Bots (Gasterophilus)

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Bots infect horses in many parts of the country. They have a very interesting life cycle with the adults resembling a honeybee. The larva in the stomach look similar to many free-living grubs.

These larva attach to the lining of the stomach and cause a very small ulcer. When there is a heavy infection these ulcers may join to form a large ulcer. There are indications that if the ulcer is large enough it may cause colic.

Specimen Photos/Illustrations