Emerging sources and pathways for leptospirosis: a paradigm shift.
Leptospirosis is an infectious disease caused by bacteria called Leptospira. There are over 300 different kinds of Leptospira worldwide but only 5 of these has been found to be circulating in New Zealand. These are called serovars. The 5 serovars circulating in New Zealand are called Hardjo, Pomona, Copenhageni, Ballum and Tarassovi. The bacteria can infect any mammal and can live in their kidneys. It is secreted in the urine of infected mammals and can survive in the environment (soil and water) for a long time.... more details
Dreyfus, A., Wilson, P., Benschop, J., Collins-Emerson, J., Verdugo, C., Heuer, C.  Seroprevalence and Herd-Level Risk Factors for Seroprevalence of Leptospira Spp. In Sheep, Beef Cattle and Deer in New Zealand. N Z Vet J (Aug 19 2018): 1-27. doi
Shrestha, R., McKenzie, J.S., Gautam, M., Adhikary, R., Pandey, K., Koirala, P., Bc, G.B., Miller, L.C., Collins-Emerson, J., Craig, S.B., Shrestha, S., Heuer, C. . Determinants of clinical leptospirosis in Nepal.. Zoonoses Public Health. doi