Perfil de resistencia bacteriana de cepas de escherichia coli aisladas en heces de aves criadas en sistema intensivo y traspatio.

Abstract

This study focused on analyzing the bacterial resistance profile of Escherichia coli isolated from feces of poultry raised in both intensive and backyard systems, which is essential due to the growing concern about bacterial resistance in poultry production, susceptibility tests were carried out using double-disk antibiograms evaluating the response of strains to various antibiotics such as cefotaxime, ceftazidime trimethoprim with sulfamethoxazole, ciprofloxacin, gentamicin, cefepime, doxycycline, chloramphenicol, polymyxin B and imipenem, which allowed obtaining a complete picture of bacterial resistance in these production systems. In parallel, risk factors associated with bacterial resistance were identified, such as the type of production system, the use of antibiotics and contact with domestic animals and other animals, which is crucial to understand how these variables influence the development and spread of bacterial resistance. The chi-square statistical test was used to determine the significance of the associations between these factors and bacterial resistance, which provided scientific rigor to the analysis and allowed identifying relevant patterns in the data obtained. The results of the study revealed that Escherichia coli strains isolated from poultry raised in backyard systems had a higher prevalence of bacterial resistance compared to those from intensive systems, suggesting that the rearing environment plays a determining role in the observed resistance.