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Medical Term:

Probstymayria vivipara

Pronunciation: prob′sti-mā′rē-ă vi-vip′ă-ră

Definition: A nematode (family Atractidae) closely related to the true pinworms (family Oxyuridae) and still commonly considered the horse pinworm; it is distributed worldwide and is found often in tremendous numbers, because of internal autoreinfection, in the colon of horses and other equids.