Yabe J, Phiri I K, Phiri A M, Chembensofu M, Dorny P, Vercruysse J
Paraclinical Studies Department, School of Veterinary Medicine, The University of Zambia, PO Box 32379, Lusaka, Zambia.
J Helminthol. 2008 Dec;82(4):373-6. doi: 10.1017/S0022149X08054904. Epub 2008 Oct 15.
This study investigated interactions among Fasciola gigantica, Schistosoma spp. and Amphistomum spp. concurrent natural infections in Zambian cattle, based on egg and worm counts. In the abattoir 315 cattle were screened for worms of F. gigantica in the liver, Schistosoma spp. in mesenteric veins and/or Amphistomum spp. in the rumen. One hundred and thirty-three (42.2%) of the abattoir-examined cattle harboured one, two or all three trematodes. Of 133 cattle, 50 were randomly selected for worm and egg counts. The mean numbers (+/- SD) of Amphistomum, Schistosoma and Fasciola were 622.08 (+/- 97.87), 33.68 (+/- 7.44) and 19.46 (+/- 4.58), respectively. A total of 32% harboured all the three trematodes, 66% had F. gigantica and Amphistomum spp. infections, 52% had Schistosoma spp. and Amphistomum spp. infections while 32% had F. gigantica and Schistosoma infections. A positive correlation (P = 0.014) was found between F. gigantica and Amphistomum worm burdens. There were no correlations between Amphistomum and Schistosoma worm burdens and between F. gigantica and Schistosoma worm burdens. It may be concluded that there is no significant cross-protection among these trematodes in cattle in endemic areas.
本研究基于虫卵计数和虫体计数，调查了赞比亚牛同时感染巨片形吸虫、血吸虫属和双口吸虫属之间的相互作用。在屠宰场，对315头牛进行了检查，以确定其肝脏中是否存在巨片形吸虫、肠系膜静脉中是否存在血吸虫属以及瘤胃中是否存在双口吸虫属。在接受检查的屠宰场牛中，133头（42.2%）感染了一种、两种或所有三种吸虫。在这133头牛中，随机挑选了50头进行虫体和虫卵计数。双口吸虫、血吸虫和片形吸虫的平均数量（±标准差）分别为622.08（±97.87）、33.68（±7.44）和19.46（±4.58）。共有32%的牛感染了所有三种吸虫，66%感染了巨片形吸虫和双口吸虫属，52%感染了血吸虫属和双口吸虫属，32%感染了巨片形吸虫和血吸虫。巨片形吸虫和双口吸虫的虫体负荷之间存在正相关（P = 0.014）。双口吸虫和血吸虫的虫体负荷之间以及巨片形吸虫和血吸虫的虫体负荷之间没有相关性。可以得出结论，在流行地区的牛中，这些吸虫之间没有显著的交叉保护作用。
