Theiler, Arnold, Sir, 1867-1936Transvaal Department of Agriculture2009-12-022009-12-021908Theiler, A 1908, 'Inoculation of mules with polyvalent virus and serum', Report of the Government Veterinary Bacteriologist for the year 1906-1907, pp. 192-213.http://hdl.handle.net/2263/12097The journals have been scanned with a SupraScan 10000RGB scanner; 24-bit true colour, 400 dpi, saved in TIFF-format. Copies of the master images have been converted to Black & White, 1-bitmap images and OCRed with ABBYY Fine Reader v.9 software. Adobe Acrobat v.9 was used for the merging and conversion to the final presentation PDF-format.Conclusion:-The immunisation against a polyvalent virus with an adequate serum produces immunity which protects against any of its constituents. The immunity is strong enough to prevent a reaction in the majority of cases, and strong enough to pass the reacting animals through a mild disease. Compared with the results obtained by the injection of a mixture of sera and their adequate vira, the immunity of the polyvalent virus and serum protects better against the constituents of the said polyvalent virus. I must state here that the reactions noted after the injection may not always be due to the injection, but may be of a coincidental nature, or the reaction may not necessarily be a horse-sickness reaction. At the same time, we have no other means of controlling horse-sickness reactions except by the thermometer, inasmuch as slight reactions are not accompanied with characteristic symptoms. For practical purposes, however, I consider that the immunity obtained by a polyvalent virus will, in practice, protect better than that obtained by an individual strain of virus.Report consists of 22 pages. Resume of tests is tabulated across 3 pages.enFaculty of Veterinary Science, University of Pretoria (electronic version) with acknowledgement to the Transvaal Department of Agriculture.Veterinary bacteriologyVeterinary reportsVeterinary medicineSouth AfricaInoculation experimentsVeterinary medicine -- History -- South AfricaVeterinary medicine -- South AfricaHorses -- Virus diseasesTechnical Report