Leptospirosis is one of the most important zoonotic disease spread all over the world with numerous reservoir hosts seen in wild and domestic animals. Etiologically, the disease can be transmitted to human through two ways of direct and indirect, and produces both icteric and non-icteric stages of infection.
In this study 427 serum samples collected from various area of Urmia for examination. The results of microscopic agglutination test (MAT) indicated that 62.5 percent were positive for leptospiral serotypes. Serum titers were equal or greater than 1:200 dilutions.
The most infection rate (18 percent) among cattles were in Dizejh-dol (A). Statistically, differences between area and positive and negatieve serotypes were not significant with (P<0.01). Four serotypes of leptospira including: L. interrogans (serovar. sejroe hardjo), L. interrogans (serovar. canicola hondotruche) and L. interrogans (serovar. Pomona) were detected in the region of urmia. Staistical analysis showed That the dominant serotype was L. interrogans (serovar. grippotyphosa) with the prevalence of 25.3 percent and the least infecting serotype was L. interrogans (serovar. pomona) (10.5 Percent). The percentage of infected cattle with more than one leptospira serotype was 5.15 percent.