Giardiasis is one of the most common helminthic infestations in the world. The problem of giardiasis is also very relevant for Uzbekistan. In Uzbekistan, among parasitic diseases, giardiasis accounts for a large proportion (60-70%) of children in organized children’s groups [1-5]. The discussion about the pathogenicity of Giardia, which lasted for a long time, can be said to have ended with the recognition of their damaging effect on the villi of the intestinal epithelium, where they vegetate [10]. According to the conclusion of the WHO expert group, Lamblia intestinalis should be considered a pathogenic protozoan [6-9].