Gasterophilus nasalis

Gasterophilus nasalis (also called throat bot fly or horse nasal bot fly[2]) is a species of the genus Gasterophilus and family Oestridae. This species is found worldwide, but prominently present within the summer months. This species of G. nasalis primarily targets equines, such as horses, donkeys and the plains zebra.[3] However, it's known that it targets cattle as well, along with mild cases of companion animals.

Throat bot fly
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Diptera
Family:
Oestridae
Genus:
Gasterophilus
Species:
G. nasalis
Binomial name
Gasterophilus nasalis

Life cycle

The eggs of the nose or lip botfly are laid and almost glued onto the hairs of the lip of bovine and caprinae species. These larvae do not require stimulation, but rather hatch themselves within 2-3 days and crawl into their host's mouth. The larvae will then embed and remain within either the tongue or the mucosa of the mouth for a duration of one month. After this duration they then pass into the animal's stomach where they attach to the mucosa in the first part of the small intestine. The larvae remain in the small intestine for a duration of 8-10 months until they are passed out in the feces and pupate in the soil for another 3-5 weeks until the adults emerge.

Treatment

If infected with G. nasalis there are treatments available. One of which consists of macrocyclis lactones (ivermectin) which can be administered as an injectable or a drench. These methods can provide around several weeks of protection against re-infestation.

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References
  1. "ITIS standard report - Gasterophilus nasalis (Linnaeus, 1758)". Integrated Taxonomic Information System. Retrieved 29 October 2018.
  2. "Horse Nasal Bot Fly - Gasterophilus nasalis (Linnaeus, 1758)". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 29 October 2018.
  3. 1. Colwell 2. Hall 3. Scholl, 1. Douglas D 2. Martin J. R. 3. Philip J. (April 24, 2006). The Oestrid Flies: Biology, Host-Parasite Relationships, Impact and Management. CABI. p. 302. ISBN 978-0851996844.

2. https://livestockvetento.tamu.edu/insectspests/bot-flies/

3. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/gasterophilus

4. http://parasitipedia.net/index.php?option=com_content&view=article&id=2554&Itemid=2832

5. https://www.merckvetmanual.com/respiratory-system/respiratory-diseases-of-sheep-and-goats/sheep-nose-bot


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