{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T05:10:52Z","timestamp":1789708252072,"version":"4.0.1"},"reference-count":29,"publisher":"Korea Disease Control and Prevention Agency","issue":"1","license":[{"start":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T00:00:00Z","timestamp":1770681600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["ophrp.org"],"crossmark-restriction":true},"short-container-title":["PHRP"],"published-print":{"date-parts":[[2026,2,28]]},"abstract":"<jats:p>Objectives: In May 2025, clusters of salmonellosis were identified in seven cities in the Republic of Korea, all associated with consumption of identical bakery products. This investigation aimed to characterize the outbreak, identify potential contributing factors, and inform strategies for preventing similar multi-facility foodborne outbreaks.Methods: A case series study was conducted among individuals who consumed Manufacturer H\u2019s Product I and Product II on May 15\u201316, 2025 at seven facilities (n=1,235). Clinical specimens from symptomatic individuals, retained food samples, and environmental samples were collected and tested. Food-exposure histories were assessed, and active case finding was implemented across all supplied facilities. Traceback investigations were conducted at the manufacturer, distributor, and egg farms. Human and food isolates underwent pulsed-field gel electrophoresis (PFGE) and whole-genome sequencing (WGS).Results: A total of 323 cases met the outbreak case definition (attack rate, 26.2%), of which 48 were laboratory-confirmed. Salmonella Enteritidis was isolated from both clinical specimens and retained bakery products. PFGE patterns were indistinguishable between human and food isolates, and WGS demonstrated high genetic relatedness. These findings confirmed a common-source outbreak linked to the implicated bakery products.Conclusion: This outbreak underscores the value of integrating epidemiological investigation, active case finding, and molecular typing to identify common food vehicles in outbreaks involving widely distributed manufactured foods. Coordinated collaboration between public health and food safety authorities is essential for the effective detection, response, and prevention of multi-facility foodborne outbreaks.<\/jats:p>","DOI":"10.24171\/j.phrp.2025.0467","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T04:41:38Z","timestamp":1770698498000},"page":"61-71","update-policy":"https:\/\/doi.org\/10.24171\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A multi-city outbreak of Salmonella Enteritidis infections linked to bakery products, Republic of Korea"],"prefix":"10.24171","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2014-9833","authenticated-orcid":true,"given":"Da Seul","family":"Kim","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4881-4890","authenticated-orcid":true,"given":"Soon-Young","family":"Seo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3181-0917","authenticated-orcid":true,"given":"Dong Hwi","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-9957-2207","authenticated-orcid":true,"given":"Yeon Hee","family":"Woo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-0790-890X","authenticated-orcid":true,"given":"Deborah","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-8656-3579","authenticated-orcid":true,"given":"Se Jeong","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3368-291X","authenticated-orcid":true,"given":"Junyoung","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4555-5096","authenticated-orcid":true,"given":"Eunkyung","family":"Shin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-0352-0753","authenticated-orcid":true,"given":"Byungsun","family":"Jung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7224-2410","authenticated-orcid":true,"given":"Eunmi","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9759-0355","authenticated-orcid":true,"given":"Min Jung","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5971-7829","authenticated-orcid":true,"given":"Young-Joon","family":"Park","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"31909","reference":[{"key":"ref1","volume-title":"Salmonella (non-typhoidal) [Internet]","year":"2018"},{"key":"ref2","volume-title":"Measures for the control of non-typhoidal Salmonella spp. in poultry meat: meeting report. Microbiological Risk Assessment Series No. 45 [Internet]","year":"2023"},{"key":"ref3","volume-title":"","year":"2025"},{"key":"ref4","volume-title":"Salmonella infection (Salmonellosis) [Internet]","year":"2024"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1017\/s0950268818000079"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1017\/s095026880005737x"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.aje.a116449"},{"key":"ref8","volume-title":"Infectious disease statistics portal [Internet]","year":"2025"},{"key":"ref9","volume-title":"Annual report on infectious disease surveillance [Internet]","year":"2025"},{"key":"ref10","first-page":"17","volume-title":"Waterborne and foodborne disease outbreaks in the Republic of Korea, 2023","author":"Hwang","year":"2025"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1017\/s0950268804002778"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.3201\/eid3107.250043"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1001\/jama.289.5.540"},{"key":"ref14","first-page":"107","volume-title":"","year":"2018"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.15585\/mmwr.mm6834a5"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1016\/j.jfp.2025.100519"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1016\/s0033-3549(04)50103-6"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.5365\/WPSAR.2010.1.1.001"},{"key":"ref19","volume-title":"Summary of possible multistate enteric disease outbreaks, 2017-2020 [Internet]","year":"2024"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.3390\/foods14081410"},{"key":"ref21","volume-title":"Whole genome sequencing for foodborne disease surveillance: landscape paper [Internet]","year":"2018"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.15585\/mmwr.mm7221a4"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1016\/j.foodcont.2024.110733"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1016\/j.jfp.2024.100360"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.3109\/00365549709008662"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.4315\/0362-028x-67.12.2735"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.2903\/sp.efsa.2017.en-1353"},{"key":"ref28","volume-title":"Multi-country outbreak of Salmonella Enteritidis sequence type (ST)11 infections linked to poultry products in the EU\/EEA and the United Kingdom [Internet]","year":"2021"},{"key":"ref29","doi-asserted-by":"publisher","DOI":"10.2903\/sp.efsa.2022.en-7180"}],"container-title":["Osong Public Health and Research Perspectives"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/ophrp.org\/upload\/pdf\/j-phrp-2025-0467.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/ophrp.org\/journal\/view.php?doi=10.24171\/j.phrp.2025.0467","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/ophrp.org\/upload\/pdf\/j-phrp-2025-0467.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T04:27:29Z","timestamp":1772166449000},"score":1,"resource":{"primary":{"URL":"http:\/\/ophrp.org\/journal\/view.php?doi=10.24171\/j.phrp.2025.0467"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,2,28]]},"references-count":29,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,2]]}},"URL":"https:\/\/doi.org\/10.24171\/j.phrp.2025.0467","relation":{},"ISSN":["2210-9099","2233-6052"],"issn-type":[{"value":"2210-9099","type":"print"},{"value":"2233-6052","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,2,28]]},"assertion":[{"value":"2025-10-23","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-01-04","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-02-10","order":2,"name":"published","label":"Published online","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-02-28","order":3,"name":"published","label":"Print publication","group":{"name":"publication_history","label":"Publication History"}}]}}