Gauly M, Krauthahn C, Bauer C, Erhardt G
Department of Animal Breeding and Genetics, University of Giessen, Germany.
J Vet Med B Infect Dis Vet Public Health. 2001 Nov;48(9):665-73. doi: 10.1046/j.1439-0450.2001.00493.x.
The faeces of 14 Rhön lambs were examined every second day between 7 and 99 days of age for the presence of Eimeria oocysts. Eimeria absata, E. bakuensis, E. faurei, E. granulosa, E. intricata, E. ovinoidalis, E. pallida, E. parva and E. crandallis/weybridgensis were identified. The predominant species were E. ovinoidalis, E. parva, E. crandallis/weybridgensis and E. bakuensis. Using a statistical model, the oocyst excretion rate was described as a sequence of periods with decreasing levels and varying length ('excretion periods') interrupted by intervals with no or very low oocyst counts. Several variables could be deduced from these two parameters, including the length of an excretion period and the maximum output during an excretion period. Thc estimated repeatability for oocyst counts for the different species ranged from 0.05 to 0.41. This result provides a starting point for possible genetic selection based on faecal oocyst counts of Rhön sheep for resistance to Eimeria infections.
在14只罗恩羔羊7至99日龄期间，每隔一天对其粪便进行检查，以确定是否存在艾美耳球虫卵囊。鉴定出了阿氏艾美耳球虫、巴库艾美耳球虫、法氏艾美耳球虫、颗粒艾美耳球虫、复杂艾美耳球虫、卵形艾美耳球虫、苍白艾美耳球虫、小艾美耳球虫以及克兰德利斯/韦布里奇艾美耳球虫。优势种类为卵形艾美耳球虫、小艾美耳球虫、克兰德利斯/韦布里奇艾美耳球虫和巴库艾美耳球虫。通过统计模型，卵囊排泄率被描述为一个水平逐渐降低且长度各异的时期序列（“排泄期”），期间被卵囊数量极少或无卵囊的间隔期打断。从这两个参数可以推导出几个变量，包括排泄期的长度以及排泄期内的最大排泄量。不同种类卵囊计数的估计重复性在0.05至0.41之间。这一结果为基于罗恩绵羊粪便卵囊计数进行抗艾美耳球虫感染的遗传选择提供了一个起点。
