This article presents the results of complex clinical, laboratory examination of a series of clinical cases of haemoparasites spread in the experimental and control group of amphibians of the pond frog species Pelophylax lessonae, caught on 7.05.2022. On the basis of the obtained results, the dependence of haemoparasites spread on conditions and period of keeping was revealed. The judgment that the longer the group of individuals is in artificial keeping conditions, the higher it has indicators on extensiveness, an average intensity of an invasion and an index of abundance of parasites.