Abattoir survey was carried out to determine the prevalence of gastrointestinal helminths and the seasonal fluctuations in intestinal worm burdens and faecal worm egg counts of camel in Khorasan Razavi province in the northeast of Iran. A total of 306 dromedaries (Camelus dromedarius) in Mashhad abattoir, in northeast of Iran and the capital of Khorasan province were examined between October 2007 and September 2008 .By coproscopy examinations 75.1% dromedaries were found to be harboring different types of nematod eggs. Faecal flotation revealed the presence of Nematodirus, strongyloides, Trishuris, Marshallagia, stongyle type nematode eggs. In addition, gastrointestinal tracts of 50 camels slaughtered in Mashhad abattoir were used for identification and count of helminths. Postmortem examinations revealed that prevalence of helminths were Trichostrongylus probolurus (64%) , Trichuris globulosa (40%) ,camelostrongylus mentulatus (38%) , T. colubriformis (34%) , stilesia globipunctata (30%) , Nematodirella dromedarii (22%) , Haemonchus longistipes (18%) , Nematodirus oiratianus (16%), Cooperia oncophora (16%) ,Trichuris barbetonensis (10%), Parabronema skrjabini (10%) , Nematodirella cameli (10%) , Marshallagia marshalli (4%),Teladorsagia circumcincta (4%), Moniezia benedeni (3%) , Moniezia expansa (3%) and Trichostrongylus vitrinus(2%) . Nematodirella dromedarii, Trichostrongylus probolurus, Trichostrongylus colubriformis, Cooperia oncophora, Nematodirus oiratianus, was identified from dromedary in Iran for the first time. The pathological lesions in affected abomasums, small and large intestines were hyperaemic and thickened mucosa with haemorrhagic foci. Histopathological examination revealed inflammatory reaction in the abomasa, flattened mucosa and villous atrophy with inflammatory reactions composed of eosinophils and lymphocytes in the intestines, respectively. The prevalence observed in the present study indicates the necessity of using anthelmintic drug for increasing health and productivity of camels.

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