filariform larva

fi·lar·i·form lar·va

infective third-stage larva of the hookworm, Ascaris, and other nematodes with penetrating larvae or with larvae that migrate through the body to reach the intestine.
References in periodicals archive ?
A filariform larva is transmitted from the soil and penetrates into the skin.
Initial infestation occurs when the infectious form, the filariform larva, enters the human host through skin that was in contact with infected fecal material or contaminated soil.
1] The third stage or filariform larva is usually the stage that is infective to the definitive host.