Martin D S, Desser S S
Department of Zoology, University of Toronto, Ontario, Canada.
J Parasitol. 1991 Jun;77(3):498-500.
Trypanosoma fallisi, a hemoflagellate infecting Bufo americanus from Ontario, was grown in vitro, and metatrypanosomes from the primary culture were inoculated into 4 uninfected test groups from 3 anuran families: Bufonidae, Hylidae, and Ranidae. In vitro-cultured T. fallisi was found to infect B. americanus and to induce transient infections in Bufo valliceps and Hyla versicolor. The flagellate was not infective to Rana clamitans. Trypanosoma ranarum was uninfective to the bufonids and hylids tested. These data suggest that the potential for host-switching decreases with increased evolutionary distance of the potential anuran host.
法氏锥虫是一种感染安大略省美洲蟾蜍的血鞭毛虫，它在体外培养，将原代培养物中的变锥虫接种到来自3个无尾目科（蟾蜍科、雨蛙科和蛙科）的4个未感染的试验组中。发现体外培养的法氏锥虫可感染美洲蟾蜍，并在牛蛙和变色雨蛙中引发短暂感染。这种鞭毛虫对绿蛙没有感染性。蛙锥虫对所测试的蟾蜍科和雨蛙科动物没有感染性。这些数据表明，潜在无尾目宿主的进化距离增加，宿主转换的可能性就会降低。
