tokens: Microsphere immunoassay results showed that 16.7 % ( 10/60 ) of horse blood samples collected in Golestan province were seropositive against WNV ( 7 ; 11.7 % ) , Flavivirus ( 2 ; 3.3 % ) and seropositive for USUV or WNV ( 1 ; 1.7 % ) .