M.A. Thesis:

Prevalence of zoonotic parasites(hydatid cyst) in slaughtered livestock in slaughterhouses khalilabad

Parasitic diseases are very significant in ruminants. Fasciolosis and Dicrocoeliasis and Hydatidosis are three examples of parasitic diseases that often occur in chronic conditions and show no obvious clinical symptoms. Therefore, these diseases not only cause deaths in flocks, but also cause many economic losses. Fasciolosis is caused by the type Trichoderma Fasciola. Fasciola hepatica is one of the most important species of fasciolosis in small ruminants. The severity of the disease depends on factors such as age and host species, the stage of parasite development in the host (the animal and / or human being as the final host), the nutritional status and the number of treatments eaten by the host. Dicrocoelium dendriticum is one of the most commonly used trematodes in different parts of Iran. In chronic infections, this parasite causes cystic bile ducts in the liver of cattle, sheep or goats and causes a lot of economic losses. Also, the hydatid cyst is the epithelium of the Echinococcus granulosus. This worm is 7-3mm, a small bowel parasite of the dog. Cream eggs are excreted in the infected dog's stool and dispersed in the environment. Humans and animals are eaten with these eggs, along with water, food and vegetables, and they form hydatid cysts in their bodies. For this purpose, 2544 head sheep. 488 head of goat 245 head of cattle were taken randomly in 6months (fall and winter 97, spring 98) in the slaughterhouse after the fecal specimen was slaughtered from the rectum. The liver and their lungs were also inspected for slaughter. Fecal samples were fixed in 10% formalin. The samples were then referred to the veterinary parasitology laboratory of the city for microscopic examination and were subjected to fecal zinc sulfate saturation solution. Subsequently, an optical microscope was examined for the presence of eggs of Fasciola hepatica and Dicrococlium, dendriticum. The results of this study showed that from 2544 sheep tested in 180 cases (7/07%), liver contamination with Dicrocoelium dendriticum in 5 cases (0.19%), liver contamination to Fasciola hepatica, liver contamination to bydatid cysta in 57 Cases (2/24%) and lung contamination with hydatid cysts 640 Cases (25/15%). Of the 488 head of goat, 18(3/62%) case of the liver were detected in Dicrocoelium dendriticum, in 3 cases (0/61%), liyer contamination to Fasciola hepatica, liver contamination to hydatid cyst in 6 cases (12/29 %) and lung infection to hydatid cyst showed 140 cases (28/68 %). Of the 245 cows examined, 12 Cases (4/89 %) were infected with Dicrocoelium dendriticum, but no cases of infection of cows with Fasciola hepatica were observed. Liver contamination to hydatid cyst was observed in 8 cases (3/39%) and lung infection to hydatid cyst in 60 cases (24/48 %).

Keywords: : Fasciola hepatica, Dicrocoelium dendriticum, Hydatid cyst, Sheep. Goat, cow, KhalilAbad