Prevention of leptospirosis in young calves by vaccinating their dams in late pregnancy

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Abstract
Extract Within the last ten years, leptospirosis has been recognized in many countries as a serious source of economic loss in livestock and as an important problem in public health. The presence of Leptospir canicola, L. icterohaemorrhagiae, L. hyos, and L. pomona in New Zealand has been established or confirmed by the Diagnostic Labaratory of the Wallaceville Animal Research Station (Annual Report, 1950–51) and Kirschner and his associates ( 1951 Kirschner, L. and Gray, W. G. 1951. N.Z Med. J., 50: 342–342. [Google Scholar] , 1952 Kirschner, L. , Miller, T. F. and Garbek, C. H. 1952. N.Z Med. J., 51: 98–98. [Google Scholar] , 1954 Kirschner, L. 1954. N.Z Med. J., 53: 119–119. [Google Scholar] ). As in the United States, L. pomona appears to be the predominant species (Salisbury and McDonald, 1955 Salisbury, R. M. and McDonald, N. R. 1955. Rapp. Off. int. Epiz., 132.R.No.405 [Google Scholar] ).

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