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Roy M. Robins-browne - One of the best experts on this subject based on the ideXlab platform.

  • Pathogenicity of Yersinia enterocolitica biotype 1A.
    FEMS Immunology & Medical Microbiology, 2003
    Co-Authors: Sharon M. Tennant, Travis Grant, Roy M. Robins-browne
    Abstract:

    Yersinia enterocolitica strains of biotype 1A lack the known virulence determinants of strains in other categories, including the Yersinia virulence plasmid (pYV), and several chromosomal markers of pathogenicity. For this reason, and also because Y. enterocolitica strains of biotype 1A are frequently isolated from the environment or asymptomatic individuals, these bacteria are often assumed to be avirulent. On the other hand, there is a considerable body of clinical, epidemiological and experimental evidence to indicate that at least some strains of Y. enterocolitica biotype 1A are able to cause gastrointestinal symptoms which resemble those caused by pYV-bearing strains. The availability of a number of experimental systems, including cell culture and animal models of infection, provides an opportunity to identify and characterise the essential virulence determinants of biotype 1A strains.

S. Pongolini - One of the best experts on this subject based on the ideXlab platform.

  • Detection, virulence and antimicrobial resistance of Yersinia enterocolitica in bulk tank milk in Italy
    International Dairy Journal, 2018
    Co-Authors: S. Bonardi, A.s. Le Guern, Cyril Savin, G. Pupillo, L. Bolzoni, M. Cavalca, S. Pongolini
    Abstract:

    In 2016 and 2017, 509 raw milk samples were collected from bulk milk tanks in 315 dairy farms in Parma province, Italy. Yersinia pseudotuberculosis was never detected. Yersinia enterocolitica was isolated from 17 (3.1%) bulk milk samples by culture methods. Estimated apparent prevalence was 3.91% in 2016, and 2.63% in 2017, with no significant difference between the two years (df ¼ 1; p-value ¼ 0.419). Five BT 2/ O:5,27 and 12 BT 1A isolates were detected. The most common virulence genes (ail, inv, virF, yadA, ystA, ystB, myfA, irp2, fyuA) were screened and the genes ail, virF, yadA, ystA were harboured only by 2 O:5,27 isolates. The Italian strains were very close by SNP analysis. The 2 O:5,27 isolates showed a unique antimicrobial resistance pattern, being resistant to amoxicillin, cefoxitin, cephalexin and amoxicillin-clavulanic acid. The study suggests that consumption of raw or improperly pasteurised milk may be hazardous for the consumers.

S B Lyss - One of the best experts on this subject based on the ideXlab platform.

  • Yersinia enterocolitica infections associated with improperly pasteurized milk products southwest pennsylvania march august 2011
    Epidemiology and Infection, 2014
    Co-Authors: A H Longenberger, M P Gronostaj, G Y Yee, L M Johnson, J F Lando, R E Voorhees, Kirsten Waller, Andre Weltman, Maria Moll, S B Lyss
    Abstract:

    In July 2011, a cluster of Yersinia enterocolitica infections was detected in southwestern Pennsylvania, USA. We investigated the outbreak's source and scope in order to prevent further transmission. Twenty-two persons were diagnosed with yersiniosis; 16 of whom reported consuming pasteurized dairy products from dairy A. Pasteurized milk and food samples were collected from this dairy. Y. enterocolitica was isolated from two products. Isolates from both food samples and available clinical isolates from nine dairy A consumers were indistinguishable by pulsed-field gel electrophoresis. Environmental and microbiological investigations were performed at dairy A and pasteurization deficiencies were noted. Because consumption of pasteurized milk is common and outbreaks have the potential to become large, public health interventions such as consumer advisories or closure of the dairy must be implemented quickly to prevent additional cases if epidemiological or laboratory evidence implicates pasteurized milk as the outbreak source.

Anja Siitonen - One of the best experts on this subject based on the ideXlab platform.

  • the ail gene is present in some Yersinia enterocolitica biotype 1a strains
    Foodborne Pathogens and Disease, 2011
    Co-Authors: Leila M Sihvonen, Kaisa Haukka, Saija Hallanvuo, Mikael Skurnik, Anja Siitonen
    Abstract:

    One chromosomal virulence marker of Yersinia is the gene ail, which encodes Ail, an outer membrane protein that promotes attachment and invasion. A high correlation has been found between the ail gene and the virulence of Yersinia. Here, we report two Yersinia enterocolitica biotype 1A strains that are usually nonpathogenic and carry the ail gene. The ail gene sequences of biotype 1A strains displayed similarity to the bioserotype 1B/O:8 strain 8081. The finding suggests that ail-based detection methods for Y. enterocolitica alone are insufficient to detect real pathogenic strains.

  • symptoms and sources of Yersinia enterocolitica infection a case control study
    WOS, 2010
    Co-Authors: Elisa Huovinen, Leila M Sihvonen, Mikko J Virtanen, Kaisa Haukka, Anja Siitonen, Markku Kuusi
    Abstract:

    Background Yersinia enterocolitica (YE) is the causative agent of yersiniosis. YE encompass strains of diverse pathogenicity: YE biotypes 1B and 2-5 are considered pathogenic, whereas biotype 1A is in general considered nonvirulent. Also YE-like species, which can sometimes be misidentified as YE, are considered nonvirulent.

Jugsharan Singh Virdi - One of the best experts on this subject based on the ideXlab platform.