Study of Parasitic Infection and Its HistologicalChanges in a Bird

In order to complete the previous study, the aim of this study was investigation the histopathological aspect of the tissue in pigeons naturally infected with Oocyste, worms ovum and Arthropada and was conducted from Feb to September 2013,On 125 (net trapped) wild pigeon living freely in the old obstructed tunnel (Rano) and rocks of Zakros mountain in the road between Ilam and Aivan city, in the South West of Ilam province, Iran. Gizzard, liver, spleen, pancreas, esophagus, intestine, proventriculus, trachea glands were separated and preserved. Fresh faecal samples were examined and egg per gram (EPG) was counted. Randomly, different tissue of 15 birds was collected and proceeded in Haematoxylin and Eosin for histopathological study. The birds was checked for ectoparasites. Degenerative changes in the epithelial tissues of the esophageal and proventriculus glands as well as destructive changes in the esophagus, duodenum and cecum of infected pigeons were shown. Massive congestion was seen in tissue of pancreas and trachea. The prevalence of Raillietina spp, Tetramers, Sygnamus, Capillaria, Ascaridia colombae, Oocyste of protozoa, Phthiraptera, Ceratophylluscolumbae contamination and multiples infection were 29%, 5%, 8%, 15%, 4%, 8%, 2%, 5% and 24% respectively. Collected ectoparasites included feather lice (Phthiraptera) and pigeon fleas (Ceratophyllu scolumbae) and the prevalence of different parasites in wild pigeon are somewhat different from racing and domestic pigeons in the same area and it might be had different immune responses. Parasite infection could have some histopathological effects on different tissue, though few such reports exist to the best of our knowledge.