/47)或inlGC2DE(30/47)基因群中,16株血清型1/2c中仅有一株含有inlC2基因,存在于inlGC2DE基因群中,谱系Ⅲ中的13株菌其中6株inlC2存在于inlGC2DE(4/6)基因群或别的结构中(2/6),此外,其余5个种无inlC2基因。结果表明:LM特有的内化素基因inlC2出现在所有谱系Ⅰ和大多数血清型1/2a的菌株中。谱系Ⅲ中存在相对较少。inlC2与其他内化素基因inlD、inlE,有时inlG一起在ascB-dapE内化素岛中组成不同的内化素基因簇。使ascB-dapE内化素岛具有较大的多态性,这可作为区分LM谱系/血清型的分子标志。
     2、PCR扩增inlC2基因两端的同源臂,融合后,使用同源重组的方法构建LM标准株681和L10的△inlC2缺失突变株。经氯霉素筛选突变株,旁侧引物扩增和测序方式验证获得△inlC2缺失突变株。
     3、通过LM681和L10与相应△inlC2突变株的生长培养、BALB/c小鼠增殖试验,ICR小鼠毒力试验,致死病理解剖和常规组织染色法,确定△inlC2突变株对LM毒力的影响。结果:亲本株与突变株生长培养结果之间差异不显著。在小鼠体内增殖试验中△inlC2突变株与亲本株之间差异明显,△inlC2突变株在脾脏中的存活数是亲本株的10倍(P<0.01),在肝脏中是亲本株的7倍。ICR小鼠毒力试验LD50差异不显著。组织染色结果显示△inlC2突变株引起的病理变化比亲本株要明显,特别是在脑、脾脏和肝脏。结果表明:inlC2与单核细胞增多症李斯特菌对小鼠的致病能力的大小有关。△inlC2突变株对小鼠的致病力增强了。
     4、通过LM681、Ll0及其△inlC2突变株对Hela细胞的粘附、侵袭和细胞内的增殖试验,确定inlC2基因的缺失是否会影响LM对细胞的感染作用。结果:△inlC2突变株比它们的亲本株的对HeLa细胞的粘附能力增强1.3倍(P<0.05),侵袭力约2.7倍(P<0.01),细胞内增殖是亲本株的1.7倍。这些数据结果表明:inlC2基因的缺失增强了LM对HeLa细胞的内化作用。
     5、分别通过qRT-PCR(?)Iwestern blot评估inlA和inlB的转录和转录后水平,以确定单核细胞增多症李斯特菌△inlC2突变株内化作用的增强是否与inlA和inlB有关。结果:inlA和inlB的转录水平并没有增加,但产量却有很大提高。结果表明:inlC2基因的缺失增加了InlA的产量但没有改变inlA的转录水平,InlB也同样如此。
     6、通过qRT-PCR检测对比人工胃液(pH 2.5)和BHI中单核细胞增多症李斯特菌的inlA, inlB、inlC2、inlD和inlE转录水平。确定inlC2是否与感染有关。转录结果:在人工胃液中inlC2、inlA和inlB转录水平相对于在BHI中(pH 7:P<0.01)显著增加。相反inlD和inlE转录水平没有变化。结果表明:在人工胃液中inlC2被诱导表达,表明它可能是另外一个在感染中起作用LPXTG内化素基因,再者说明它的表达是单顺反子,独立于inlD和inlE外的单独表达。
     所有以上结果表明inlC2基因缺失增强了LM的致病性,LM的内化作用是以不同的内化素之间相互作用的复杂的网络结构来调节。并且可能与其他感染相关因子(例如分选酶A)与LPTGX基序支撑蛋白的易位有关。
     研究结果为深入探索单核细胞增多症李斯特菌的功能基因及其调控机制、致病性和环境适应性的分子机制等方面具有重要的理论与实践意义。
Listeria monocytogenes(L. monocytogenes, LM) can cause significant foodborne zoonosis. It exists generally in natural environment and food processing environment and resists the acid and salt, which can breed under low temperature. Because it can cause meningitis, septicaemia, gastroenteritis of humans and animals and its mortality approaching 30%, that brings major harm to humans and animals health. The virulence diversity of different source listeria monocytogenes is large, so the study of virulence factor of LM is always the hot spot since The 1980s. Internlin C2 (InlC2) is one of the L. monocytogenes internlin family and exists in the major pathogenic L. monocytogenes. The internlin gene inlC2 is L. monocytogenesspecific and forms an internalin cluster with inlD, inlE and, in some cases, inlG between ascB and dapE to play its function. The recent study shows that InlC2 plays important action in humoral immune together with InlA. To understand the affect of InlC2 in L. monocytogenes infection and the relation with other important internlin gene, the several aspects were studied. The results are as below:
     1、A PCR-based approach revealed the distribution of internlin gene inlA, inlB, inlC, inlC2, inlD, inlE, and inlG and the structure of the internalin cluster between ascB and dapE from 134 source different L. monocytogenes strains. The results showed that internlin gene inlA and inlB existed in all serovars L. monocytogenes but serovars 1/2b strain S10. Internlin gene inlC existed in all lineageⅠ,Ⅱ(121/121) strains and 53.8%(7/13) lineageⅢstrains. Internlin gene inlD existed in all lineageⅠ(55/55) strains,25.7% (17/66)lineageⅡstrains and 69.2%(9/13)lineageⅢstrains. Internlin gene inlE existed in all lineageⅠ,Ⅱ(121/121) strains and 30.7%(4/13) lineageⅢstrains.InlG did not exist in lineageⅠ(0/55) strains and 74.2%(49/66) lineageⅡstrains and 30.7%(4/13) lineageⅢstrains contained this gene.Among 134 strains L. monocytogenes there were 110 strains (82.1%) harbored inlC2. All lineageⅠ(serovars 1/2b and 4b) strains contained inlC2 which was embedded into the inlC2DE cluster except one serovar 1/2b strain bearing inlGC2DE.
     Among lineageⅡstrains,47 of the 49 serovar 1/2a strains carried inlC2 within inlC2DE (17/47) or inlGC2DE (30/47) clusters, while only 1 of the 16 serovar 1/2c strains harbored this gene within inlGC2DE. Of 13 lineageⅢstrains,6 contained inlC2 within inlGC2DE cluster (4/6) or other structures (2/6). In addition, other five Listeria species lacked this gene. Overall, the L. monocytogenes-specific internalin gene inlC2 presents in all lineageⅠand majority of serovar 1/2a strains, and forms internalin cluster with other internalin genes inlD, inlE and, in some cases, inlG. The polymorphism of ascB-dapE internalin cluster may be molecule marker for L. monocytogenes lineage/serovar distinguish.
     2、The homology arms of both ends of inlC2 gene were amplified and fused. InlC2 deletion mutant of L. monocytogenes parent strain LM681 and L10 were constructed by homologous recombination and verified by amphemycin screening, side primer amplification and sequencing.
