Ratnam, SSubramanian, SSundararaj, TTANUVAS2016-09-012016-09-011983http://krishikosh.egranth.ac.in/handle/1/74873More number of positive titres were observed in dogs in PUO group 14/20 (70%) than with haemorrhagic enteritis group 6/14 (43%) with higher frequency of antibody to icterohaemorrhagiae (18/27) and canicola (17/27). Goats 8/22 (36%) appear to be more susceptible than sheep 8/38 (21%). The buffaloes were reacting more against tarassovi. Icterohaemorrhagiae appears to be prevalent both in domestic dogs as well as rats, while other strains do not prevail common among all the animals. It appears that different host harbour different strains of leptospires in Madras city.en-USLeptospiralDomestic AnimalsMadras CityArticle