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| Ferreira,Rita C. C.; Neto,Armando A. B.; Fracalanzza,Sérgio E. L.; Costa,Sérgio O. P.; Almeida,D. F.; Ferreira,Luís C. S.. |
| The electrophoretic profiles of penicillin binding proteins (PBPs) and outer membrane proteins (OMPs) of Yersinia pestis EV 76 were determined following in vivo growth in diffusion chambers implanted in the peritoneal cavity of mice. In contrast to Y. pestis grown under in vitro conditions which activate the low calcium response (LCR) regulon there was no significant qualitative or quantitative change of the PBP profile of Y. pestis cells during growth in diffusion chambers for up to 72 h following implantation in mice. Three OMPs, with molecular weight of 100, 60 and 58 kDa, were expressed in Y. pestis cells grown for 24 h, but not at 48 h or at 72 h, in diffusion chambers. These results indicate that growth of Y. pestis in intraperitoneal diffusion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yersinia pestis; PBP; In vivo growth; OMP. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300005 |
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| Leal,Elida A.; Moreira,Josimar D.; Nunes,Fernanda F.; Souza,Larissa R.; Martins,Janaina M.; Toledo,Vicente P.C.; Almeida,Alzira M.P.; Guimarães,Tania M.P.. |
| ABSTRACT Objectives: The plague, which is an infectious disease caused by Yersinia pestis, still threatens many populations in several countries. The worldwide increase in human plague cases and the potential use of the bacteria as a biological weapon reinforce the need to study the immunity that is induced by potential vaccine candidates. To determine the immunogenicity of antigenic preparations based on the F1 protein and the total extract from Y. pestis, we assessed the role of these antigens in inducing an immune response. Methods: The immunogenicity of antigenic preparations based on the Y. pestis (YP) total extract and the Y. pestis fraction 1 capsular antigen protein (F1) was determined in Swiss-Webster mice immunized with 40 µg or 20 µg for each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yersinia pestis; Antigens; Mice; Immune response; Vaccines. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000600620 |
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| Feng,Na; Zhou,Yazhou; Fan,Yanxiao; Bi,Yujing; Yang,Ruifu; Zhou,Yusen; Wang,Xiaoyi. |
| ABSTRACT We developed a loop-mediated isothermal amplification (LAMP) assay for the detection of Y. pestis by targeting the 3a sequence on chromosome. All 11 species of the genus Yersinia were used to evaluate the specificity of LAMP and PCR, demonstrating that the primers had a high level of specificity. The sensitivity of LAMP or PCR was 2.3 or 23 CFU for pure culture, whereas 2.3 × 104 or 2.3 × 106 CFU for simulated spleen and lung samples. For simulated liver samples, the sensitivity of LAMP was 2.3 × 106 CFU, but PCR was negative at the level of 2.3 × 107 CFU. After simulated spleen and lung samples were treated with magnetic beads, the sensitivity of LAMP or PCR was 2.3 × 103 or 2.3 × 106 CFU, whereas 2.3 × 105 or 2.3 × 107 CFU for magnetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plague; Yersinia pestis; Loop-mediated isothermal amplification; Magnetic beads. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100128 |
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