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The purpose of this article was to present current data on cases of cystic echinococcosis in humans and animals in Poland. Cystic echinococcosis, caused by Echinococcus granulosus, is one of the most important parasitic zoonoses occurring globally. In many regions of the world, the disease is an important epidemiological problem. The life cycle of Echinococcus involves hoofed farm animals and dogs. Among its species and genotypes ascertained in the world, two (G1 and G7) have been confirmed in sheep and pigs as intermediate hosts in Poland. Molecular examinations of postoperative parasitic material from patients established that the porcine strain G7 is the cause of human cystic echinococcosis in Poland. Data on post-slaughter examinations of pigs identified as intermediate hosts of E. granulosus suggest that the number of cases reported in humans (approx. 40 annually) is probably underestimated. In the last two years, the prevalence of hydatid cysts in pigs in Poland has been estimated at 0.3%, with the highest number of infected animals in central Poland (0.4%-1.2%). This indicates the presence of infection in dogs and the risk of echinococcosis for humans.
Echinococcus granulosus is a tapeworm, the larval forms of which are causative agents of cystic echinococcosis: a dangerous, widespread zoonotic disease. It is a cosmopolitan species, found in many countries on all continents, thus threatening the productivity of livestock and the health of the people around the world. With the development of molecular methods, several distinct species were separated from E. granulosus s.l., differing in host range, geographical distribution, morphology of mature and larval forms, time of maturation and location of the larvae in individual organs. The purpose of the present review is to summarize current knowledge about the epidemiology and geographical distribution within the species E. granulosus s.l. in definitive hosts (dogs) as well as intermediate hosts (livestock). The paper also indicates the most epidemiological relevant genotypes of E. granulosus in a particular area. Moreover, methods of diagnosis of the parasite and the risk factors favorable to its spread and infection are described in this article.
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