Yīshēng zài xiǎnwēijìng xià guānchá dào le yīndào máodīchóng.
The doctor observed Trichomonas vaginalis under the microscope.
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Medical/clinical term. Parses as 阴道 (vagina) + 毛滴虫 (flagellate trichomonad, lit. 'hair-drip worm' referring to its flagella). Use in medical writing; everyday speech refers to the infection as 滴虫病.