     3、To examine the influence of inlC2 deletion mutant to L. monocytogenes virulence,we detected the growth cultivation of L. monocytogenes strain LM681 and L10 and their corresponding inlC2 deletion mutant, the proliferation in BALB/c mouse, ICR mouse virulence test, pathologic anatomy and routine tissue staining. The results revealed that the growth cultivation between parent strain and mutant had no obvious diversity,but the survival in mouse spleen of inlC2 mutant was ten fold than parent strain (P<0.01) and about seven fold increment in the liver than parent strain. The LD50 disparity was not significant in ICR mouse virulence test. The tissue stain results displayed that pathological change caused by inlC2 mutate was obvious than that of parent strain, especially in brain, spleen and liver. This indicated that inlC2 was related with L. monocytogenes pathogenecity to mouse and the loss of inlC2 appeared to enhance the pathogenecity.
     4.To investigate whether the putative infection-related internalin gene inlC2 contributed to internalization of L. monocytogenes by epithelial cells, we compared the adhesion and invasion abilities of LM681, L10 and LM681-ΔinlC2 and L10-ΔinlC2 in HeLa cells. Interestingly adherence ofΔinlC2 to HeLa cells was 1.3-fold higher than that of the parent strain (P<0.05), and invasion of DinlC2 into HeLa cells was around 2.7-fold higher than that of its parent strain (P<0.01;). A 1.7-fold increase in intracellular growth of inlC2 deletion mutant was also observed. These data indicated that the loss of inlC2 appeared to enhance the internalization of L. monocytogenes in HeLa cells.
     5. To determine whether the increased internalization of inlC2 mutate was related with the level of inlA and inlB, we evaluated expression of inlA at the transcriptional level by qRT-PCR and at posttranscriptional level by western blot.The results suggested that disruption of inlC2 increased the production of InlA and inlB without changing inlA and inlB transcript level.
     6. In order to clarify whether inlC2 was infection-related, we tested the transcriptional levels of inlA, inlB, inlC2, inlD and inlE when exposed to synthetic human gastric fluid (PH 2.5) and BHI. Transcriptional analysis showed that levels of inlC2, inlA and inlB transcripts in synthetic human gastric fluid significantly increased as compared to those in BHI (pH 7; P\0.01). In contrast, inlD and inlE transcripts remained unchanged These data support that (1) inlC2 is induced in human gastric fluid, representing another LPXTG internalin gene possibly invovled in the infection, and (2) its expression is monocistronic, independently of inlD and inlE expression.
     Overall, this study presents supportive evidence that deletion of inlC2 gene may strengthen the pathogenicity of L. monocytogenes and its internalization is a complex network through the interplay of distinct internalins and possibly other infection-related factors, e.g. sortase A (encoded by strA) that is implicated in translocation of proteins bearing LPTGX motif.
     These study have important significance in theory and practice for exploring deeply the molecule mechanism of functional gene, regulation mechanism, pathogenicity and environmental suitability of L. monocytogenes.
引文
[1]E.G.D.Murray, A. A. Webb, and M. B. R. Swan, "A disease of rabbits characterized by a large mononuclear monocytosis caused by a hitherto undescribed bacillus Bacterium monocytogenes n. sp.," Journal of Pathology & Bacteriology, vol.29, pp.407-439,1926
    [2]J. C. Low and W. Donachie, "A review of Listeria monocytogenes and listeriosis," Veterinary Journal, vol.153, no.1, pp.9-29,1997.
    [3]W. F. Schlech Ⅲ, P. M. Lavigne, R. A. Bortolussi, et al.,"Epidemic listeriosis—evidence for transmission by food," New England Journal of Medicine, vol.308, no.4, pp.203-206, 1983.
    [4]J. A. V'azquez-Boland, M. Kuhn, P. Berche, et al., "Listeria pathogenesis andmolecular virulence determinants," Clinical Microbiology Reviews, vol.14, no.3, pp.584-640,2001.
    [5]M. J. Linnan, L. Mascola, X. D. Lou, et al., "Epidemic listeriosis associated with Mexican-style cheese," New England Journal of Medicine, vol.319, no.13, pp.823-828, 1988.
    [6]Liu D et al. Comparative assessment of acid, alkali and salt tolerance in Listeria monocytogenes virulent and avirulent strains. FEMS Microbiol Lett,243:373-378,2005.
    [7]Gandhi M et al. Listeria:A foodbome pathogen that knows how to survive, Int.1 Food Microbiol,113:1-15,2007.
    [8]Miettinen H et al. Ecology of Listeria spp. in a fish farm and molecular typing of Listeria monocytogenes from fish farming and processing companies. Int J Food Microbiol,112: 138-146,2006.
    [9]Gandhi M,Chikindas ML.Listeria:A foodbome pathogen that knows how to survive.Ira JfoodMicrobiol,13(1):1-15,2006.
    [10]Sleator RD,Hill C.Patho-biotechnology:using bad bugs to do good things(J).Curr Opin Biotechnol,17(2):21-216,2006.
    [11]Y. Siegman-Igra, R. Levin, M. Weinberger, et al."Listeria monocytogenes infection in Israel and review of cases worldwide," Emerging Infectious Diseases, vol.8, no.3, pp. 305-310,2002.
    [12]Public health agency of Canada, "Listeria monocytogenes outbreak," Anonymous,2009, http://www.phac-aspc.gc.ca/alert-alerte/listeria/listeria2009-eng.php.
    [13]R. Bartt, "Listeria and atypical presentations of Listeria in the central nervous system," Seminars in Neurology, vol.20, no.3, pp.361-373,2000.
    [14]D. A. Drevets and M. S. Bronze, "Listeria monocytogenes:epidemiology, human disease, and mechanisms of brain invasion," FEMS Immunology and Medical Microbiology, vol.53, no.2, pp.151-165,2008.
    [15]C. J. B"ula, J. Bille, and M. P. Glauser, "An epidemic of foodborne listeriosis in western Switzerland:description of 57 cases involving adults," Clinical Infectious Diseases, vol. 20,no.1, pp.66-72,1995.
    [16]R. Malinverni, J. Bille, C. Perret, et al., "Epidemic listeriosis. Report of 25 cases in 15 months at the Vaud University Hospital Center," Schweizerische Medizinische Wochenschrift,vol.115, no.1, pp.2-10,1985.
    [17]J. Pizarro-Cerda and P. Cossart, "Subversion of cellular functions by Listeria monocytogenes," Journal of Pathology, vol.208, no.2, pp.215-223,2006.
    [18]M. Hamon, H. Bierne, and P. Cossart, "Listeria monocytogenes:a multifaceted model,' Nature Reviews Microbiology, vol.4, no.6, pp.423-434,2006.
    [19]S. Seveau, J. Pizarro-Cerda, and P. Cossart, "Molecular mechanisms exploited by Listeria monocytogenes during host cell invasion,"Microbes and Infection, vol.9, no.10, pp. 1167-1175,2007.
