ArticleBrazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]2026
Frequency and characterization of β-lactam-resistant Escherichia coli from wild birds from Marmara Region in Turkey.
Article in Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology], 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study aimed to phenotypically and genotypically detect beta-lactam-resistant Escherichia coli in the feces of wild and migratory birds residing in or passing through the Marmara Region during seasonal migration. A total of 272 fresh fecal samples were non-invasively collected and grouped as follows: (1) resident wild waterfowl, (2) resident urban birds (e.g., pigeons, crows, sparrows), (3) migratory birds overwintering in Turkey, and (4) migratory birds staying during spring and summer. Samples were cultured on MacConkey agar with and without cefotaxime (1 mg/L). Carbapenem resistance was assessed using the Modified Hodge Test; none of the 212 isolates tested positive. Among the 272 birds sampled, 62 (22.8%) carried ESBL and/or AmpC producing isolates. Antimicrobial-resistant E. coli were identified in 59 of 272 birds (21.7%), including 47 ESBL-positive, 6 AmpC-positive, and 5 harboring both resistance types. Group 1 (mainly gulls) showed the highest resistance rates. PCR analysis revealed that among 84 isolates, 48 carried only beta-lactamase genes, 3 only AmpC genes, and 5 both. Detected genes included: bla
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