SciELO - Scientific Electronic Library Online

vol.13 issue2Effect of different esters of estradiol used to synchronize ovulation on pregnancy rate to FTAI in Angus heifersEvaluation of a mouse infection model to evaluate homologue and heterologue vaccines against Brucella canis in mouse model author indexsubject indexarticles search
Home Pagealphabetic serial listing  


On-line version ISSN 1668-3498


CARLONI, G.; PEREYRA, A.; DENAMIEL, G  and  GENTILINI, E.. Antimicrobial resistance of Escherichia coli isolated from animals. InVet [online]. 2011, vol.13, n.2, pp. 47-51. ISSN 1668-3498.

Antimicrobial susceptibility tests were determined in 100 isolates of E.coli from differents patologies in cattle, horses, dogs and cats, according to Clinical and Laboratory Standards Institute. Multiresistance isolates were detected in this assay. The antibiotics selected were amikacin, ampicillin /sulbactam, cefotaxime, ciprofloxacin, chloramphenicol, colistin, gentamicin, nitrofurantoin, streptomycin, tetracycline, trimethoprim/sulfamethoxazole. The antibiotic with the highest resistance was tetracycline (34% in cats and 75% in dogs). In isolated strains from dogs and cats it was also found considerable percentages of resistance to ampicilline/ sulbactam (27% in dogs and 53%in cats) and to ciprofloxacine (30%in dogs and 67% in cats). In these isolates it was also found the highest percentage of multiresistance (29% in dogs and 67% in cats). Selective pressure originated from the inadecuate use of antibiotics can be responsible for the appearance of resistance, eventhough it is not the only one. It may be possible that E. coli could transmit genes of resistance to antimicrobials agents, although it is unknown if the presence of these genes are permanent or transitory.

Keywords : Antimicrobials; Resistance; E.coli..

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License