    [20]P. Cossart, "Listeriology (1926-2007):the rise of a model pathogen," Microbes and Infection, vol.9, no.10, pp.1143-1146,2007.
    [21]P. Cossart and A. Toledo-Arana, "Listeria monocytogenes, a unique model in infection biology:an overview," Microbes and Infection, vol.10, no.9, pp.1041-1050,2008.
    [22]A. Toledo-Arana, O. Dussurget, G. Nikitas, et al. "The Listeria transcriptional landscape from saprophytism to virulence," Nature, vol.459, no.7249, pp.950-956,2009.
    [23]S. Mostowy and P. Cossart, "Cytoskeleton rearrangements during Listeria infection: clathrin and septins as new players in the game," Cell Motility and the Cytoskeleton, vol.66, no.10, pp.816-823,2009.
    [24]R. S. Flannagan, G. Cosio, and S. Grinstein, "Antimicrobial mechanisms of phagocytes and bacterial evasion strategies," Nature Reviews Microbiology, vol.7, no.5, pp.355-366, 2009.
    [25]E. G. Pamer, "Immune responses to Listeria monocytogenes," Nature Reviews Immunology, vol.4, no.10, pp.812-823,2004.
    [26]Hain T, Steinweg C, Kuenne CT, et al. W hole genome sequence of Listeria welshimeri reveals common steps in genome reduction with Listeria inocua as compared to Listeria monocytogenes. J Bacterio 1,188(21):7405-7415,2006.
    [27]Rocourt J, Cossart P.Listeria monocytogenes.Washington D. C:ASM Press,337-352,1997.
    [28]Vazquez-Boland J A,Kuhn M,Berche P,et al.Listeria patho-genesis and molecular virulence determinants(J3. Clin Microbiol Rev,14(3)1584-640,2001.
    [29]Bula CJ, Bille J, Glauser MP. An epidemic of food-borne listeriosis in Western Switzerland:Description of 57 cases involving adults. Clin Infect Dis,20:66-72,1995.
    [30]R. D. Sleator, C. G. M. Gahan, and C. Hill, "A postgenomic appraisal of osmotolerance in Listeria monocytogenes," Applied and Environmental Microbiology, vol.69, no.1, pp.1-9, 2003.
    [31]F. Abram, E. Starr, K. A. G. Karatzas, et al., "Identification of components of the sigma B regulon in Listeria monocytogenes that contribute to acid and salt tolerance," Applied and Environmental Microbiology, vol.74, no.22, pp.6848-6858,2008.
    [32]M. K. Borucki, J. D. Peppin, D.White, F. Loge, and D. R. Call, "Variation in biofilm formation among strains of Listeria monocytogenes," Applied and Environmental Microbiology, vol.69, no.12, pp.7336-7342,2003.
    [33]H. de Valk, C. Jacquet, V. Goulet, et al., "Surveillance of Listeria infections in Europe," Euro Surveillance, vol.10, no.10, pp.251-255,2005.
    [34]V. Goulet, C. Hedberg, A. Le Monnier, and H. de Valk, "Increasing incidence of listeriosis in France and other European countries," Emerging Infectious Diseases, vol.14,no. 5, pp.734-740,2008.
    [35]J. Denny and J. McLauchlin, "Human Listeria monocytogenes infections in Europe—an opportunity for improved European surveillance," Euro Surveillance, vol.13, no.13, article5, p.8082,2008.
    [36]I. A. Gillespie, J. McLauchlin, K. A. Grant, et al., "Changing pattern of human listeriosis, England andWales,2001-2004," Emerging Infectious Diseases, vol.12, no.9, pp. 1361-1366,2006.
    [37]I. A. Gillespie, J. McLauchlin, C. L. Little, et al., "Disease presentation in relation to infection foci for non-pregnancyassociated human listeriosis in England and Wales,2001 to2007," Journal of Clinical Microbiology, vol.47, no.10, pp.3301-3307,2009.
    [38]"The Community summary report on trends and sources of zoonoses and zoonotic agents in the European Union in 2007," The EFSA Journal, vol.223, pp.1-215,2009.
    [39]Update multislate outbreak of Listerosis- United States [J] MMWR Morb Mortal Wkly Rep,47(51-52):1117-1118,1999.
    [40]Centers for Disease Control and Prevent ion. Outbreak of listeriosis northeastern United States [J]. MMWR,25 (42):950-951,2002.
    [41]Salamina G, Dalle DE, Niccol ini A, et al. A food born outbreak of gastroenteristis involvin g Listeria monocytogenes [J]. Epidemiol Infect,1996,117(3):429-436.
    [42]肖义泽,任丽娟,王金玉,等.云南省首次动物源性李斯特菌病暴发的流行病学调查[J].中华流行病学杂志,21(3):236,2000.
    [43]郭仰霖,曾凡伟,王培玉,等.上杭县人畜李斯特菌病发病与带菌调查研究[J].海峡预防医学杂志,5(3):9-10,1999.
    [44]袁宝君,戴建华,乔听,等.2007年江苏省食源性致病菌监测分析[J].中国食品卫生杂志,21(2):114-116,2009.
    [45]张秀丽,廖兴广,张丁,等.2005年河南省食源性性致病菌和耐药性监测[J].中国卫生检验杂志,16(7):842-844,2006.
    [46]梅玲玲,程苏云,朱敏,等.2000-2004年浙江省食品中单增李斯特菌污染状况调查[J].中国卫生检验杂志,16(7):784-786,2006.
    [47]高旗利,罗茂凰,张海滨,等.美国进口冻猪舌中检出单增李斯特菌的报告[J]中国国境卫生检疫杂志,25(2):79-80,2002.
    [48]薛华平,王民,郑莹,等.进口冻禽产品中李斯特菌的检验[J]中国兽医科技,1996,26(1):43-46
    [49]J. McLauchlin, "Human listeriosis in Britain,1967-1985, a summary of 722 cases:2. Listeriosis in non-pregnant individuals, a changing pattern of infection and seasonal incidence," Epidemiology and Infection, vol.104, no.2, pp.191-201,1990.
    [50]M. L. Paul, D. E. Dwyer, C. Chow, et al., "Listeriosis—a review of eighty-four cases," Medical Journal of Australia, vol.160, no.8, pp.489-493,1994.
    [51]C. E. Cherubin, M. D. Appleman, P. N. R. Heseltine, W. Khayr, and C. W. Stratton, "Epidemiological spectrum and current treatment of listeriosis," Reviews of Infectious Diseases, vol.13, no.6, pp.1108-1114,1991.
    [52]K. Skogberg, J. Syrjanen, M. Jahkola, et al., "Clinical presentation and outcome of listeriosis in patients with and without immunosuppressive therapy," Clinical Infectious Diseases, vol.14, no.4, pp.815-821,1992.
