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. 2003 Jul;71(7):4175-7.
doi: 10.1128/IAI.71.7.4175-4177.2003.

Virulence factors and clonal relationships among Escherichia coli strains isolated from broiler chickens with cellulitis

Benito Guimarães de Brito  1 , Luiz Carlos J Gaziri, Marilda C Vidotto
Affiliations

Virulence factors and clonal relationships among Escherichia coli strains isolated from broiler chickens with cellulitis

Benito Guimarães de Brito et al. Infect Immun. 2003 Jul.

Abstract

In this study, we compared Escherichia coli isolates from chickens with avian cellulitis with those from feces of healthy chickens. Cellulitis-derived strains presented phenotypic and genotypic characteristics of greater virulence than did the fecal isolates. Phylogenetic analysis by repetitive extragenic palindromic-PCR showed that, in agreement with their virulence characteristics, the cellulitis isolates form two clonal groups distinct from the fecal isolates.

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Figures

FIG. 1.
FIG. 1.
Dendrogram of E. coli isolates from chickens with cellulitis (strains 1 to 12) and from feces of healthy chickens (strains 13 to 20) based on simple matching similarity coefficients, calculated from REP-PCR analysis data. The virulence factors, lethality (Leth), and cellulitis index (C.I.) of each isolate are also shown. NP, not pathogenic; LP, low pathogenicity; IP, intermediate pathogenicity; HP, high pathogenicity.
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