evaluation of histopathological features of argas reflexus bite in pigeon

argas reflexus is considered obligate blood feeder that may cause skin redness and local swelling. for histopathological evaluation of biting site, pigeons were used as natural host species in this study. adult ticks were collected from urmia, north-west of iran and kept in a desiccator before their use in the experiment. sixteen pigeons were infested experimentally and were divided into 4 groups, euthanized after 30 min, 4, 24 and 48h for evaluation of histopathological changes in biting sites. early histopathologic lesions due to time of infestation included edema, hemorrhagic foci, vascular congestion, necrosis and mild to severe inflammatory reaction in dermis. in late lesions, presence of micro abscess foci in dermis was prominent. this study well documented the different pathological changes of skin of pigeons with argas reflexus. however, further study should be performed to evaluate allergic immune responses and pathological changes in other animal species including human.