Prevalence of Parasitic Helminthes on Fish in Diyala river, Iraq, and their Immuno Response

Abstract

This study was conducted on five sites in the Diyala River, namely Jalawla, Al-Saadia, Lake Hamrin, Baqubah, and Al-Khalis Creek, for the period from December 2022 to September 2023, with the aim of identifying fish species within these sites. 15 species of fish were recorded, Fish, Cyprinus carpio, Luciobarbus xanthopterus, Arabibarbusgrypus, Carasobarbusluteus, Mesopotamichthyssharpeyi, occupied the highest density.While Silurustriostegus, Chondrostomaregium, Planilizaabu, Carassiusauratus, and Garra variabilis had medium density, while Leuciscusvorax, Luciobarbus barbulus, Coptodon zillii, Cyprinion kais, and Mastacembelusmastacembelus recorded lower densities during the study period. After laboratory examination, it was found that these fish were infected with 27 species of monogenic flatworms, including 17 species of Gyrodactylus, 8 species of Dactylogyrus, and one species of Paradiplozoon and Cichlidogyrus. It was also found that the highest concentration of immunoglobulin Igm was in Cyprinus carpio, reaching 67.12 mg/ml, and its lowest concentration was in Chondrostomaregium, where it reached 21.15 mg/ml.