Mites - Guinea Pigs
Trixacarus caviae also known as – Guinea Pig Scabies — Mange is the most common mite in guinea pigs.
Any guinea pig may be affected, however the mites may remain latent for several months, with stress or underlying disease precipitating the development of clinical signs. Transmission occurs via direct contact or transfer from fomites.
Intense pruritus, which can cause convulsions when handled is the main presenting sign. Alopecia, scaling, hyperkeratosis and severe dermatitis is seen, over the shoulders, neck and inner thighs in particular. Secondary infection may occur.
Deep skin-scrapings (to the level of capillary ooze) and microscopic examination for identification of the mite.
Weekly Ivermectin treatment for 3 for weeks. This may not be effective.
The environment should be thoroughly disinfected and bedding replaced. Any predisposing stresses or diseases should be identified and treated.
Chirodiscoides caviae is the main species that affects guinea pigs. It is an elongated ovoid mite that lives in the fur.
Infection is normally asymptomatic unless there is a heavy infestation. The clinical signs associated with a heavy infestation include pruritus, alopecia and excoriation, particularly over the trunk. As the mite is a fur mite, the skin is generally unaffected unless damaged by self trauma.
Mites are easily identified following examination of hair plucks.
Weekly Ivermectin treatment for 3 for weeks.
Bond, Hendricks, Loeffler (2009) Veterinary Dermatology RVC Intergrated BVetMed Course, Royal Veterinary College
Merck & Co (2009) The Merck Veterinary Manual (Ninth Edition), Merial
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