Comportamiento de los principales antibióticos usados en avicultura frente a cepas respiratorias de E. Coli en pollos de engorde del municipio de Floridablanca (Santander – Colombia).

Abstract

The intention of this study is to contribute with information about the behavior of antibiotics to respiratory strains of E. coli, used in poultry production. With a representative sample of five birds by shed, cultures and antibiograms were made for the 5 most commonly used antibiotics in poultry production: Enrofloxacine, Norfloxacine, Ciprofloxacine, Phosphomicine and Trimetoprim-sulphametoxazol. 511 bacterial isolates were made by means of cotton tracheal swap in broiler chickens of 3 to 5 weeks of age with respiratory symptoms. As a result, 88.7% of the isolates corresponded to E. coli stocks, and the remaining 11.3% to other bacteria. When carrying out the antibiograms on E. coli isolates, the findings show that 42.1% were resistant to Ciprofloxacine, followed by Norfloxacine with 46.4%, Enrofloxacine with 62.5%, Phosphomicine with 66.9%, and 78.1% to Trimetoprim-sulphametoxazol. Of all the isolates of E. coli, 78% were considered as being resistant to more than one antibiotic. Additionally, 23.8% of the samples showed resistance to the 5 antibiotics under study, which eliminated any possibility of treatment, while just 2.3% of the cases presented sensitivity to all the antibiotics.

Keywords:

E. coli

resistencia

antibióticos

aislamientos bacterianos

síntomas respiratorios

antibiograma

E. coli

resistance

antibiotics

bacterial isolates

respiratory symptoms

antiobiogram

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