Aligholi Ramin - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Gholamreza Abdollahpour - Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Aadeh Hosseinzadeh - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Farid Azzizzadeh - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Pouya Ramin - Student of Dentistry, Faculty of Dentistry, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Yousef Khalili - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Davood Sanajoo - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Sasan Iran Nejhad - Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

Leptospirosis, a zoonotic disease, is characterized by fever, jaundice, abortion and hemo-globinuria. It is widespread and the determination of the dominant serotype in the animal species of each region accelerates the control and prevention program. ۸۶۲ blood samples were prepared from ruminants and equines. Serum antibody of leptospira serovars were determined based on gender and age parameters. Sera were examined by microscopic agglutination test (MAT) with six live serotypes. The overall prevalence was ۲۲.۳۰%, with the highest (۳۷.۰۰%) and the lowest (۶.۶۰%) in Holsteins and mules, respectively. The overall male and female incidence were ۱۲.۲۰% and ۹.۸۶%, respectively, which was not different. The highest gender infection was in male Holsteins (۱۹.۲۰%) and the lowest were in male Simmentals and mules (۱.۷۲%). The highest dilution was ۱:۱۰۰ for pomona and the lowest was for canicola. All animals responded positively to grippotyphosa. The highest infection to one serovar was in Holsteins and the lowest for four serovars were in goats and Simmentals. Males less than ۱.۵ years old showed the highest infection. Age differences in leptospira infection except for sheep was significant. In conclusion, leptospira infection in ruminants was high compared to equines. Gender differences were not significant. The highest dilution was ۱:۱۰۰, with pomona in ruminants and grippotyphosa in all species. Leptospiral infection was increased with age and the differences among animals except for sheep were significant. Finally, regarding ۲۲.۳۰% infection rate, vaccination is necessary to Holsteins, and preventive measures for others. Health advices would be necessary for human safety.

age, Gender, Leptospirosis, Livestock, Pomona