Department of Veterinary Medicine
In the year 1905 the Bureau of Animal Industry of the United States Department of Agriculture began investigations to determine the relative efficiency of the various constitution of coal-tar dips in the treatment of Sheep Scab, in order to provide some standard whereby the efficiency of these dips could be determined by laboratory methods. The co-operation of the South Dakota Animal Agricultural Experiment Station was enlisted in the practical testing coal-tar dips of various known composition which were prepared by the Biochemic Division of the Bureau of Animal Industry. For this purpose sheep with well-developed cases of scab were procured and divided into small lots for each for each of which a separate dip was employed. Each lot was then placed in a separate pen and observations made from time to time as to its condition and progress. Undipped scabby sheep were kept under observation for a similar length of time for the purpose of comparison. It has been deemed inexpedient to burden this bulletin with statistics or detailed data accumulated during the two years covered by these experiments. While some dips other than the coal-tar dips were employed, the experiment had to do largely with the latter class. The information contained the sections dealing with coal-tar creosote and cresol dips has been largely obtained through the co-operative experiments conducted by this Station and the Bureau of Animal Industry. These experiments have demonstrated that coal-tar dips properly prepared and which when diluted for use contained certain percentages of coal-tar oil and cresylic acid or cresylic acid alone are effective remedies against sheep scab.
sheep scab, sheep disease, sheep scab regulations, coal-tar dipds
South Dakota Experiment Station, South Dakota State College of Agriculture and Mechanic Arts
Moore, E.L., "Sheep Scab" (1908). Agricultural Experiment Station Bulletins. 107.