期刊
JOURNAL OF VETERINARY INTERNAL MEDICINE
卷 29, 期 1, 页码 307-310出版社
WILEY
DOI: 10.1111/jvim.12480
关键词
Ammonia; Encephalopathy; Enteritis; Infectious disease; Miniature horse
Background: Equine coronavirus (ECoV) is associated with clinical disease in adult horses. Outbreaks are associated with a low case fatality rate and a small number of animals with signs of encephalopathic disease are described. Objectives: The aim of this study is to describe the epidemiological and clinical features of two outbreaks of ECoV infection that were associated with an high case fatality rate. Animals: 14 miniature horses and 1 miniature donkey testing fecal positive for ECoV from two related disease outbreaks. Methods: Retrospective study describing the epidemiological findings, clinicopathological findings, and fecal viral load from affected horses. Results: In EcoV positive horses, 27% (4/15) of the animals died or were euthanized. Severe hyperammonemia (677 mu mol/L, reference range <= 60 mu mol/L) was identified in one animal with signs of encephalopathic disease that subsequently died. Fecal viral load (ECoV genome equivalents per gram of feces) was significantly higher in the nonsurvivors compared to animals that survived (P =.02). Conclusions and Clinical Importance: Equine coronavirus had a higher case fatality rate in this group of miniature horses than previously reported in other outbreaks of varying breeds. Hyperammonemia could contribute to signs of encephalopathic disease, and the fecal viral load might be of prognostic value in affected horses.
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