Tehran University of Medical Sciences Journal of Arthropod-Borne Diseases 2322-1984 6 1 2012 06 15 70 78 EN B Mosallanejad Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran AR Alborzi Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran N Katvandi Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran 2015 10 03 Background: The objective was to determine the prevalence of ectoparasite infestations in referred companion dogs to veterinary hospital of Shahid Chamran University of Ahvaz, from 2009 to 2010. Methods:A total of 126 dogs were sampled for ectoparasites and examined by parasitological methods. The studied animals were grouped based on the age (<1 year, 1–3 years and >3 years), sex, breed and region. Results: Thirty six out of 126 referred dogs (28.57%) were positive for external ectoparasites. The most common ectoparasites were Heterodoxus spinigera, which were recorded on 11 dogs (8.73%). Rhipicephalus sanguineus, Sarcoptes scabiei, Otodectes cynotis, Xenopsylla cheopis, Cetenocephalides canis, Cetenocephalides felis, Hip­pobosca sp. and myiasis (L3 of Lucilia sp.) were identified on 9 (7.14%), 7 (5.56%), 6 (4.76%), 3 (2.38%), 3 (2.38%), 2 (1.59%), 2 (1.59%) and one (0.79%) of the studied dogs respectively. Mixed infestation with two species of ectoparasites was recorded on 8 (6.35%). Prevalence was higher in male dogs (35.82%; 24 out of 67) than females (20.34%; 12 out of 59), age above 3 years (31.81%; 7 out of 22) and in the season of winter (30.95%; 13 out of 42), but the difference was not significant regarding to host gender, age and season (P>0.05). Conclusion:Apparently this is the first study conducted in companion dogs of Ahvaz District, South-west of Iran. Our results indicated that lice and ticks were the most common ectoparasites in dogs of this area. The zoonotic nature of some ectoparasites can be regard as a public health alert. https://jad.tums.ac.ir/index.php/jad/article/view/101 https://jad.tums.ac.ir/index.php/jad/article/download/101/99