{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:29:56Z","timestamp":1787027396636,"version":"build-2736575974"},"reference-count":83,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2025,7,29]],"date-time":"2025-07-29T00:00:00Z","timestamp":1753747200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100005825","name":"National Institute of Food and Agriculture","doi-asserted-by":"publisher","award":["2021-38821-34710"],"award-info":[{"award-number":["2021-38821-34710"]}],"id":[{"id":"10.13039\/100005825","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100005825","name":"National Institute of Food and Agriculture","doi-asserted-by":"publisher","award":["2022-67017-36982"],"award-info":[{"award-number":["2022-67017-36982"]}],"id":[{"id":"10.13039\/100005825","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Vet. Sci."],"abstract":"\n Introduction<\/jats:title>\n \n Cattle are well-recognized reservoirs of\n Salmonella<\/jats:italic>\n ; however, reports of atypical hydrogen sulfide (H\n 2<\/jats:sub>\n S)-negative strains from bovine sources remain scarce. This cross-sectional study aimed to investigate the antimicrobial resistance profiles and epidemiology of\n Salmonella<\/jats:italic>\n among rural cow-calf herds in Alabama, United States, with a particular focus on isolating emerging H\n 2<\/jats:sub>\n S-negative variants.\n <\/jats:p>\n <\/jats:sec>\n \n Method<\/jats:title>\n \n Between April and May 2024, a total of 311 fecal samples were collected from cattle across 18 farm operations in six counties. Samples were cultured for\n Salmonella<\/jats:italic>\n , and recovered isolates were identified using whole genome sequencing and the\n Salmonella In Silico<\/jats:italic>\n Typing Resource. H\n 2<\/jats:sub>\n S production was assessed using Xylose Lysine Deoxycholate agar, Lysine Iron Agar, and Triple Sugar Iron agar. Antimicrobial susceptibility testing was performed against 24 antimicrobial agents. A mixed-effects logistic regression model was used for statistical analysis.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Overall, 3.5% (11 out of 311) of animals from 27.8% (5 out of 18) of the farms tested positive for\n Salmonella<\/jats:italic>\n . Fifteen isolates representing six serovars were identified:\n Salmonella<\/jats:italic>\n Thompson (5 out of 15),\n Salmonella<\/jats:italic>\n Hadar (4 out of 15),\n Salmonella<\/jats:italic>\n Braenderup (3 out of 15),\n Salmonella<\/jats:italic>\n Enteritidis (1 out of 15),\n Salmonella<\/jats:italic>\n Bareilly (1 out of 15), and\n Salmonella<\/jats:italic>\n Typhimurium (1 out of 15). Notably, the\n tet(A)<\/jats:italic>\n gene conferring tetracycline resistance was detected exclusively in the\n Salmonella<\/jats:italic>\n Hadar isolates. Diarrheic animals were significantly more likely to shed\n Salmonella<\/jats:italic>\n in their feces (\n p<\/jats:italic>\n value = 0.0192). Importantly, the\n Salmonella<\/jats:italic>\n Typhimurium isolate was identified as an H\n 2<\/jats:sub>\n S-negative strain, carrying an A &gt; C missense mutation in the\n phsC<\/jats:italic>\n gene and a C &gt; T synonymous mutation in the\n cysI<\/jats:italic>\n gene.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n \n To our knowledge, this is the first report of an H\n 2<\/jats:sub>\n S-negative\n Salmonella<\/jats:italic>\n Typhimurium isolate from cattle feces. These findings also reveal a notable prevalence of\n Salmonella<\/jats:italic>\n shedding among an underexplored population of rural cow-calf herds in the southeastern United States. The potential public health implications of these findings merit further investigation.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.3389\/fvets.2025.1619880","type":"journal-article","created":{"date-parts":[[2025,7,29]],"date-time":"2025-07-29T04:10:28Z","timestamp":1753762228000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["Detection of a hydrogen sulfide-negative Salmonella Typhimurium from cattle feces in a cross-sectional study of cow\u2013calf herds in the Southeastern United States"],"prefix":"10.3389","volume":"12","author":[{"given":"Kingsley E.","family":"Bentum","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emmanuel","family":"Kuufire","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rejoice","family":"Nyarku","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chase","family":"Woods","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Khim","family":"Ale","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis","family":"McKie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"McKenzie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlene R.","family":"Jackson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abiodun","family":"Adesiyun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tony","family":"Opoku-Agyemang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Temesgen","family":"Samuel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gopal","family":"Reddy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Woubit","family":"Abebe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2025,7,29]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1412291","DOI":"10.3389\/fsci.2024.1412291","article-title":"Thinking beyond pathogen surveillance: building resilient biotech ecosystems to combat the next pandemic","volume":"2","author":"Crone","year":"2024","journal-title":"Front Sci"},{"key":"B2","volume-title":"Veterinary Epidemiologic Research. 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