    [53]E. M. Jones, S. Y. McCulloch, D. S. Reeves, and A. P. MacGowan, "A 10 year survey of the epidemiology and clinical aspects of listeriosis in a provincial English city,"Journal of Infection, vol.29, no.1, pp.91-103,1994.
    [54]J. Nolla-Salas, J. M. Anto, M. Almela, et al., "Incidence of listeriosis in Barcelona, Spain, in 1990. The Collaborative Study Group of Listeriosis of Barcelona," European Journal of Clinical Microbiology and Infectious Diseases, vol.12, no.3, pp.157-161,1993.
    [55]B. G. Gellin and C. V. Broome, "Listeriosis," Journal of the AmericanMedical Association, vol.261, no.9, pp.1313-1320,1989.
    [56]Farber, J. M., and P. I. Peterkin. Listeria monocytogenes, a food-borne pathogen. Microbiol.Rev.55:476-511,1991
    [57]Jacquet, C., A.-F. Miegeville, B. Catimel, G. Huyn, A.-L. Courtieu, and J.Rocourt. La liste'riose humaine en France en 1991,1992 et 1993. Bull.Epide'miol. Hebdom. 28:123-125,1994.
    [58]Rocourt, J., and R. Brosch. Human listeriosis 1990. Document WHO/ HPP/FOS/92.4. World Health Organization, Geneva, Switzerland.1992.
    [59]Tappero, J. W., A. Schuchat, K. A. Deaver, L. Mascola, J. D. Wenger, and the Listeriosis Study Group. Reduction in the incidence of humanlisteriosis in the United States. JAMA 273:1118-1122,1995.
    [60]Nolla-Salas, J., J. M. Anto, M. Almela, P. Coll, I. Gasser, and A. Plasencia.1993. Incidence of listeriosis in Barcelona, Spain, in The collaborative study group of listeriosis of Barcelona. Eur. J. Clin. Microbiol. Infect. Dis.12:157-161,1990.
    [61]Goulet, V., and S. Brohier. Listeriosis in France in 1986:survey of hospital laboratories. 1989. Pathol. Biol.37:206-211..
    [62]Ho, J. L., K. N. Shands, G. Friedland, P. Eckind, and D. W. Fraser. An outbreak of type 4b Listeria monocytogenes infection involving patients from eight Boston hospitals. Arch. Intern. Med.146:520-524,1986..
    [63]Schlech, W. F., Ⅲ, P. M. Lavigne, R. A. Bortolussi, A. C. Allen, E. V.Haldane, A. J. Wort, A. W. Hightower, S. E. Johnson, S. H. King, E. S.Nicholls, and C. V. Broome. Epidemic listeriosis—evidence for transmission by food. N. Engl. J. Med.308:203-206,1983
    [64]Schwartz, B., D. Hexter, C. V. Broome, A. W. Hightower, R. B. Hirschhorn, J. D. Porter, P. S. Hayes, W. F. Bibb, B. Lorber, and D. G. Faris. Investigation of an outbreak of listeriosis:new hypotheses for the etiology of epidemic Listeria monocytogenes infections. J. Infect. Dis.159:680-685,1989.
    [65]T. L. Jackson, S. J. Eykyn, E. M. Graham, and M. R. Stanford, "Endogenous bacterial endophthalmitis:a 17-year prospective series and review of 267 reported cases," Survey of Ophthalmology, vol.48, no.4, pp.403-423,2003.
    [66]K. Kida, N. Osada, K. Isahaya, et al., "Listeria endocarditis with acute thoracoabdominal aortic dissection," Internal Medicine, vol.46, no.15, pp.1209-1212,2007.
    [67]K. Jayaraj, A. M. Di Bisceglie, and S. Gibson, "Spontaneous bacterial peritonitis caused by infection with Listeria monocytogenes:a case report and review of the literature," American Journal of Gastroenterology, vol.93, no.9, pp.1556-1558,1998.
    [68]V. Vargas, C. Alem'an, I. De Torres, et al., "Listeria monocytogenes- associated acute hepatitis in a liver transplant recipient," Liver, vol.18, no.3, pp.213-215,1998.
    [69]M. Garcia-Montero, J. L. Rodriguez-Garcia, P. Calyo, et al., "Pneumonia caused by Listeria monocytogenes," Respiration, vol.62, no.2, pp.107-109,1995.
    [70]L. Mereghetti, N. Marquet-van der Mee, P. Laudat, J. Loulergue, J. Jeannou, and A. Audurier, "Listeria monocytogenes septic arthritis in a natural joint:report of a case and review,"Clinical Microbiology and Infection, vol.4, no.3, pp.165-168,1998.
    [71]G. Revathi, A. Suneja, V. Talwar, and N. Aggarwal, "Fatal pericarditis due to Listeria monocytogenes," European Journal of Clinical Microbiology and Infectious Diseases, vol.14, no.3,pp.254-255,1995.
    [72]M. L. Durand, S. B. Calderwood, D. J. Weber, et al. "Acute bacterial meningitis in adults—a review of 493 episodes," New England Journal of Medicine, vol.328, no.1, pp. 21-28,1993.
    [73]A. Schuchat, K. Robinson, J. D. Wenger, et al., "Bacterial meningitis in the United States in 1995. Active Surveillance Team," New England Journal of Medicine, vol.337, no.14, pp.970-976,1997.
    [74]B. Sigurdardottir, O. M. Bjornsson, K. E. Jonsdottir, H. Erlendsdottir, and S. Gudmundsson, "Acute bacterial meningitis in adults:a 20-year overview," Archives of Internal Medicine, vol.157, no.4, pp.425-430,1997.
    [75]H. Eck, "Encephalomyelitis listeriaca apostematosa," Schweizerische Medizinische Wochenschrift, vol.87, no.9, pp.210-214,1957.
    [76]P.-A. Uldry, T. Kuntzer, J. Bogousslavsky, et al., "Early symptoms and outcome of Listeria monocytogenes rhombencephalitis:14 adult cases," Journal of Neurology, vol.240, no.4, pp.235-242,1993.
    [77]J. A. Crump, P. M. Griffin, and F. J. Angulo, "Bacterial contamination of animal feed and its relationship to human foodborne illness," Clinical Infectious Diseases, vol.35, no. 7,pp.859-865,2002.
    [78]F. Driehuis and S. J.W. H. Oude Elferink, "The impact of the quality of silage on animal health and food safety:a review,"Veterinary Quarterly, vol.22, no.4, pp.212-216,2000.
    [79]H. Ueno, K. Yokota, T. Arai, et al. "The prevalence of Listeria monocytogenes in the environment of dairy farms,"Microbiology and Immunology, vol.40, no.2, pp. 121-124,1996.
    [80]T. Yoshida, Y. Kato, M. Sato, and K. Hirai, "Sources and routes of contamination of raw milk with Listeria monocytogenes and its control," Journal of VeterinaryMedical Science,vol. 60, no.10, pp.1165-1168,1998.
