A 2-month-old Thoroughbred filly was referred to Hagyard Equine Medical Institute for further evaluation of acute pyrexia and a suspected intra-abdominal abscess based on abdominal ultrasonography performed in the field. Initial examination revealed bilateral uveitis, polysynovitis, a large internal abdominal abscess and pneumonia. A transtracheal wash confirmed the presence of a multi-sensitive strain of Rhodococcus equi. Anaemia and thrombocytopenia were noted during hospitalisation. Results of a Coombs test were consistent with an immune-mediated haemolytic process. Recurrent pyrexia, abdominal discomfort and severe respiratory distress unresponsive to intensive medical support motivated euthanasia followed by necropsy after 30 days of treatment. Overall, six extra-pulmonary disorders were simultaneously diagnosed despite the lack of pulmonary pyogranulomas.

中文翻译：

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2 个月大的小马驹与马红球菌感染相关的多种肺外疾病

一头 2 个月大的纯种母马被转诊到 Hagyard 马医学研究所，根据在野外进行的腹部超声检查，进一步评估急性发热和疑似腹腔内脓肿。初步检查显示双侧葡萄膜炎、多滑膜炎、腹腔内大脓肿和肺炎。经气管冲洗证实存在马红球菌多敏感菌株. 住院期间出现贫血和血小板减少症。Coombs 试验的结果与免疫介导的溶血过程一致。反复发热、腹部不适和严重呼吸窘迫对强化医疗支持无反应，导致安乐死，治疗 30 天后进行尸检。总体而言，尽管没有肺脓肿，但同时诊断出 6 种肺外疾病。