Molecular characterization of Escherichia coli O157:H7 strains isolated from different sources and geographic regions
Journal of Veterinary Science
; : 139-144, 2012.
Article
em En
| WPRIM
| ID: wpr-174791
Biblioteca responsável:
WPRO
ABSTRACT
Escherichia (E.) coli serotype O157:H7 is a globally distributed human enteropathogen and is comprised of microorganisms with closely related genotypes. The main reservoir for this group is bovine bowels, and infection mainly occurs after ingestion of contaminated water and food. Virulence genetic markers of 28 O157:H7 strains were investigated and multilocus enzyme electrophoresis (MLEE) was used to evaluate the clonal structure. O157:H7 strains from several countries were isolated from food, human and bovine feces. According to MLEE, O157:H7 strains clustered into two main clonal groups designated A and B. Subcluster A1 included 82% of the O157:H7 strains exhibiting identical MLEE pattern. Most enterohemorrhagic E. coli (EHEC) O157:H7 strains from Brazil and Argentina were in the same MLEE subgroup. Bovine and food strains carried virulence genes associated with EHEC pathogenicity in humans.
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Texto completo:
1
Índice:
WPRIM
Assunto principal:
Argentina
/
Virulência
/
Brasil
/
Marcadores Genéticos
/
Doenças dos Bovinos
/
Regulação Bacteriana da Expressão Gênica
/
Reação em Cadeia da Polimerase
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Escherichia coli O157
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Toxina Shiga I
/
Toxina Shiga II
Limite:
Animals
/
Humans
País/Região como assunto:
America do sul
/
Argentina
/
Brasil
Idioma:
En
Revista:
Journal of Veterinary Science
Ano de publicação:
2012
Tipo de documento:
Article