Experimental Sarcocystis hominis infection in a water buffalo (Bubalus bubalis)
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1Department of Biology, Yunnan University, Kunming City 650091, People's Republic of China. ydfzbjm@public.km.yn.cn
Abstract:
A water buffalo (Bubalus bubalis) was fed 5.0 x 10(5) Sarcocystis hominis sporocysts from a human volunteer who had ingested S. hominis cysts from naturally infected cattle. A necropsy was performed on the buffalo 119 days after inoculation, and a large number of microscopic sarcocysts (approximately 5,000/g) were found in skeletal muscles. Ultrastructurally, the sarcocyst wall from buffalo muscles has upright villar protrusions measuring about 5.6 x 0.8 microm with numerous microtubules that run from the base to the apex. Sarcocysts from this buffalo were infective to 2 human volunteers, confirming their identity as S. hominis. Therefore, we believe that buffaloes can act experimentally as the intermediate host for S. hominis.
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