This research was conducted to determine the prevalence and seasonal fluctuation of haemoparasites in dromedaries in the eastern part of Iran. Blood samples of 262 dromedaries (Camelus dromedarius) in abattoir of Mashhad, from May 2008 to June 2009, analyzed for haemoprotozoan by smear examination of blood stained with Gimsa\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s stain. The same samples were also examined by knott technique for detection of camel fillariasis. A total of 262 dromedaries14 (5.34%), 1 (0.58%) dromedaries were infected with Dipetalonema evansi and Trypanosoma evansi respectively. No infection with Theileria and Anaplasma were found. The prevalence rate of infection with Dipetalonema evansi was highest on autumn, ages 4-8 year and female dromedaries. However, there was no significant relation between infection, age, sex and season. In the second study, inspection of testes, epididymises, spermatic cords and lungs of 172 dromedaries defined that 10(5.81%) dromedaries were infected with adult forms of Dipetalonema evansi. Male nematode was measured 9.5-10.5cm, female nematode 17.5-19.5 cm and microfiller 260-360 micrometer. In conclusion, the results of this study show that dromedaries in eastern part of Iran usually suffer from low grade infections with Dipetalonema evansi.

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