a1 School of Veterinary Studies, Murdoch University, Murdoch, Western Australia, 6153
a2 Department of Zoology and Applied Entomology, Imperial College, London, SW7 2BB
Attention has been drawn to the fact that the occurrence of the cystic stage of Echinococcus granulosus in 60% of slaughtered horses represents a potential public health hazard (Thompson and Smyth, 1974). Williams and Sweatman (1963) regard this organism as a separate sub-species, E. granulosus equinus distinct from E. granulosus granulosus, but we prefer at this stage to refer to it as the horse “strain” which exhibits some small morphological differences from organisms of sheep origin.
(Accepted May 05 1976)