[Giardia infections in humans]

A short report is given on the importance of the infections of people by Giardia lamblia with special consideration of epidemiological and immunological aspects. Results of the investigations of children from different day-care centres in large town also proved interactions with pathogenic and apathogenic bacteria. The prevalence in children with diarrhoea was up to 50% contrary to children without diarrhoea (up to 14%). Adults were infected with Giardia lamblia up to 3%. Environmental investigations of the sources of infection had negative results.