Woo P, Soltys M A, Gillick A C
Can J Comp Med. 1970 Apr;34(2):142-7.
Trypanosomes were found in the blood of 155 out of 274 Holstein cows of various ages from southern Ontario. The incidence varied from about 8% in one herd to about 85% in another herd. Two species of trypanosomes were found in cattle in the Guelph area. One was Trypanosoma theileri. The other was a much smaller trypanosome which morphologically resembles T. uniforme of the Salivaria. This is the first report of such a trypanosome in cattle in North America. Epimastigotes from blood agar slants of both trypanosomes, when inoculated into chick embryos, produced blood forms morphologically identical to those found in the blood of the cows. T. theileri survived at least two weeks in blood kept at 4-5 degrees C.
在安大略省南部不同年龄的274头荷斯坦奶牛中，有155头牛的血液中发现了锥虫。发病率在一个牛群中约为8%，在另一个牛群中约为85%。在圭尔夫地区的牛中发现了两种锥虫。一种是泰勒氏锥虫。另一种是小得多的锥虫，形态上类似于唾液锥虫属的均匀锥虫。这是北美首次关于牛体内这种锥虫的报道。将两种锥虫血琼脂斜面培养的上鞭毛体接种到鸡胚中后，产生的血内型在形态上与在奶牛血液中发现的相同。泰勒氏锥虫在4-5摄氏度保存的血液中至少存活两周。
