Abstract
ENZOOTIC abortion of ewes (EAE) was originally described in Scotland by Stamp et al. in 19501, and since then the disease has been recognized in several other countries including the United States. The disease has recently been observed in California2. A somewhat analogous disease of cattle—epizootic bovine abortion (EBA)—has been recognized in this State for many years. Both diseases are caused by members of the psittacosis lymphogranuloma-venereum (PLGV) group of agents. The placenta is the primary site of predilection for the multiplication of the EAE agent, and the resulting placentitis is presumed to lead to abortion. In EBA, placentitis, although occasionally present, is not so obvious as the changes in the fœtus itself which include a generalized vasculitis with widely distributed petechiæ and focal, generalized hyperplasia of the reticuloendothelial system3. The birth of premature, weak young, many of which fail to survive, is a feature of both diseases.
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References
Stamp, J. T., McEwen, A. D., Watt, J. A. A., and Nisbet, D.I., Vet. Rec., 62, 251 (1950).
McKercher, D. G., McGowan, B., Wada, E. M., Harrold, D. R., and Studdert, M. J., J. Amer. Vet. Med. Assoc. (in preparation).
Kennedy, P. C., Olander, H. J., and Howarth, J. A., Cornell Vet., 50, 417 (1960).
Hartley, W. J., and Kater, J. C., Res. Vet. Sci., 4, 326 (1963).
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STUDDERT, M., KENNEDY, P. Enzootic Abortion of Ewes. Nature 203, 1088–1089 (1964). https://doi.org/10.1038/2031088a0
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DOI: https://doi.org/10.1038/2031088a0
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