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To identify the source of contaminations, clinical and environmental samples were cultured for Listeria monocytogenes. Isolates were serotyped and analyzed using pulsed-field gel electrophoresis (PFGE). Listeria monocytogenes (serotype 1) was recovered from the brain of a male lamb with clinical signs of listerial encephalitis. Isolates of serotypes 1 and 4 were also cultured from feces of clinically healthy lambs, compost piles, and soybean cleanings. By PFGE, the clinical isolate was distinctly different from the other isolates. Environmental isolates were identified as L. monocytogenes serotypes 1 and 4. However, by PFGE, none matched the profile of the single clinical isolate. Thus, the ultimate source of contamination is unknown.<\/jats:p>","DOI":"10.1177\/104063870201400407","type":"journal-article","created":{"date-parts":[[2011,5,12]],"date-time":"2011-05-12T16:20:37Z","timestamp":1305217237000},"page":"314-321","source":"Crossref","is-referenced-by-count":17,"title":["A Case Report of Sporadic Ovine Listerial Menigoencephalitis in Iowa with an Overview of Livestock and Human Cases"],"prefix":"10.1177","volume":"14","author":[{"given":"Irene V.","family":"Wesley","sequence":"first","affiliation":[{"name":"Pre-Harvest Food Safety and Enteric Diseases Research Unit, National Animal Disease Center, USDA, Agricultural Research Service, Ames, IA 50010 (Wesley)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David J.","family":"Larson","sequence":"additional","affiliation":[{"name":"Veterinary Diagnostic Laboratory, Iowa State University, Ames, IA 50011"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karen M.","family":"Harmon","sequence":"additional","affiliation":[{"name":"Veterinary Diagnostic Laboratory, Iowa State University, Ames, IA 50011"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John B.","family":"Luchansky","sequence":"additional","affiliation":[{"name":"Food Research Institute, University of Wisconsin, 1925 Willow Drive, Madison, WI 53711"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann Ramos","family":"Schwartz","sequence":"additional","affiliation":[{"name":"Food Safety Net Services, Ltd., San Antonio, TX 78216"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2002,7,1]]},"reference":[{"key":"bibr1-104063870201400407","volume-title":"Veterinary investigation diagnosis and analysis II.","author":"Anonymous","year":"1988"},{"key":"bibr2-104063870201400407","unstructured":"Audurier A, Gitter M, Raoult A: 1986, Phage typing of\n                      Listeria\n                      strains isolated by the veterinary investigation centers in Great Britain from 1981\u20131984. 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