Abstract
Introduction: Fascioliasis and dicrocoeliasis are the most frequent zoonotic diseases
with increasing human health problems in different parts of Iran. Two species, Fasciola hepatica
(F. hepatica) and Fasciola gigantica (F. gigantica), are spread in the country. Molecular approaches
have a decisive role in identifying both the species. The aim of this study was to detect
Fasciola spp. and Dicrocoelium spp. by amplifying the ITS-2 and 28S rDNA gene sequence.
Methods: Overall, 30 infected liver samples were collected from the livestock of Qazvin, Iran.
The adult flukes were collected from different livestock. DNA extraction and PCR amplification
of ribosomal RNA gene region (ITS2) and 28S rDNA gene fragment were conducted and a
phylogenetic tree was constructed.
Result: All the isolates obtained from the cattle (No: 7) and 82.6% (No: 19) of sheep isolates were
infected with F. hepatica species, whereas 17.4% (No: 4) of sheep isolates were infected with F.
gigantica. It was also shown that F. hepatica was the predominant species of Fasciola present in
the region. All the specimens were infected with Dicrocoelium dendriticum (D. dendriticum).
Conclusion: Both the species of Fasciola were found in Qazvin. D. dendriticum was the sole infecting
species of the Dicrocoelium genus in the livestock of the city of Qazvin. Further research
studies are needed to determine the intermediate host of the parasites in the region.
Keywords:
Fasciola hepatica, Fasciola gigantica, Dicrocoelium dendriticum, Iran, ribosomal RNA gene, specimens.
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