The adult form of the parasite ---- is a fly, and the larval stage is an endoparasite.

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

The adult form of the parasite ---- is a fly, and the larval stage is an endoparasite.

Explanation:
The idea here is a parasite whose adult form is an insect (a fly) and whose larval stage lives inside the host as an endoparasite. Gasterophilus fits this pattern: the adult is a fly (the bot fly), and after the eggs hatch the larvae become internal parasites in the horse’s stomach, attaching to the mucosa as endoparasites. This contrasted with the others: Otobius is a tick, whose life stages are not a fly and its larvae are external parasites; Capillaria and Thelazia are nematodes with distinct life cycles and hosts, and their adult forms are not flies. Thus, the described life cycle points to Gasterophilus.

The idea here is a parasite whose adult form is an insect (a fly) and whose larval stage lives inside the host as an endoparasite. Gasterophilus fits this pattern: the adult is a fly (the bot fly), and after the eggs hatch the larvae become internal parasites in the horse’s stomach, attaching to the mucosa as endoparasites. This contrasted with the others: Otobius is a tick, whose life stages are not a fly and its larvae are external parasites; Capillaria and Thelazia are nematodes with distinct life cycles and hosts, and their adult forms are not flies. Thus, the described life cycle points to Gasterophilus.

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