EN
The studies were carried out in several stages during the time-span of 1956-1960. In the first stage attention was paid to qualitative and quantitative incidence of flies in the neighbourhood of human dwelling - places, farms, animal and slaughter houses; the second phase was concerned with the incidence of flies in the flats of various Prague regions; in the third phase, alimentary for the presence of Enterobacteriacae; the fourth step involved the migration of Musca domestica from the animal to human dwelling places.