    [81]H. O. Mohammed, K. Stipetic, P. L. McDonough, R. N. Gonzalez, D. V. Nydam, and E. R. Atwill, "Identification of potential on-farm sources of Listeria monocytogenes in herds of dairy cattle," American Journal of Veterinary Research, vol.70, no.3, pp.383-388,2009.
    [82]M. Sanaa, B. Poutrel, J. L. Menard, and F. Serieys, "Risk factors associated with contamination of raw milk by Listeria monocytogenes in dairy farms," Journal of Dairy Science, vol.76, no.10, pp.2891-2898,1993.
    [83]M. L. Gray, "Isolation of Listeria monocytogenes from oat silage," Science, vol.132, no. 3441, pp.1767-1768,1960.
    [84]M. L. Gray, "A possible link in the relationship between silage feeding and listeriosis," Journal of the American Veterinary Medical Association, vol.136, no.5, pp.205-208,1960
    [85]D. R. Fenlon, "Wild birds and silage as reservoirs of Listeria in the agricultural environment," Journal of Applied Bacteriology, vol.59, no.6, pp.537-543,1985.
    [86]A. S. Donald, D. R. Fenlon, and B. Seddon, "The relationship between ecophysiology, indigenous microflora and growth of Listeria monocytogenes in grass silage," Journal of Applied Bacteriology, vol.79, no.2, pp.141-148,1995.
    [87]J. A. V'azquez-Boland, L. Dominguez, M. Blanco, et al."Epidemiologic investigation of a silage-associated epizootic of ovine listeric encephalitis, using a new Listeria-selective enumeration medium and phage typing," American Journal of Veterinary Research, vol.53, no.3, pp.368-371,1992.
    [88]E. T. Ryser, S. M. Arimi, and C. W. Donnelly, "Effects of pH on distribution of Listeria ribotypes in corn, hay, and grass silage," Applied and Environmental Microbiology, vol.63, no.9, pp.3695-3697,1997.
    [89]D. Heim, R. Fatzer, B. Hornlimann, and M. Vandevelde, "Frequency of neurological diseases in cattle," SchweizerArchiveur Tierheilkunde, vol.139, no.8, pp.354-362,1997.
    [90]M. Jeffrey, "A neuropathological survey of brains submitted under the Bovine Spongiform Encephalopathy Orders in Scotland," Veterinary Record, vol.131, no.15, pp. 332-337,1992.
    [91]I. S. McGill and G. A. H. Wells, "Neuropathological findings in cattle with clinically suspect but histologically unconfirmed bovine spongiform encephalopathy (BSE)," Journal of Comparative Pathology, vol.108, no.3, pp.241-260,1993.
    [92]M.Miyashita, B. Stierstorfer, andW. Schmahl, "Neuropathological findings in brains of Bavarian cattle clinically suspected of bovine spongiform encephalopathy," Journal of VeterinaryMedicine Series B, vol.51, no.5, pp.209-215,2004.
    [93]A. Oevermann, C. Botteron, T. Seuberlich, et al."Neuropathological survey of fallen stock:active surveillance reveals high prevalence of encephalitic listeriosis in small ruminants," Veterinary Microbiology, vol.130, no.3-4, pp.320-329,2008.
    [94]J. Bille, D. S. Blanc, H. Schmid, et al. "Outbreak of human listeriosis associated with tomme cheese in northwest Switzerland,2005," Euro Surveillance, vol.11, no.6, pp.91-93, 2006.
    [95]剡根强,马勋,张银国等.新疆部分地区绵羊李氏杆菌病流行特点分析[J].中国兽医科技,2001,31(12):41-42.
    [96]P. Boerlin and J.-C. Piffaretti, "Typing of human, animal, food, and environmental isolates of Listeria monocytogenes by multilocus enzyme electrophoresis," Applied and EnvironmentalMicrobiology, vol.57, no.6, pp.1624-1629,1991.
    [97]M. K. Borucki, J. Reynolds, C. C. Gay, et al. "Dairy farm reservoir of Listeria monocytogenes sporadic and epidemic strains," Journal of Food Protection, vol.67, no.11, pp.2496-2499,2004.
    [98]K. K. Nightingale, Y. H. Schukken, C. R. Nightingale, et al."Ecology and transmission of Listena monocytogenes infecting ruminants and in the farm environment," Applied and Environmental Microbiology, vol.70, no.8, pp.4458-4467,2004.
    [99]O. Okwumabua, M. O'Connor, E. Shull, et al. "Characterization of Listeria monocytogenes isolates from food animal clinical cases:PFGE pattern similarity to strains from human listeriosis cases," FEMS Microbiology Letters, vol.249, no.2, pp.275-281, 2005.
    [100]K~java A,K0be B. Assessment of the ability to model proteins with leueine-rich repeats in light of the latest structural information. Protein science,11:1082-1090,2002.
    [101]Dussurget O,Pizarro-Cerda J,Cossart P.Molecular determinants of Listeria monocylogenes virulence(J).Annu Rev Microbiol,58:587--610,2004.
    [102]Hamon M,Bierne H,Cossart P.Listeria monocytogenes:a multifaceted model[J].Nat Rev Microbiol,4(6):423-434,2006.
    [103]Rousseaux S,Olier M,Lemaitre JP,et al.Use of PCR-restriction fragment length polymorphism of inlA for rapid screening of Listeria monocytogenes strains deficient in the ability to invadeCaco-2 cells[J].Appl Environ Microbiol,70 (4):2180-2185,2004.
    [104]Oiler M,Garmyn D,Rousseaux S,et al.Truncated internalin Aand a symptomatic Listeria monocytogenes carriage:in vivo investigation by allelic exchange(J). Infect Immun,73(1):644-648,2005.
    [105]Khelef N, Lecu it M, Bierne H, et al. S pecies specificit y of the listeria monocytogenes InlB protein[J]. Cell Microbiol,8(3):457-470,2006.
    [106]Bergmann B, Raff el sbauer D, Kuhn M, et al. InlA but not InlB mediated internalization of Listeria monocytoenes by nonphagocytic mammalian cells needs the support of other internalins[J].Mol Microbiol,43(3):557-570,2002.
    [107]Biern e H, Mazmanian S K, T rost M, et al. Inactivation of the sortA gene in Listeria monocytogenes inhibits anchoring of surface proteins and affects virulence[J]. Mol Microb iol,43(4):869-881,2002.
    [108]Bierne H, Garandeau C, Pucciarelli M G, et al. Sortase B, a new class of sort as e in Listeria monocytogenes[J]. J Bacteriol,186 (7):1972-1982,2004.
    [109]Schnupf P et al. Regulated translation of listeriolysin O controls virulence of Listeria monocytogenes. Mol Microbiol,61:999-1012,2006.
