Lice Infestation

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Lice and mites are the most common external parasites of guinea

pigs.  Lice are tiny, wingless, flattened insects that live

within the haircoat.  Both the adults and their eggs are found

attached to individual hairs.



Guinea pigs may be parasitized by two types of biting lice.  Both

abrade the skin surface and feed on the body fluids that exude

through the very superficial wounds they create.



Light infestations usually go unnoticed.  Heavy infestations are

usually accompanied with excessive itching, scratching and some

hair loss.  Scabs may also be evident on and around the ears.



A veterinarian can confirm the diagnosis by direct examination of

the haircoat.  Direct examination is usually all that is

necessary, though use of a microscope is very helpful.  The

veterinarian will usually prescribe an insecticidal shampoo to

treat affected guinea pigs.



Lice can be transmitted by direct and intimate contact between

infested and uninfested guinea pigs.  Therefore, pet guinea pigs

are very unlikely to harbor these parasites unless they are

recent acquisitions that were previously in contact with

louse-infested guinea pigs.  Established pet guinea pigs could

also be infested by being placed in close contact with new,

infested guinea pigs.  Guinea pig lice do not parasitize people.