Biotypes and O serogroups of Escherichia coli involved in intestinal infections of weaned rabbits: clues to diagnosis of pathogenic strains.

摘要: A total of 575 Escherichia coli strains isolated from weaned rabbits experiencing diarrhea in 119 French commercial farms were tested for O serogroups. The results showed a strong predominance serogroup O103 strains. sample 126 further checked simplified biotypes by using five carbohydrate fermentation reactions. Of 72 strains, 70 shown to belong characterized rhamnose-negative reaction. Four nine O68 also this type Thirty-nine representative the serotypes and found, experimental pathogenicity antibiotic susceptibility. All produced life-threatening watery or hemorrhagic diarrhea, whereas rhamnose-positive induced only mild diarrheic syndrome without any mortality no clinical signs at all. Rhamnose-negative, highly pathogenic did not related antibiotypes. We think that serogrouping together with biotyping, even rhamnose testing, may be an important clue diagnosis enteropathogenic France, permitting rapid identification leading improved prognosis treatment.