    [110]Yeung PS et al. Compartmentalization of the broad-range phospholipase C activity to the spreading vacuole is critical for Listeria monocytogenes virulence. Infect Immun,75: 44-51,2007.
    [111]Underhill DM et al. Phagocytosis of microbes:complexity in action. Annu Rev Immunol,20:825-852,2002.
    [112]Freitag N. From hot dogs to host cells:how the bacterial pathogen Listeria monocytogenes regulates virulence gene expression. Future Microbiology,1:89-101,2006.
    [113]Vazquez-Boland JA et al. Listeria pathogenesis and molecular virulence determinants. Clin Microbiol Rev,14:584-640,2001.
    [114]Grundling A et al. Requirement of the Listeria monocytogenes broad-range phospholipase PC-PLC during infection of human epithelial cells. J Bacteriol,185: 6295-6307,2003.
    [115]Shaughnessy LM et al. Membrane perforations inhibit lysosome fusion by altering pH and calcium in Listeria monocytogenes vacuoles, Cell Microbiol,8:781-792,2006.
    [116]Glomski IJ et al. Listeria monocytogenes mutants that fail to compartmentalize Listerolysin O activity are cytotoxic, avirulent, and unable to evade host extracellular defenses. Infect Immun,71:6754-6765,2003.
    [117]Schnupf P et al. Phosphorylation, ubiquitination and degradation of listeriolysin O in mammalian cells:role of the PEST-like sequence. Cellular Microbiology,8:353-364,2006.
    [118]Schluter D et al. Phosphatidylcholine-specific phospholipase C from Listeria monocytogenes is an important virulence factor in murine cerebral listeriosis. Infect Immun, 66:5930-5938,1998.
    [119]Smith GA et al. The two distinct phospholipases C of Listeria monocytogenes have overlapping roles in escape from a vacuole and cell-to-cell spread. Infect Immun,63: 4231-4237,1995.
    [120]Wadsworth SJ et al. Mobilization of protein kinase C in macrophages induced by Listeria monocytogenes affects its internalization and escape from the phagosome. Infect Immun,70:4650-4660,2002.
    [121]Alberti-Segui C et al. Differential function of Listeria monocytogenes listeriolysin O and phospholipases C in vacuolar dissolution following cell-to-cell spread. Cell Microbiol,9: 179-195,2007.
    [122]Liu D.Identification,subtyping and virulence determination of Listeria monocytogenes, an important foodborne pathogen(J).J Med Microbiol,55(Pt 6):645-659,2006.
    [123]Cabanes D,Dussurget O,Dehoux P,et al.Auto,a surface associated autolysin of Listeria monocytogenes required for entry into eukaryotic cells and virulence(J).Mol Microbiol,51(6):1601-1614,2004.
    [124]Kendy J K Y W, Nancy E F. A novel mutation within the central Listeria monocytogenes regulat or PrfA that results in constitutive expression of virulence gene products [J] Bacteriol,186:6265-6276,2004.
    [125]O. Dussurget, J. Pizarro-Cerda, and P. Cossart, "Molecular determinants of Listeria monocytogenes virulence," Annual Review of Microbiology, vol.58, pp.587-610,2004.
    [126]J.McLauchlin and J. C. Low, "Primary cutaneous listeriosis in adults:an occupational disease of veterinarians and farmers,"Veterinary Record, vol.135, no.26, pp.615-617,1994.
    [127]E. J. Regan, G. A. J. Harrison, S. Butler, et al."Primary cutaneous listeriosis in a veterinarian," Veterinary Record, vol.157, no.7, p.207,2005.
    [128]P. D. Cotter, C. G. M. Gahan, and C. Hill, "Analysis of the role of the Listeria monocytogenes FOF1-ATPase operon in the acid tolerance response," International Journal of Food Microbiology, vol.60, no.2-3, pp.137-146,2000.
    [129]P. D. Cotter, C. G M. Gahan, and C. Hill, "A glutamate decarboxylase system protects Listeria monocytogenes in gastric fluid," Molecular Microbiology, vol.40, no.2, pp. 465-475,2001.
    [130]M. Begley, R. D. Sleator, C. G. M. Gahan, and C. Hill, "Contribution of three bile-associated loci, bsh, pva, and btlB, to gastrointestinal persistence and bile tolerance of Listeria monocytogenes," Infection and Immunity, vol.73, no.2, pp.894-904,2005.
    [131]O. Dussurget, D. Cabanes, P. Dehoux, et al., "Listeria monocytogenes bile salt hydrolase is a PrfA-regulated virulence factor involved in the intestinal and hepatic phases of listeriosis," Molecular Microbiology, vol.45, no.4, pp.1095-1106,2002.
    [132]R. D. Sleator, H. H.Wemekamp-Kamphuis, C. G. M. Gahan, T. Abee, and C. Hill, "A PrfA-regulated bile exclusion system(BilE) is a novel virulence factor in Listeria monocytogenes," Molecular Microbiology, vol.55, no.4, pp.1183-1195,2005.
    [133]J. Hardy, K. P. Francis, M. DeBoer, et al. "Extracellular replication of Listeria monocytogenes in the murine gall bladder," Science, vol.303, no.5659, pp.851-853,2004.
    [134]O. Dussurget, "New insights into determinants of Listeria monocytogenes virulence," International Review of Cell and Molecular Biology, vol.270, pp.1-38,2008.
    [135]G. B. Mackaness, "Cellular resistance to infection," The Journal of Experimental Medicine, vol.116, pp.381-406,1962.
    [136]H. Bierne, C. Sabet, N. Personnic, and P. Cossart, "Internalins:a complex family of leucine-rich repeat-containing proteins in Listeria monocytogenes," Microbes and Infection, vol.9, no.10, pp.1156-1166,2007
    [137]P. Berche, "Bacteremia is required for invasion of the murine central nervous system by Listeria monocytogenes," Microbial Pathogenesis, vol.18, no.5, pp.323-336,1995.
    [138]S. L opez, A. J.Marco, N. Prats, and C. J. Czuprynski, "Critical role of neutrophils in eliminating Listeria monocytogenes from the central nervous systemduring experimentalmurine listeriosis," Infection and Immunity, vol.68, no.8, pp.4789-4791,2000.
    [139]S. L'opez, N. Prats, and A. J. Marco, "Expression of Eselectin, P-selectin, and intercellular adhesion molecule-1 during experimental murine listeriosis," American Journal of Pathology, vol.155, no.4, pp.1391-1397,1999.
    [140]N. Prats, V. Briones, M. M. Blanco, et al., "Choroiditis and meningitis in experimental murine infection with Listeria monocytogenes," European Journal of Clinical Microbiology and Infectious Diseases, vol.11, no.8, pp.744-747,1992.
    [141]U. Sibelius, T. Chakraborty, B. Kr"ogel, et al., "The listerial exotoxins listeriolysin and phosphatidylinositolspecific phospholipase C synergize to elicit endothelial cell phosphoinositide metabolism," Journal of Immunology, vol.157, no.9, pp.4055-4060,1996.
