Eradication of the pinworm Syphacia obvelata from an animal unit by anthelmintic therapy.

Thiabendazole incorporated in the diet at a rate of 0.1%, fed to all animals over a period of 3 months, successfully eliminated the parasite from the colony. Samples taken 12 months after treatment were still negative for the parasite. During the period between the discovery of the organism and the preparation of the diet a course of piperazine citrate was administered at a rate of 2 g/litre in the drinking water in order to limit the spread of the infection.