Watkins-Pitchford, H.Union of South Africa. Dept. of Agriculture2010-02-222010-02-221912Watkins-Pitchford, H 1912, 'Dipping and tick destruction : part 4', Government Printing and Stationery Office, Pretoria, pp.31.http://hdl.handle.net/2263/13195The 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.This report deals more with the details of the actual attachment of the tick and the attendant infection of its host.The topics reported on are: Schedule I – Two charts illustrating the production of the disease East Coast fever by means of a single tick; Schedule II – Four charts showing that after attachment for a certain period to its host the tick loses its power of infection; Schedule III – Four charts illustrating the finding that the brown tick cannot infect its host until many hours after its effective attachment; Schedule IV – Three charts showing that the brown tick can not only reattach itself but can actually infect successive hosts; Schedule V – Two charts showing the ability of the horse to act as the host of, and convey the disease, by means of a single infectious tick; Schedule VI – A schema showing the exact period or phase of the tick’s attachment during which it is infectious; Schedule VII – A photograph of a group of regularly dipped equines to show that the animals are not affected in condition; Schedule VIII – Six microphotographs on the head of the tick; Schedule IX – Correspondence relating to effect of “Laboratory” dip upon wool;31 pages : 15 charts, 6 microphotographs, 1 black and white photographen©Dept. of Agriculture, South africa (original). ©University of Pretoria. Dept. of Library Services (digital).South AfricaVeterinary reportsSheep scabRhipicephalus appendiculatusBrown tickEast Coast feverVeterinary medicine -- South AfricaVeterinary medicine -- History -- South AfricaTicks as carriers of diseaseTicks -- ControlTick-borne diseases in animalsTechnical Report