Alaska Department of Fish and Game
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Parasites and Diseases
A Field Guide
TO COMMON WILDLIFE DISEASES
AND PARASITES IN ALASKA
|What causes nose bots?|
- This condition is caused by the larvae of the bot fly.
- Lifecycle: The adult female bot fly deposits larvae in the nostrils of caribou. Nose bot larvae attach and grow in a cluster in the caribou’s throat near the base of the tongue. The larvae are sneezed out in the spring.
|Where are nose bots found?|
- Nose bots can be found in caribou throughout their range in Alaska.
|What are the signs of nose bots?|
- Caribou usually appear healthy.
- When laying their eggs, bot flies harass caribou and interfere with feeding.
- Nose bot larvae are found in the sinuses and airways at the back of the throat.
- The worm-like larvae are white when they begin to develop but grow to ¾ to 1½ inches in length over the winter and become yellowish-brown.
|How can I protect myself?|
- You cannot be infected by nose bot flies or their larvae.
|Can I eat the meat?|
- Meat from affected animals is suitable for human consumption.
|Samples to collect|