    [142]U. Sibelius, F. Rose, T. Chakraborty, et al. "Listeriolysin is a potent inducer of the phosphatidylinositol response and lipid mediator generation in human endothelial cells," Infection and Immunity, vol.64, no.2, pp.674-676,1996.
    [143]D. A. Drevets, R. T. Sawyer, T. A. Potter, and P. A. Campbell, "Listeria monocytogenes infects human endothelial cells by two distinct mechanisms," Infection and Immunity, vol.63, no.11, pp.4268-4276,1995.
    [144]D. A. Drevets, "Dissemination of Listeria monocytogenes by infected phagocytes," Infection and Immunity, vol.67, no.7,pp.3512-3517,1999.
    [145]S. L. Wilson and D. A. Drevets, "Listeria monocytogenes infection and activation of human brain microvascular endothelial cells," Journal of Infectious Diseases, vol.178, no.6, pp.1658-1666,1998.
    [146]D. A. Drevets, T. A. Jelinek, and N. E. Freitag, "Listeria monocytogenes- infected phagocytes can initiate central nervous system infection in mice," Infection and Immunity, vol.69, no.3, pp.1344-1350,2001.
    [147]L. Greiffenberg, W. Goebel, K. S. Kim, et al., "Interaction of Listeria monocytogenes with human brain microvascular endothelial cells:InlB-dependent invasion, long-term intracellular growth, and spread from macrophages to endothelial cells," Infection and Immunity, vol.66, no.11, pp.5260-5267,1998.
    [148]T. J. Abbruscato and T. P. Davis, "Protein expression of brain endothelial cell E-cadherin after hypoxia/aglycemia:influence of astrocyte contact," Brain Research, vol.842, no.2, pp.277-286,1999.
    [149]D. Pal, K. L. Audus, and T. J. Siahaan, "Modulation of cellular adhesion in bovine brain microvessel endothelial cells by a decapeptide," Brain Research, vol.747, no.1, pp. 103-113,1997.
    [150]J. Szmydynger-Chodobska, C. L. Pascale, A. N. Pfeffer, C. Coulter, and A. Chodobski, "Expression of junctional proteins in choroid plexus epithelial cell lines:a comparative study," Cerebrospinal Fluid Research, vol.4, article 11,2007.
    [151]D. Schl uter, E. Domann, C. Buck, et al."Phosphatidylcholine-specific phospholipase C from Listeria monocytogenes is an important virulence factor in murine cerebral listeriosis," Infection and Immunity, vol.66, no.12, pp.5930-5938,1998.
    [152]Armstrong, B. A., and C. P. Sword. Electron microscopy of Listeria monocytogenes-infected mouse spleen. J. Bacteriol.91:1346-1355,1966.
    [153]Bach, M. C., and K. M. Davis. Listeria rhombencephalitis mimicking tuberculous meningitis. Rev. Infect. Dis.9:130-133,1987.
    [154]Brun-Buisson, C. J., E. De Gialluly, R. Gherardi, G. Otterbein, F. Gray, and M. Rapin.Fatal nonmeningitic Listeria rhombencephalitis:reports of two cases. Arch. Intern. Med.145:1982-1985,1985.
    [155]Charlton, K. M., and M. M. Garcia. Spontaneous listeric encephalitis and neuritis in sheep. Vet. Pathol.14:297-313,1977.
    [156]Cordy, D. R., and J. W. Osebold. The neuropathogenesis of Listeria encephalomyelitis in sheep and mice. J. Infect. Dis.104:164-173,1959.
    [157]Gill, D. A."Circling" disease:a meningoencephalitis of sheep in New Zealand. Vet. J. 89:258-270,1933.
    [158]Gill, D. A. Ovine bacterial encephalitis (circling disease) and the bacterial genus Listerella. Aust. Vet. J.13:46-56,1937.
    [159]Jones, T. C., and R. D. Hunt.. Veterinary pathology,5th ed., p.631-634,1983.Lea and Febiger, Philadelphia, Pa.
    [160]Rebhun, W. C., and A. deLahunta. Diagnosis and treatment of bovine listeriosis. J. Am. Vet. Med. Assoc.180:395-398,1982.
    [161]Va'zquez-Boland,J.A,L.Domrnguez,M.Blanco,J.Rocourt, J. F. Ferna'ndez-Garayza'bal, C. B. Gutie'rrez,R.I.Tasco'n,and E.F..Rodn'guez-Ferri. Epidemiologic investigation of a silage-associated epizootic of ovine listeric encephalitis,using a new Listeria-selective enumeration medium and phage typing.Am.J.Vet.Res.53:368-371,1992.
    [162]Wesley, I. V. Listeriosis in animals, In E. T. Ryser and E. H. Marth (ed.), Listeria, listeriosis, and food safety,2nd ed. Marcel Dekker Inc., New York, N.Y. p.39-73,1999.
    [163]Lo'pez, S., A. J. Marco, N. Prats, and C. J. Czuprynski. Critical role of neutrophils in eliminating Listeria monocytogenes from the central nervous system during experimental murine listeriosis. Infect. Immun.68:4789-4791,2000.
    [164]Marco,A.J.A.Ramos,L.Domi'nguez,M.Domingo,andL.Gonza'lez. Immunocytochemical detection of Listeria monocytogenes in tissue with the peroxidase-antiperoxidase technique. Vet. Pathol.25:385-387,1988.
    [165]Schlu"ter,D.S. Chahoud, H. Lassmann, A. Schumann, H. Huf, and M. Deckert-Schlu"ter. Intracerebral targets and immunomodulation of murine Listeria monocytogenes meningoencephalitis. J. Neuropathol. Exp. Neurol.55:14-24,1996.
    [166]Dons, L., K. Weclewicz, Y. Jin, E. Bindseil, J. E. Olsen, and K. Kristenson. Rat dorsal root ganglia neurons as a model for Listeria monocytogenes infections in culture. Med. Microbiol. Immunol.188:15-21,1999.
    [167]B.J.Currie,D.A.Fisher, D.M. Howard, and J. N. C. Burrow, "Neurological melioidosis," Acta Tropica, vol.74, no.2-3, pp.145-151,2000.
    [168]A. C. Cheng and B. J. Currie, "Melioidosis:epidemiology, pathophysiology, and management," Clinical Microbiology Reviews, vol.18, no.2, pp.383-416,2005.
    [169]P.W.Ladds,A.D.Thomas,and B. Pott, "Melioidosiswith acute meningoencephalomyelitis in a horse," Australian Veterinary Journal, vol.57, no.1, pp.36-38,1981.
    [170]K. T. Wong, S. D. Puthucheary, and J. Vadivelu, "The histopathology of human melioidosis," Histopathology, vol.26, no.1, pp.51-55,1995.
