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The preparation Molevac Pyrvinium Pamoat-suspension produced by Parke Davis, Comp., was used in a single dose 5.0 ml./10 kg of body weight in 283 children in whom in 25 per cent of them were isolated by the use of the NIH method eggs of Enterobius vermicularis. In the control examination after 7 days eggs were not found. After 6 months among the 120 children, 8 were infected. However, this may be...