Theiler, Arnold, Sir, 1867-1936Transvaal Department of Agriculture2009-12-032009-12-031909Theiler, A 1909, 'The influence of cold on ticks and piroplasma parvum', Report of the Government Veterinary Bacteriologist for the year 1907-1908, pp. 10-13.http://hdl.handle.net/2263/12159The 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.Resume: 1. A temperature of 0 C. retards the hatching of Rhipicephalus appendiculatus nymphae into adults. 2. A temperature of 0 C. does not interfere with the development of the parasite within the engorged nymphae. 3. A temperature of 0 C. does not kill the virus contained in engorged nymphae of Rhipicephalus appendiculatus. 4. Larval ticks of Rhipicephalus decoloratus die within thirty minutes when exposed to a temperature of -18 C. 5. Larval ticks of Rhipicephalus decoloratus do not die when exposed to a temperature of -18 C. for fifteen minutes. 6. Larval ticks of Rhip1:cephalus decoloratus do not die when exposed to a temperature of -5 C. for twenty-four hours. 7. The majority of larval ticks of Rhipicephalus decoloratus die when exposed to a temperature 6f -5 C. for forty-eight hours.Reports consists of 4 pages.en© Transvaal Dept. of Agriculture (original). © University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary reportsSouth AfricaTemperatureRhipicephalus decoloratusRhipicephalus appendiculatusVeterinary medicine -- South AfricaVeterinary medicine -- History -- South AfricaBabesiosis -- South AfricaTicks as carriers of diseaseTechnical Report