Ecological studies of Yersinia enterocolitica. II. Experimental infection with Y. enterocolitica in pigs

False-positive serological reactions (FPSR) due to infections with Yersinia enterocolitica serotype O[ratio ]9 (YeO[ratio ]9) are a problem in tests for brucellosis. In the present study, FPSR in classical and novel tests for brucellosis following experimental infections of pigs with YeO[ratio ]9 were compared with responses of B. suis biovar 2-inoculated pigs. FPSR were limited to 2–9 weeks post-YeO[ratio ]9 inoculation, while B. suis-infected pigs were test-positive throughout the 21-week period of investigation. Although YeO[ratio ]9-inoculated pigs exhibited FPSR in Brucella tests for a limited period of time, the serological responses in a YeO[ratio ]9-purified O-antigen indirect ELISA did not decrease accordingly. Analysis of available cross-sectional serum samples from pig herds naturally infected with YeO[ratio ]9 or B. suis biovar 2 confirmed that the observed difference in the duration of the serological responses between the two infections could be used to discriminate between herds infected with B. suis biovar 2 and YeO[ratio ]9.

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Ecological studies of Yersinia enterocolitica I. Dissemination of Y. enterocolitica in pigs

Veterinary Microbiology ◽

10.1016/0378-1135(83)90041-x ◽

1983 ◽

Vol 8 (5) ◽

pp. 469-483 ◽

Cited By ~ 48

Author(s):

H. Fukushima ◽

R. Nakamura ◽

Y. Ito ◽

K. Saito ◽

M. Tsubokura ◽

...

Keyword(s):

Yersinia Enterocolitica ◽

Ecological Studies

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Effect of the combination of clavulanic acid and cephalothin on an experimental infection with Yersinia enterocolitica in iron-overloaded mice

Journal of Antimicrobial Chemotherapy ◽

10.1093/jac/22.5.707 ◽

1988 ◽

Vol 22 (5) ◽

pp. 707-713 ◽

Cited By ~ 1

Author(s):

Maria Jimenez-Valera ◽

Alfonso Ruiz-Bravo ◽

Maria del Carmen Gómez ◽

Alberto Ramos-Cormenzana

Keyword(s):

Clavulanic Acid ◽

Yersinia Enterocolitica ◽

Experimental Infection

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Ecological studies of Yersinia enterocolitica. III. Cross-protection against fecal excretion between Y. enterocolotica serovars 3 and 5.27 in pigs

Veterinary Microbiology ◽

10.1016/0378-1135(84)90007-5 ◽

1984 ◽

Vol 9 (4) ◽

pp. 383-389 ◽

Cited By ~ 7

Author(s):

H. Fukushima ◽

Y. Ito ◽

K. Saito ◽

M. Tsubokura ◽

K. Otsuki

Keyword(s):

Yersinia Enterocolitica ◽

Cross Protection ◽

Fecal Excretion ◽

Ecological Studies

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Serological and biochemical characteristics of virulence plasmid of Yersinia enterocolitica isolates from chicken in the Islamic Republic of Iran

Eastern Mediterranean Health Journal ◽

10.26719/2000.6.2-3.409 ◽

2000 ◽

Vol 6 (2-3) ◽

pp. 409-415

Author(s):

M. Motallebi

Keyword(s):

Human Serum ◽

Yersinia Enterocolitica ◽

Experimental Infection ◽

Virulence Plasmid ◽

Plasmid Curing ◽

Islamic Republic ◽

Biochemical Characteristics ◽

Calcium Dependency ◽

Islamic Republic Of Iran ◽

Pathogenic Yersinia

Pathogenic Yersinia enterocolitica harbour plasmid that is essential for virulence. We studied the characteristics of virulence plasmid using serological, biochemical and bioassay tests in Y. enterocolitica isolates of chicken using plasmid curing. Plasmid-cured isogenic derivatives [2029c and 2150c] were obtained from two isolates of Y. enterocolitica [RTCC 2029 and RTCC 2150]. The results demonstrated that plasmid-bearing isolates [2029 and 2150] were human-serum-resistant when grown at 37°C, but were sensitive when grown at 25°C, whereas plasmid-cured isolates [2029c and 2150c] were sensitive when grown at both temperatures. Also autoagglutination, calcium-dependency tests and experimental infection in mice demonstrated that these phenotypes were associated with the virulence plasmid

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