蟠尾丝虫症
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
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