| seroepidemiology of leptospira interrogans serovar hardjo in colorado antelope and cattle. | a seroepidemiologic study was conducted to determine the prevalence of leptospira interrogans serovar hardjo infection in colorado cattle and antelope. sera were tested by the microscopic agglutination test, using a standard battery of 12 antigens as well as 4 additional serovars of the hebdomadis serogroup: hardjo, szwajizak, sejroe, and balcanica. sera from 1,856 cattle and 544 antelope were tested. in both populations, the predominant serovar detected was hardjo; hardjo titers greater than or ... | 1981 | 7327994 |