Forslid Anna, Christensson Dan, Dahl Jan, Grandi Giulio, Enemark Jörg M D
Skånemejerier, SE 205 03 Malmö, Sweden.
Department of Microbiology, National Veterinary Institute, SE 751 89 Uppsala, Sweden.
Vet Parasitol Reg Stud Reports. 2015 Dec;1-2:16-20. doi: 10.1016/j.vprsr.2016.02.004. Epub 2016 Feb 21.
Bovine eimeriosis is a common, globally distributed infection in housed calves aged from 3 to 12weeks. To date, no national prevalence study revealing the occurrence and distribution of Eimeria species under Swedish environmental and farming conditions has been performed. This study revealed the excretion of Eimeria bovis or Eimeria zuernii (alone or together) in 23% of all sampled calves (N=541) and 61% of all herds (N=99). The number of tested calves was critical for whether positive calves were detected or not. Nine other Eimeria species were identified, the most frequently reported being Eimeria ellipsoidalis (9% and 35% of positive calves and herds, respectively) and Eimeria auburnensis (4% and 19% of positive calves and herds, respectively). Not all calves shedding oocysts had diarrhoea and not all diarrhoeic calves shedded oocysts. Based on these present findings, Swedish cattle practitioners should include bovine eimeriosis as a relevant differential diagnosis to other common gastrointestinal pathogens in 3 to 12weeks old calves with diarrhoea or unthrifty calves without diarrhoea. When testing a herd for bovine eimeriosis, a sufficient number of faecal samples, i.e. 10 or more samples, should be examined to obtain a reliable picture of the infection status in a given farm.
牛艾美球虫病是一种常见的、在全球范围内流行的疾病，感染对象为3至12周龄的圈养犊牛。迄今为止，尚未开展过全国性的患病率研究来揭示瑞典环境和养殖条件下艾美球虫种类的发生和分布情况。本研究发现，在所有采样犊牛（N = 541）中有23%以及所有牛群（N = 99）中有61%排出了牛艾美球虫或阿氏艾美球虫（单独或同时排出）。检测的犊牛数量对于是否能检测到阳性犊牛至关重要。还鉴定出了其他9种艾美球虫，其中最常报告的是椭圆艾美球虫（分别占阳性犊牛和牛群的9%和35%）和奥本艾美球虫（分别占阳性犊牛和牛群的4%和19%）。并非所有排出卵囊的犊牛都腹泻，也并非所有腹泻的犊牛都排出卵囊。基于目前的这些发现，瑞典的养牛从业者应将牛艾美球虫病作为3至12周龄腹泻犊牛或无腹泻但发育不良犊牛的其他常见胃肠道病原体的相关鉴别诊断疾病。在检测牛群是否感染牛艾美球虫病时，应检查足够数量的粪便样本，即10个或更多样本，以便可靠了解特定农场的感染状况。
