ABSTRACT
Neospora caninum, a pathogenic protozoan parasite, has been considered as a major cause of infectious bovine abortion throughout the world . The aim of the present study was to determine the seroprevalence of N. caninum antibodies in native and crossbreed cattle of Hamedan province, Iran . Serum samples of native [n=139] and crossbreed cows [n=261] were examined using ELISA method values were analyzed by description analysis. The frequency of prevalence for N.caninum antibodies was shown as much as 20% . Furthermore, the most and the least frequency rates were shown in cattle over 4 years old [32.33%] and less than 2 years old [7.32%], respectively [p<0.05] . Meanwhile, 64% of cows which had abortic chain were seropositive [p<0.05]. It can be concluded that N.caninum should be considered as a causative agent for abortion in native and crossbreed cattle in Hamedan province