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AN OUTBREAK OF BOVINE ABORTIONS ASSOCIATED WITH LEPTOSPIROSIS
Author(s) -
Knott S. G.,
Dadswell L. P.
Publication year - 1970
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1970.tb15579.x
Subject(s) - leptospirosis , abortion , outbreak , ice calving , leptospira , herd , population , veterinary medicine , serology , epidemiology , cattle diseases , biology , pregnancy , gestation , medicine , zoology , virology , immunology , lactation , environmental health , antibody , genetics
Summary A severe abortion storm on a grazing property, in which 50% of Hereford cows aborted in 2 months, is described. Serological evidence suggested that the abortion storm was due to leptospirosis. Epidemiological factors associated with the abortion storm were (a) introduction of infected cows into a susceptible population; (b) the practice of seasonal calving, which resulted in the susceptible population being in the last third of gestation when exposed to infection; and (c) environmental conditions suitable for the propagation of leptospira being coincident with the introduction of infection into the susceptible herd.