Abstract
Mice with a natural infection of Syphacia obvelata and Aspiculuris tetraptera were continuously medicated with 0·1% thiabendazole in the diet. No oxyurids were found in test animals after 24 days of treatment though control animals remained infected. Growth rates in treated animals increased. 2 generations of mice were studied and, although overall production fell by 1·45%, the use of this drug in total eradication of the worms is suggested.