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Sixty Giardia duodenalis isolates from domestic (n = 49) and wild (n = 11) animals (dogs, cats, deers, wolves, raccoon dog and muskrat) were analysed by PCR-RFLP at glutamate dehydrogenase locus (gdh). The isolates were obtained from positive feces samples for Giardia cysts analysed by flotation technique with saturated sodium chloride solution (specific gravity 1.28).

Three G. duodenalis genotypes were identified: C (10/60; 16.7%); D (42/60; 70.0%); and E (7/60; 11.7%). In dogs all three genotypes were found, with the following prevalences: 76.9% genotype D (30/39); 23.1% C (9/39); 2.6% genotype E (1/39). One dog was co-infected with C and D genotypes. In cats we identified only G. duodenalis genotype D. Wolves and raccoon dog harbored infection with G. duodenalis genotype D, deers with E type and muskrat C type.

This is the first study regarding genotyping of G. duodenalis in cats and wild animals …