Sero-epidemiology of Leptospirosis in Livestock Slaughterhouses

Leptospirosis is an emerging infectious disease and is considered to be the most widespread zoonotic disease in the world. The microscopic agglutination test (MAT) is the gold standard test for serological diagnosis of the Leptospirosis. The aim of this study was Epidmiological survey of Leptospira in livestock slaughterhouses of zanjan province,in iran. A total of 135 serum samples randomly collected from herds since february 2012 to june 2012. Sera were tested by MAT using live Leptospira interrogans serovars: Hardjo, Pomona, Icterohaemorrhagiae, Grippotyphosa, Canicola,Autumnalis and Serjoe. The results showed that the 44.4% livestock sera showed positive serological reaction against leptospiral antigens. The most common serovars were L, Serjoe Hardjo. L. Canicola and L. Auotomnlis with (29.27%), (17.89%)and (16.26%) respectively. In positive sera the antibody titers of 1:200 (54.47%), 1:400 (27.64%), 1:800(10.57%), and 1:600(3.25%),1:3200(4.07%), were detected.In contrast to other studies in Iran, the percentage of prevalence of leptospiral infection in zanjan was almost higher after Ahwaz. The high prevalence of infection and dominant titer of 2:100 reveal that leptospiral infection in Zanjan is endemic.