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Type: Artigo de periódico
Title: Virulence related characteristics of Escherichia coli from sows with Mastitis-Metritis-Agalactia (MMA) syndrome
Author: Takagi, M
Amorim, CRN
Ferreira, H
Yano, T
Abstract: Virulence related biological characteristics of thirty Escherichia coli strains isolated from sows with Mastitis-Metritis-Agalactia (MMA) syndrome were examined. Eighteen (60%) E. coli strains agglutinated with guinea pig RBC in the absence of D-mannose. Eleven strains possessed type 1 fimbria, as shown by seroagglutination tests. None of the E. coli strains expressed P1 and F165 fimbrial antigens. None of them produced enterotoxins (STa, STb and LT1), cytotoxins (VTs and CNFs) or were hemolytic (alpha and enterohemolysin). Seventeen E. coli strains produced aerobactin and fourteen produced colicin V. Twenty-five isolates were serum resistant. None of the isolates adhered to pig kidney cells (SK6, PK15 and C17) or to HeLa cells. These results suggest that the pathogenicity of these E. coli strains is multifactorial and further molecular studies are required to determine markers of virulence in MMA-E. coli.
Subject: Escherichia coli
virulence factors
Mastitis-Metritis-Agalactia (MMA) syndrome
Country: Brasil
Editor: Soc Brasileira Microbiologia
Rights: aberto
Date Issue: 1997
Appears in Collections:Unicamp - Artigos e Outros Documentos

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