Antiepidemic measures against ancylostomiasis and their efficiency in our conditions.

Coprological examinations were made in 358 foreigners, 51 of which (14.2%) were positive from the point of view of hookworm eggs presence. On the basis of the discovered infection prevalence, which is still high in foreigners arriving to the CSSR from the tropics and subtropics and on the basis of the new information about the developmental cycle of Ancylostoma duodenale the author recommends to alter the so far valid antiepidemic measures in the following sense: Persons should be regarded as parasitologically negative to hookworm infection, if their coprological examination is permanently negative within 40 weeks of their stay in the CSSR.