    [171]J. M. Stevens, E. E. Galyov, and M. P. Stevens, "Actindependent movement of bacterial pathogens," Nature Reviews Microbiology, vol.4, no.2, pp.91-101,2006.
    [172]W. J. Wiersinga, T. van der Poll, N. J. White, N. P. Day, and S. J. Peacock, "Melioidosis: insights into the pathogenicity of Burkholderia pseudomallei," Nature Reviews Microbiology, vol.4, no.4, pp.272-282,2006.
    [173]Seeliger HP, Langer B. Serological analysis of the genus Listeria. Its values and limitations. Int J Food Microbiol,8(3):245-8,1989.
    [174]Liu D. Identification, subtyping and virulence determination of Listeria monocytogenes, an important foodborne pathogen. J Med Microbiol,55(Pt 6):645-59,2006.
    [175]Wiedmann M, Bruce JL, Keating C, Johnson AE, McDonough PL, Bart CA. Ribotypes and virulence gene polymorphisms suggest three distinct Listeria monocytogenes lineages with differences in pathogenic potential. Infect Immun,65(7):2707-16,1997.
    [176]Chen Q, Chen J, Wu D, Jiang J, Yang Q, Fang W.Discovery of a naturally typical Listeria monocytogenes strain lacking inlAB. Acta Microbiologic Sinica:49:1033-1039,2009
    [177]F. Engelbrecht a C. Dickneite a R. Lampidis M. GoE tz a U. DasGupta a W. Goebel Sequence comparison of the chromosomal regions encompassing the internalin C genes (inlC) of Listeria monocytogenes and L. ivanovii. Mol Gen Genet,257:186-197,1998.
    [178]Belen Lopez M, Briones V, Fernandez-Garavzabal JF, Vazquez-Boland JA, Garcia JA, Blanco MM, Suarez G, Dominguez L. Serological response in rabbits to Listeria monocytogenes after oral or intragastric inoculation. FEMS Immunol Med Microbiol,7:131-134,1993
    [179]Lhopital S, Marly J, Pardon P, Berche P Kinetics of antibody production against listeriolysin O in sheep with listeriosis. J Clin Microbiol,31:1537-1540,1993.
    [180]Mackaness GB Cellular resistance to infection. J Exp Med,l 16:381-406,1962.
    [181]Edelson BT, Unanue ER Immunity to Listeria infection. Curr Opin Immunol,12:425-431,2000.
    [182]Gentschev I, Sokolovic Z, Kohler S, Krohne GF, Hof H, Wagner J, Goebel W. Identification of p60 antibodies in human sera and presentation of this listerial antigen on the surface of attenuated salmonellae by the HlyB-HlyD secretion system. Infect Immun,60:5091-5098,1992.
    [183]Renneberg J, Persson K, Christensen P. Western blot analysis of the antibody response in patients with Listeria monocytogenes meningitis and septicemia. Eur J Clin Microbiol Infect Dis,9:659-663,1990.
    [183]Bierne H, Mazmanian SK, Trost M, Pucciarelli MG, Liu G, Dehoux P, Ja nsch L, Garcia-del PF, Schneewind O, Cossart P, European Listeria Genome Consortium.Inactivation of the srtA gene in Listeria monocytogenes inhibits anchoring of surface proteins and affects virulence. Mol Microbiol,43:869-881,2002.
    [184]Bierne H, Sabet C, Personnic N, Cossart P.Internalins:acomplex family of leucine-rich repeat-containing proteins in Listeria monocytogenes. Microbes Infect,9:1156-1166,2007.
    [185]Chen J, Zhang X, Mei L, Jiang L, Fang W.Prevalence of Listeria in Chinese food products from 13 provinces between 2000 and 2007 and virulence characterization of Listeria monocytogenes isolates. Foodborne Pathog Dis,6:7-14,2009.
    [186]Hamon M, Bierne H, Cossart P Listeria monocytogenes:a multifaceted model. Nat Rev Microbiol,4:423-434,2006.
    [187]Croize, J., J. Arvieux, P. Berche, and M. G. Colomb. Activation of the human complement alternative pathway by Listeria monocytogenes:evidence for direct binding and proteolysis of the C3 component on bacteria. Infect. Immun.61:5134-5139,1993.
    [188]Beauregard, K. E., K. D. Lee, R. J. Collier, and J. A. Swanson. pH-dependent perforation of macrophage phagosomes by listeriolysin O from Listeria monocytogenes. J. Exp.Med.186:1159-1163,1997.
    [189]Gaillard, J.-L., P. Berche, J. Mounier, S. Richard, and P. Sansonetti. In vitro model of penetration and intracellular growth of Listeria monocytogenes in the human enterocyte-like cell line Caco-2. Infect. Immun.55:2822-2829,1987.
    [190]Tilney, L. G., and D. A. Portnoy. Actin filaments and the growth, movement, and spread of the intracellular bacterial parasite, Listeria monocytogenes. J. Cell Biol. 109:1597-1608,1989.
    [191]Goebel, W., and J. Kreft. Cytolysins and the intracellular life of bacteria. Trends Microbio,5:86-88,1997.
    [192]Livak KJ, Schmittgen TD. Analysis of relative gene expression data using real-time quantitative PCR and the 2(-Delta DeltaC(T)) Method. Methods.25:402-408,2001.
    [193]Nightingale KK, Ivy RA, Ho AJ, Fortes ED, Njaa BL, Peters RM,Wiedmann M. inlA premature stop codons are common among Listeria monocytogenes isolates from foods and yield virulence-attenuated strains that confer protection against fully virulent strains. Appl Environ Microbiol.74:6570-6583,2008.
    [194]Freitag NE, Port GC, Miner MD. Listeria monocytogenes from saprophyte to intracellular pathogen. Nat Rev Microbiol.7:623-628,2009.
    [195]Camejo A, Buchrieser C, Couve'E, Carvalho F, Reis O, Ferreira P,Sousa S, Cossart P, Cabanes D.In vivo transcriptional profiling of Listeria monocytogenes and mutagenesis identify new virulence factors involved in infection. PloS Pathog,5:el000449,2009.
    [196]Velge P, Roche SM Variability of Listeria monocytogenes virulence:a result of the evolution between saprophytism and virulence? Future Microbiol.5:1799-1821,2010.
    [197]Sleator RD, Watson D, Hill C, Gahan CGM.The interaction between Listeria monocytogenes and the host GI tract. Microbiology,155:2463-2475,2009.
    [198]Chen Q, Chen J, Wu D, Jiang J, Yang Q, Fang W.Discovery of a naturally atypical Listeria monocytogenes strain lacking inlAB. Acta Microbiologica Sinica.49:1033-1039,2009
    [199]Bergmann B, Raffelsbauer D, Kuhn M, Goetz M, Hom S, Goebel W.InlA-but not InlB-mediated internalization of Listeria monocytogenes by non-phagocytic mammalian cells needs the support of other internalins. Mol Microbiol,43:557-570,2002.

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