Hooshmand-Rad P, Svensson C, Uggla A
Department of Parasitology, National Veterinary Institute, Uppsala, Sweden.
Vet Parasitol. 1994 May;53(1-2):23-32. doi: 10.1016/0304-4017(94)90013-2.
Four groups of three conventionally reared 2-month-old bull calves were inoculated with 10 million to 400 million sporulated oocysts of Eimeria alabamensis isolated from Swedish calves which had diarrhoea while at pasture. Their appetite, clinical condition, growth rate and the dry matter content of their faeces were compared with those of three similar but uninoculated calves. The prepatent period was 6-8 days, and the period during which large numbers of oocysts were excreted was 2-7 days. In two of the inoculated calves only a slight softening of the faeces was observed. The other ten calves developed watery diarrhoea, had a poor appetite and appeared depressed. The clinical signs were most severe in the calves which received the highest doses and included signs of abdominal pain and a reluctance to rise. The growth rates of the infected calves were significantly reduced for 18 days after inoculation, and 71 days after inoculation they had not compensated for this period of reduced growth rate.
将四组每组三头常规饲养的2月龄公牛犊接种1000万至4亿个从瑞典犊牛分离出的阿拉巴马艾美耳球虫的孢子化卵囊，这些瑞典犊牛在放牧时出现腹泻。将它们的食欲、临床状况、生长速度和粪便干物质含量与三头相似但未接种的犊牛进行比较。潜隐期为6 - 8天，大量卵囊排出期为2 - 7天。在两头接种的犊牛中，仅观察到粪便稍有变软。其他十头犊牛出现水样腹泻、食欲不佳且神情萎靡。临床症状在接受最高剂量接种的犊牛中最为严重，包括腹痛迹象和不愿起身。接种后18天内，感染犊牛的生长速度显著降低，接种71天后，它们仍未弥补这段生长速度降低的时期。
