Hindawi Publishing Corporation BioMed Research International Volume 2015, Article ID 728321, 5 pages http://dx.doi.org/10.1155/2015/728321 Research Article Cases of Echinococcus granulosus Sensu Stricto Isolated from Polish Patients: Imported or Indigenous? Monika Dybicz,1 Piotr Karol Borkowski,2 Julia Ddbrowska,1 and Lidia Chomicz3 1 Department of General Biology and Parasitology, Medical University of Warsaw, 5 Chałubinskiego´ Street, 02-004 Warsaw, Poland 2Department of Zoonoses and Tropical Diseases, Medical University of Warsaw, 37 Wolska Street, 01-201 Warsaw, Poland 3Department of Medical Biology, Medical University of Warsaw, 73 Nowogrodzka Street, 02-018 Warsaw, Poland Correspondence should be addressed to Monika Dybicz;
[email protected] Received 30 June 2015; Revised 21 August 2015; Accepted 16 September 2015 Academic Editor: Stefano D’Amelio Copyright © 2015 Monika Dybicz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The cases of nine Polish patients with diagnosed cystic echinococcosis (CE) were examined. A total of nine isolates obtained postoperatively were investigated using PCR and sequencing. The mitochondrial region of nad1 gene was amplified. This PCR and sequencing analysis revealed the presence of Echinococcus canadensis G7 in seven patients and E. granulosus G1 in two patients. These data demonstrate that E. canadensis is the predominant causative agent of human cystic echinococcosis in Poland. E. granulosus G1 detection in Polish patients suggests that the parasite was imported; however it does not exclude the possibility that these cases could have been of Polish origin.