Gasterophilus haemorrhoidalis

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Gasterophilus haemorrhoidalis
Waerbeas rectom moulet.JPG
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Oestridae
Genus: Gasterophilus
Species: G. haemorrhoidalis
Binomial name
Gasterophilus haemorrhoidalis

Oestrus haemorrhoidalis Linnaeus 1758

In rectum of a mule with anal prolpase

Gasterophilus haemorrhoidalis (also called nose botfly) is a species of the genus Gasterophilus that lays eggs on the lips and around the mouth of horses, mules and donkeys, but also reindeer.

In Equidae, third-stage larvae attach to the stomach, but also to the rectum, sometimes in great numbers. [1] Heavy infestation can cause anal prolapse in foals and mules.

In reindeer, the larvae grow in the sinuses and throat of the host animal and are sneezed out in the spring.

They do not parasitise humans.

External links[edit]


  1. ^ Johannes Kaufmann, Parasitic Infections of Domestic Animals, Birkhäuser Verlag, Basel, Boston, Berlin, 1996, ISBN 3-7643-5115-2.