Case report on an outbreak of theileriosis in a dairy herd: Could it be a co-infection of a virulent strain of Theileria mutans with Theileria parva?

D. F. Tarusikirwa, D. N. Ndhlovu, T. Hove
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Abstract

This case report aimed to alert veterinarians of the possibility of simultaneous infections with more than one Theileria species in cattle herds in Zimbabwe. Cows (N=7) and a postmortem specimen from a dairy farm located in Chivhu, Mashonaland East province, Zimbabwe were presented for clinical and postmortem examination, respectively. On history taking, the herd had a decrease in milk yield and high cow mortalities. The presented live animals had a heavy tick burden and were febrile and lethargic. Post-mortem findings revealed strong evidence suggestive of theileriosis. Theileria schizonts and piroplasms were identified in stained lymph node aspirate, impression, and blood smears. The herd was managed using tetracyclines and buparvaquone together with an intensive dipping protocol until deaths had stopped. Both the clinical and postmortem findings were strongly suggestive of the possibility of a simultaneous infection with more than one Theileria species in this herd. Thus, these finding highlight the need to characterise the Theileria species profile in Zimbabwe.
在一个奶牛群中爆发的沙门氏菌病病例报告:这可能是一种毒力强的变异沙门氏菌与细小沙门氏菌的共同感染吗?
本病例报告旨在提醒兽医注意在津巴布韦的牛群中可能同时感染一种以上的希勒菌。奶牛(N=7)和来自津巴布韦马绍纳兰省东部奇夫胡的一个奶牛场的死后标本分别进行临床和死后检查。从历史上看,畜群的产奶量下降,奶牛死亡率高。呈递的活动物有沉重的蜱虫负担,并有发热和昏睡。验尸结果显示了强有力的证据,表明他们患有肌肉肥大症。在染色的淋巴结抽吸、印模和血涂片中发现裂裂菌和梨状质。使用四环素和布巴伐酮以及强化浸泡方案对鹿群进行管理,直到死亡停止。临床和尸检结果都强烈提示,该群中可能同时感染一种以上的伊氏杆菌。因此,这些发现突出表明,有必要对津巴布韦的Theileria物种概况进行特征描述。
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