Du Plessis, J.L.Van Gas, L.Labuschagne, F.J.Wijma, S.Verwoerd, Daniel Wynand2014-09-012014-09-0120131990Du Plessis, JL, Van Gas, L, Labuschagne, FJ & Wijma, S 1990, 'The freeze-drying of Cowdria ruminantium’, Onderstepoort Journal of Veterinary Research, vol. 57, no. 3, pp. 145-149.0330-2465http://hdl.handle.net/2263/41856The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Lyophilized tissues of mice and blood of sheep, infected with either the Kumm, the Welgevonden or the Ball 3 stock of Cowdria ruminantium, remain infective to mice and sheep after storage at 4ºC for 90 days. Freeze-dried tissues stored at -18 ºC and -28 ºC are still infective after 6 months and 2 years respectively.en©South Africa. Dept. of Agricultural Technical Services. ©University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle