作者: James C. Chubb , Daniel Benesh , Geoff A. Parker
关键词:
摘要: Grazing mammals, ungulates, pose two evolutionary puzzles as helminth hosts. First, why do some helminths infect intermediate hosts prior to infecting given that grazers could directly consume propagules on vegetation? Second, ungulates are large and long-lived, so they occasionally instead of definitive hosts, in taeniid cestodes? We comprehensively surveyed life cycles transmission involving ungulates. identified six routes found ungulate parasitism has evolved 25 times. Direct egg is rare, we suggest this due a barrier caused by faecal avoidance. Our survey confirmed almost always discuss the exceptional cases when not.