Mohammad Yakhchali - Department of Pathobiology, Parasitology division, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Ali-Asghar Tehrani - Department of Pathobiology, Pathology division, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Mozafar Ghoreishi - General Veterinary practitioner in Bookan, Iran

This investigation was undertaken to verify the prevalence of helminths parasites in the gastrointestinal tract of catfish. A total number of ۱۱۶ catfish (Silurus glanis) were collected from Zarrine-roud river and examined for helminths. Fish were examined after washing contents of gastrointestinal tract and observed for the presence of helminths using a stereo microscope and a light microscope. Results indicated that ۱۸.۹۶% of the examined catfish were infected with digenean trematodes including Orientocreadium siluri (۲۷%), Crowcrocoecum skrjabini (۳۹%), and cestode Bothriocephalus gowkongensis (۳۴%). All the parasites were found in the intestine. Mid-gut followed by foregut appeared to be the most commonly infected parts of the alimentary tract of hosts. The results showed that there was a significant correlation between infection rate, catfish body size, and weight (P < ۰.۰۵).

Helminths, Silurus glanis, Zarrine-roud, Iran