Abstract
In 1923, Aynaud 1 reported the results of his studies on ecthyma contagiosum. In this report he described experimental procedures definitely identifying the disease as due to a filtrable virus and apparently peculiar to sheep and goats. Following this early work, the results of similar studies have been published by Glover, 2 Boughton and Hardy, 3 Oppermann and Stumpke, 4 Marsh and Tunnicliff 5 and others. As a result of these investigations, there is now available a rather complete and detailed knowledge of the disease as it exists in the animals studied. This information may be summarized somewhat as follows: ( a ) The disease is due to a specific filtrable virus. ( b ) It is apparently peculiar to sheep, goats and man. ( c ) It is known to exist throughout most of the wool-producing areas of the world. ( d ) Where preventive measures are not employed, it may be characterized by a high
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