Abortion in mares can be a financially devastating event to horse owners and the equine industry. In this case report, we describe the gross, histopathological and microbiological findings associated with an abortion caused by Salmonella enterica subsp. arizonae, which should be considered in cases of abortion and metritis. Gross and histopathological evaluation of fetal and placental tissue were consistent with ascending septic placentitis resulting in fetal septicaemia. S. enterica subsp. arizonae was isolated from the placenta, lung and fetal gastric contents. Diagnosis was confirmed by MALDI-TOF MS. To our knowledge, this subspecies of S. enterica has not been previously reported as an isolate in a case of late-term equine abortion. A retrospective search of abortion cases at our institution was done, and no similar cases were identified for comparison. This case demonstrates S. enterica subsp. arizonae, although not previously reported as a cause of abortion in pregnant mares and uncommonly isolated from equids in the literature, may cause late-term abortions in susceptible animals. This pathogen should be considered in cases of abortion outbreaks on a farm and merits investigation of the carrier status of mares within a herd.

中文翻译：

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沙门氏菌肠道亚种。与亚利桑那州相关的母马流产

母马的堕胎对马主和马业来说可能是经济上的毁灭性事件。在本病例报告中，我们描述了与肠道沙门氏菌亚种引起的流产相关的大体、组织病理学和微生物学发现。arizonae，在流产和子宫炎的情况下应该考虑。胎儿和胎盘组织的大体和组织病理学评估与导致胎儿败血症的上行脓毒症胎盘炎一致。S. enterica subsp. 从胎盘、肺和胎儿胃内容物中分离出亚利桑那州。诊断由 MALDI-TOF MS 确认。据我们所知，这个S. enterica亚种以前没有报道过马科晚期流产病例中的分离株。对我们机构的堕胎案例进行了回顾性搜索，没有发现类似的案例进行比较。这个案例展示了S。 肠道亚种 亚利桑那州虽然以前没有作为怀孕母马流产的原因报道，并且在文献中很少从马科动物中分离出来，但可能会导致易感动物的晚期流产。在农场发生流产暴发的情况下应考虑这种病原体，并值得对群内母马的携带者状况进行调查。