Alveolar echinococcosis caused by Echinococcus multilocularis is common parasitic disease among humans and animals in the northern hemisphere. Dogs, foxes, and other wild canids are definitive hosts, whereas small rodents play the role of intermediate hosts. In rare cases, after incidental ingestion of tapeworm eggs, dogs can become an intermediate host. The study describes briefly two cases of alveolar echinococcosis in dogs in Poland, including clinical management, diagnostic, treatment and molecular confirmation. Diagnostic procedures included laparotomy, cytology, histopathology and molecular analysis. Obtained sequences data were 100% homologous to E. multilocularis dehydrogenase subunit 1 gene sequences in GenBank®. To the authors’ knowledge, alveolar echinococcosis has not been reported previously in a dog in Poland.
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