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The study aimed to isolate APEC strains from broiler farms in Brazil and assess their antimicrobial resistance profiles.

February 24, 2025PoultryOpen Access

Virulence and Antimicrobial Resistance of Avian Pathogenic Escherichia coli (APEC) Isolates from Poultry in Brazil

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The study aimed to isolate APEC strains from broiler farms in Brazil and assess their antimicrobial resistance profiles.
126 E. coli isolates were obtained from chickens with colibacillosis and analyzed using species-specific qPCR targeting uspA gene and five virulence factor genes.
AMR was assessed using the disk diffusion method with ten antibiotics commonly used in Brazilian poultry.
Both APEC and AFEC isolates were examined for antimicrobial resistance patterns.
109 (86.5%) isolates were identified as APEC.
Resistance was notably high for amoxicillin (67.4%) and ceftiofur (57.1%).
41 (32.5%) isolates exhibited a multidrug resistance profile.

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Randomized trial reveals high antimicrobial resistance in APEC isolates from poultry, suggesting urgent intervention is needed.

Lúcio et al. (2025) studied this question.

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