DNA was extracted using the modified method described by Subbotin et al. (2001) and Fullaondo et al. (1999). Five cysts from each region were collected randomly into an Eppendorf tube filled with 150 μl lyses buffer (125 mM KC; 25 mM Tris–HCl, pH 8.0; 3.75 mM MgCl2; 2.5 mM DTT; 1.125 % Tween 20 and 0.025 % gelatin) and 5 μl Proteinase K (600 μg/ml) (USB, UK) and were crushed using a plastic pistil. Following consecutive incubation periods at 65 °C for 1 h and 95 °C for 10 min, and centrifugation at 11,000 g for 10 min. DNA then was purified into chloroform-isoamyl alcohol (24:1) and precipitated with 3 M sodium acetate and absolute ethanol. DNA extract was resuspended into 20 μl sterile water and kept at −20 °C. Three primers used were as follows; specific primer for