title: Quinolone resistance in potentially pathogenic and non-pathogenic Escherichia coli strains isolated from healthy ruminants.
abstract: Quinolone resistance was studied in potentially pathogenic and non-pathogenic Escherichia coli strains from healthy ruminants. In cattle, 5.9% of the strains were resistant to nalidixic acid and 4.9% were resistant to enrofloxacin and ciprofloxacin, whereas in sheep and goats only 0.5% and 1.4%, respectively, of the strains were resistant to nalidixic acid and none to fluoroquinolones. Most of the strains resistant to quinolones were non-pathogenic strains isolated from cattle. However, the results of this study do not show that the potentially pathogenic E. coli strains isolated from healthy ruminants are more susceptible to quinolones than the non-pathogenic E. coli strains.
authors.affiliation: Departamento de Patología Animal I, Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain.
authors.forename: J A
authors.initials: JA
authors.lastname: Orden
authors.forename: J A
authors.initials: JA
authors.lastname: Ruiz-Santa-Quiteria
authors.forename: D
authors.initials: D
authors.lastname: Cid
authors.forename: R
authors.initials: R
authors.lastname: Díez
authors.forename: S
authors.initials: S
authors.lastname: Martínez
authors.forename: R
authors.initials: R
authors.lastname: de la Fuente
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000494:pharmacology*; D002417:Cattle; D002939:Ciprofloxacin / Q000494:pharmacology; D000077422:Enrofloxacin; D004926:Escherichia coli / Q000187:drug effects* / Q000302:isolation & purification / Q000472:pathogenicity; D024841:Fluoroquinolones; D006041:Goats; D008826:Microbial Sensitivity Tests; D009268:Nalidixic Acid / Q000494:pharmacology; D015363:Quinolones / Q000494:pharmacology; D012418:Ruminants / Q000382:microbiology; D012756:Sheep
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D015363:Quinolones; D009268:Nalidixic Acid; D000077422:Enrofloxacin; D002939:Ciprofloxacin