pán wěi sī chóng
Onchocerca volvulus, the filarial parasite worm causing "river blindness" or onchocerciasis, the second most common cause of blindness in humans
pán wěi sī chóng zhèng
"river blindness" or onchocerciasis, the second most common cause of blindness in humans, caused by the filarial parasite worm Onchocerca volvulus
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