The hamster pinworms ''Syphacia mesocricetus'', ''syphacia obvelata'' and ''syphacia muris'' are capable of inflicting heavy parasitic loads, although incidence of infection is low. Transmisson of infection occurs through ova ingetion and the eggs have also been shown to aerosolise increasing potential infection risks.
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Heavy parasitic loads may lead to rectal prolapse or perianal irritation. Macroscopic pathology will show thickened GI tract and pinworms are recognised as white hair-like nematodes in the cecum.