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This report provides the first descriptions of severe necrosuppurative chorionitis with vasculitis, and fetal pyelonephritis and enteritis in late-term abortions of maiden ewes. Chlamydial infection was detected using a Chlamydia genus-specific qPCR (quantitative polymerase chain reaction) on tissue extracts from 3 fetuses. C. pecorum was identified using a targeted qPCR assay, which also determined infectious load within fetal tissues. The presence of viable C. pecorum in fetal samples was confirmed by cell culture. Multilocus sequence typing (MLST) data indicated that the C. pecorum strains from each fetus were identical and of sequence type (ST) 23. Chlamydia sp. immunohistochemistry showed strong positive immunolabeling of fetoplacental lesions. Other infectious abortigenic agents were excluded with specific testing. This report confirms C. pecorum as a likely cause of ovine abortion and provides the first descriptions of associated fetoplacental lesions in naturally infected sheep.<\/jats:p>","DOI":"10.1177\/0300985820967451","type":"journal-article","created":{"date-parts":[[2020,11,18]],"date-time":"2020-11-18T05:59:40Z","timestamp":1605679180000},"page":"114-122","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":13,"title":["<i>Chlamydia pecorum<\/i>\n                    \u2013Associated Sporadic Ovine Abortion"],"prefix":"10.1177","volume":"58","author":[{"given":"Thomas","family":"Westermann","sequence":"first","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cheryl","family":"Jenkins","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily","family":"Onizawa","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sarah","family":"Gestier","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Justine","family":"McNally","sequence":"additional","affiliation":[{"name":"North West Local Land Services, Moree, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"Kirkland","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Zhang","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel","family":"Bogema","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leah K.","family":"Manning","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keith","family":"Walker","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9210-6026","authenticated-orcid":false,"given":"Pedro","family":"Pinczowski","sequence":"additional","affiliation":[{"name":"Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2020,11,18]]},"reference":[{"key":"bibr1-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1002\/9780470753316.ch16"},{"key":"bibr2-0300985820967451","doi-asserted-by":"publisher","DOI":"10.4081\/ijas.2007.s2.875"},{"issue":"1","key":"bibr3-0300985820967451","first-page":"61","volume":"8","author":"Bakhtiari NM","year":"2018","journal-title":"Iran J Appl Sci"},{"issue":"5","key":"bibr4-0300985820967451","first-page":"288","volume":"9","author":"Baratil S","year":"2017","journal-title":"Iran J Microbiol"},{"key":"bibr5-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1007\/BF01250067"},{"key":"bibr6-0300985820967451","doi-asserted-by":"publisher","DOI":"10.7717\/peerj.4296"},{"key":"bibr7-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1177\/0300985817751218"},{"key":"bibr8-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetmic.2014.04.022"},{"key":"bibr9-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1053\/jcpa.2002.0573"},{"key":"bibr10-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1016\/j.parint.2014.11.008"},{"key":"bibr11-0300985820967451","doi-asserted-by":"publisher","DOI":"10.1016\/j.mcp.2005.09.003"},{"key":"bibr12-0300985820967451","unstructured":"Fowler DG. 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