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|Type:||Artigo de periódico|
|Title:||Virulence factors of avian Escherichia coli associated with swollen head syndrome|
|Abstract:||Virulence characteristics of 50 strains of Escherichia coli isolated from chickens with swollen head syndrome were examined. The results were the following: in the absence of D-mannose, 74% of strains agglutinated guinea pig erythrocytes, but in the presence of D-mannose 32% agglutinated guinea-pig erythrocytes and 62% agglutinated human erythrocytes. when slide agglutination assays were carried out with antisera to adhesin of bovine and swine origin (K88, K99, F41, F42 987P and 2134P), only 14% of strains agglutinated with antiserum to F41. Colicin V was produced by 78% of the E. coli strains and 80% produced aerobactin. In the serum resistance test, 36 (72%) of strains showed resistance to normal chicken serum. Only seven (14%) strains expressed K1 capsular antigen, while motility was found in 62% of the strains.|
|Editor:||Carfax Publ Co|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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