[Formol-gasoline concentration technique for eggs and cysts (author's transl)].

Modification of the formol-ether concentration technique was made by substituting gasoline for ether and omitting Triton from the formula. Parallel examination of hundred (100) stool samples by the original and by the modified technique resulted in identical distribution of negative, light, medium and heavy positive slides. The same samples examined by the direct smear and by the Kato's technique gave lower rates of positives. The modified technique is useful in laboratories with limited material resources.