{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T13:23:41Z","timestamp":1793021021897,"version":"4.5.0"},"reference-count":180,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,12,15]],"date-time":"2025-12-15T00:00:00Z","timestamp":1765756800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"German Federal Ministry of Research and Education","award":["01KI2202A"],"award-info":[{"award-number":["01KI2202A"]}]},{"name":"Open Access funds of Freie Universit\u00e4t Berlin","id":[{"id":"https:\/\/ror.org\/046ak2485","id-type":"ROR","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Background\/Objectives: Antimicrobial resistance (AMR) threatens global public health. This systematic review and meta-analysis, as part of the \u201cENVIRE\u201d project (interventions to control the dynamics of antimicrobial resistance from chickens through the environment), assesses the prevalence of phenotypic and genotypic resistance, including extended-spectrum beta-lactamases (ESBLs), AmpC beta-lactamases, carbapenemases, colistin, and fluoroquinolone resistance, in broiler chickens and their environment. Methods: The analysis covers the years 2002\u20132022, focusing on Escherichia (E.) coli, Klebsiella spp., Enterobacter spp., and Citrobacter spp. in fecal, meat, environmental, and other-than-feces samples from observational studies published in PubMed and Web of Science. Quality assessment was performed using the Alberta Heritage Foundation criteria. Results: Data from 170 studies, conducted in Europe, North Africa, and North America, were included. The most frequently studied resistance was to beta-lactam, with focus on ESBL-producing and AmpC beta-lactamase isolates. The pooled prevalence of ESBL-resistant E. coli observed in meat samples at 41% and in fecal samples at 38% demonstrated significant heterogeneity between the studies. The negative binomial regression analysis of prevalence data revealed significantly higher ESBL-producing E. coli rates in European meat samples compared to North African samples. Conclusions: This systematic review revealed substantial variation in prevalence and emphasizes the need for standardized surveillance systems and robust study designs.<\/jats:p>","DOI":"10.3390\/antibiotics14121268","type":"journal-article","created":{"date-parts":[[2025,12,15]],"date-time":"2025-12-15T15:15:08Z","timestamp":1765811708000},"page":"1268","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Antimicrobial Resistance in Selected Enterobacteriaceae from Broilers and Their Environment: ESBL, AmpC, Carbapenemases, Colistin, and Fluoroquinolone Resistance\u2014A Systematic Review and Meta-Analysis"],"prefix":"10.3390","volume":"14","author":[{"given":"Julia von","family":"Kiparski","sequence":"first","affiliation":[{"name":"Institute of Veterinary Epidemiology and Biostatistics, Veterinary Centre for Resistance Research, School of Veterinary Medicine, Freie Universit\u00e4t Berlin, 14163 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nunzio","family":"Sarnino","sequence":"additional","affiliation":[{"name":"Institute of Veterinary Epidemiology and Biostatistics, Veterinary Centre for Resistance Research, School of Veterinary Medicine, Freie Universit\u00e4t Berlin, 14163 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diana","family":"Vargas","sequence":"additional","affiliation":[{"name":"Institute for Animal Hygiene and Environmental Health, Veterinary Centre for Resistance Research, School of Veterinary Medicine, Freie Universit\u00e4t Berlin, 14163 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1825-4688","authenticated-orcid":false,"given":"Aleksandra","family":"Atanasova","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8688-2926","authenticated-orcid":false,"given":"Roswitha","family":"Merle","sequence":"additional","affiliation":[{"name":"Institute of Veterinary Epidemiology and Biostatistics, Veterinary Centre for Resistance Research, School of Veterinary Medicine, Freie Universit\u00e4t Berlin, 14163 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,12,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2857","DOI":"10.1080\/10408398.2015.1077192","article-title":"Antimicrobial resistance: A global emerging threat to public health systems","volume":"57","author":"Ferri","year":"2017","journal-title":"Crit. 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