Bovine abortion caused by infection withLeptospira pomona

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Abstract
Extract Although abortion associated with leptospirosis has been reported, this has not hitherto been regarded as one of the more important results of the disease. Abortion can occur with or without symptoms of infection by leptospira. Thus Mathews ( 1946 Mathews, F. P. 1946. Amer.J.vet.Res., 7: 78–78. [Google Scholar] ), Little, Beck, and McMahon ( 1950 Little, R. B. , Beck, J. D. and McMahon, J. V. 1950. Vet.Med., 45: 104–104. [Google Scholar] ), and Sippel, Boyer, and Chambers ( 1952 Sipell, W. L. , Boyer, C. I. and Chambers, E. E. 1952. J.Amer.vet.med.Ass., 120: 278–278. [Google Scholar] ) report abortions in animals showing other clinical manifestations of leptospirosis, while Gouchenour and Yager ( 1953 Gouchenour, W. S. and Yager, R. H. 1953. Vet.Med., 43: 218–218. [Google Scholar] ) and Bailey ( 1953 Bailey, J. W. 1953. J.Amer.vet.med.Ass., 122: 222–222. [Google Scholar] ) report leptospiral abortions with no other clinical symptoms. Gouchenour and Yager ( 1953 Mathews, F. P. 1946. Amer.J.vet.Res., 7: 78–78. [Google Scholar] ) state, “Except for abortion itself, or dropping of non-viable calves, dams exhibited little or no evidence of disease.” Recently, outbreaks of abortion associated with leptospirosis have occurred in several parts of New Zealand. One of these outbreaks was investigated closely, and results are reported in this paper.

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