2Ellis WA, etal. Role of cattle in the mainteenance of Leptospira interogans serotype hardjo infection in Noedma Ireland. Vet Rec,1981,108:555.
3Leonard FC, et al. Duration of urinary exeretion of Leptospires by cattle naturally or experimentally infected with Leptospira interrogans serovar hardjo. Vet Rec, 1992,131:435.
