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Researchers utilizing parturient domestic ruminants, including sheep, have an increased risk of occupational exposure. This study evaluated the effectiveness of our screening protocol in eliminating C. burnetii\u2013positive sheep from our facility. From August 2010 to May 2018, all ewes ( N\u2009\u2009=\u2009\u2009306) and select lambs ( N\u2009\u2009=\u2009\u2009272; ovis aries) were screened twice for C. burnetii utilizing a serum Phase I and Phase II antibody immunofluorescence assay (IFA). The first screen was performed by the vendor prior to breeding, and the second screen was performed on arrival to the research facility. Ewes that were positive on arrival screening were quarantined and retested using repeat IFA serology, enzyme-linked immunosorbent assay, buffy coat polymerase chain reaction (PCR), and amniotic fluid PCR. The overall individual seroprevalence of C. burnetii in the flocks tested by the vendor was 14.2%. Ewes with negative Phase I and Phase II IFA results were selected for transport to the research facility. Upon arrival to the facility, two (0.7%) ewes had positive Phase I IFA results. Repeat testing demonstrated seropositivity in one of these two ewes, though amniotic fluid PCR was negative in both. The repeat seropositive ewe was euthanized prior to use in a research protocol. No Q fever was reported among husbandry, laboratory or veterinary staff during the study period. Serologic testing for C. burnetii with IFA prior to transport and following arrival to a research facility limits potential exposure to research staff.<\/jats:p>","DOI":"10.1177\/0023677220965628","type":"journal-article","created":{"date-parts":[[2020,10,28]],"date-time":"2020-10-28T01:35:55Z","timestamp":1603848955000},"page":"170-176","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":4,"title":["Minimizing the risk of occupational Q fever exposure: A protocol for ensuring\n                    <i>Coxiella burnetii<\/i>\n                    \u2013negative pregnant ewes are used for medical research"],"prefix":"10.1177","volume":"55","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0069-8870","authenticated-orcid":false,"given":"Laura A","family":"Galganski","sequence":"first","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Benjamin A","family":"Keller","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Connor","family":"Long","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaeli J","family":"Yamashiro","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1544-8572","authenticated-orcid":false,"given":"Mennatalla S","family":"Hegazi","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher D","family":"Pivetti","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"},{"name":"School of Veterinary Medicine, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Linda A","family":"Talken","sequence":"additional","affiliation":[{"name":"Office of Research: Campus Veterinary Services, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gary W","family":"Raff","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Diana L","family":"Farmer","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bruno B","family":"Chomel","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Betty","family":"Ma","sequence":"additional","affiliation":[{"name":"Office of Research: Campus Veterinary Services, University of California, Davis, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2020,10,27]]},"reference":[{"key":"bibr1-0023677220965628","doi-asserted-by":"publisher","DOI":"10.1128\/CMR.12.4.518"},{"key":"bibr2-0023677220965628","first-page":"1","volume":"62","author":"Anderson A","year":"2013","journal-title":"MMWR Recomm Rep"},{"key":"bibr3-0023677220965628","doi-asserted-by":"publisher","DOI":"10.1007\/s00404-015-3958-9"},{"key":"bibr4-0023677220965628","doi-asserted-by":"publisher","DOI":"10.1086\/514698"},{"key":"bibr5-0023677220965628","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199402033300518"},{"key":"bibr6-0023677220965628","doi-asserted-by":"publisher","DOI":"10.1016\/j.rvsc.2003.09.001"},{"key":"bibr7-0023677220965628","volume-title":"Epidemiology of Q fever. 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