PCR-based amplification of the mitochondrial Nad1 and Cyt-b genes revealed that 25 out of the 28 cyst samples (17 from the liver, four from the lungs, two from the spleen, and two from the mesentery) were positive for E. granulosus s.s., and that 3 out of the 28 lungs samples were amplified for E. multilocularis (Figures 2, 3). This evidence concerns the gene MT-ND1 and cyst.