Our first experience in genotyping Giardia from Moscow residents, has shown that 4 and 2 of seven samples belong to G. duodenalis genotype A and genotype B, respectively; one sample was negative during amplification with two types of primers. Genotyping was Carried out using the specific primers TPIA and TPIB to the gene encoding for the enzyme triosephosphate isomerase from the parasite. Thus, further such investigations using a larger number of samples will be able to complement the epidemiology of Lamblia infection in Moscow residents.