{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T12:13:40Z","timestamp":1792671220139,"version":"4.5.0"},"reference-count":83,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2024,5,16]],"date-time":"2024-05-16T00:00:00Z","timestamp":1715817600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001321","name":"NRF Incentive","doi-asserted-by":"publisher","award":["118949"],"award-info":[{"award-number":["118949"]}],"id":[{"id":"10.13039\/501100001321","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Rapid growth in commercial poultry production is one of the major sources of Salmonella infections that leads to human salmonellosis. The two main Salmonella enterica serovars associated with human salmonellosis are enteritidis and typhimurium. The aim of this study was to determine the prevalence of S. enterica serovars Enteritidis and S. Typhimurium as well as their Salmonella pathogenicity islands (SPI) and antibiotic resistance profiles in broiler chicken feces from slaughterhouses. A total of 480 fecal samples from broiler chickens that were grouped into 96 pooled samples were identified to have Salmonella spp. using the invA gene, whilst the Spy and sdfI genes were used to screen for the presence of S. Enteritidis and S. Typhimurium serovars, respectively, by polymerase chain reaction (PCR) assays. The isolates were also screened for the presence of Salmonella pathogenicity islands (SPIs) using PCR. The disc diffusion assay was performed to determine the antibiotic resistance profiles of the isolates. A total of 36 isolates were confirmed as Salmonella spp. through amplification of the invA gene. Out of 36 confirmed Salmonella spp. a total of 22 isolates were classified as S. Enteritidis (n = 8) and were S. Typhimurium (n = 14) serovars. All (n = 22) S. Enteritidis and S. Typhimurium isolates possessed the hilA (SPI-1), ssrB (SPI-2) and pagC (SPI-11) pathogenicity islands genes. Amongst these serovars, 50% of the isolates (n = 11\/22) were resistant to tetracycline and nalidixic acid. Only 22% of the isolates, S. Typhimurium (13.6%) and S. Enteritidis (9.1%) demonstrated resistance against three or more antibiotic classes. The most detected antibiotic resistance genes were tet(K), mcr-1, sulI and strA with 13 (59.1%), 9 (40.9%), 9 (40.9%) and 7 (31.8%), respectively. The findings of this study revealed that S. Typhimurium is the most prevalent serotype detected in chicken feces. To reduce the risk to human health posed by salmonellosis, a stringent public health and food safety policy is required.<\/jats:p>","DOI":"10.3390\/antibiotics13050458","type":"journal-article","created":{"date-parts":[[2024,5,16]],"date-time":"2024-05-16T06:44:31Z","timestamp":1715841871000},"page":"458","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Detection of Salmonella Pathogenicity Islands and Antimicrobial-Resistant Genes in Salmonella enterica Serovars Enteritidis and Typhimurium Isolated from Broiler Chickens"],"prefix":"10.3390","volume":"13","author":[{"given":"Tsepo","family":"Ramatla","sequence":"first","affiliation":[{"name":"Centre for Applied Food Safety and Biotechnology, Department of Life Sciences, Central University of Technology, 1 Park Road, Bloemfontein 9300, South Africa"},{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6238-1695","authenticated-orcid":false,"given":"Ntelekwane G.","family":"Khasapane","sequence":"additional","affiliation":[{"name":"Centre for Applied Food Safety and Biotechnology, Department of Life Sciences, Central University of Technology, 1 Park Road, Bloemfontein 9300, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lungile N.","family":"Mlangeni","sequence":"additional","affiliation":[{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8251-5176","authenticated-orcid":false,"given":"Prudent","family":"Mokgokong","sequence":"additional","affiliation":[{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taole","family":"Ramaili","sequence":"additional","affiliation":[{"name":"Department of Animal Health, School of Agriculture, North-West University, Mmabatho 2735, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4894-2246","authenticated-orcid":false,"given":"Rendani","family":"Ndou","sequence":"additional","affiliation":[{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jane S.","family":"Nkhebenyane","sequence":"additional","affiliation":[{"name":"Centre for Applied Food Safety and Biotechnology, Department of Life Sciences, Central University of Technology, 1 Park Road, Bloemfontein 9300, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8895-3620","authenticated-orcid":false,"given":"Kgaugelo","family":"Lekota","sequence":"additional","affiliation":[{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0700-4787","authenticated-orcid":false,"given":"Oriel","family":"Thekisoe","sequence":"additional","affiliation":[{"name":"Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"187","DOI":"10.3389\/fcimb.2019.00187","article-title":"S. 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