Pieterson, P.M.Pefanis, S.M.Venter, Catharina G.Herr, S.Bigalke, R.D.2014-10-072014-10-0720141988Pieterson, PM, Gummow, B, Pefanis, S, Venter, CG & Herr, S 1988, 'The characteristics of a variant strain of Brucella melitensis Rev I', Onderstepoort Journal of Veterinary Research, vol. 55, no. 1, pp. 15-17.0330-24657003908833N-9314-2014http://hdl.handle.net/2263/42275The 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.Circumstantial evidence is presented for the occurrence of a variant of a vaccine strain of B. melitensis Rev 1, designated "FSA"(foreign South African). FSA resembles Rev 1 in its reactions to penicillin and streptomycin but reacts closer to a field strain of B. melitensis as regards dye (thionine and basic fuchsin) sensitivity and colony size. Although colonies of Rev 1 were consistently smaller than other B. melitensis strains, their size was 0,75 mm as opposed to the 1-2 mm reported in the literature, while B. melitensis 16M colonies were 1,25-1,5 mm as opposed to the 3-4 mm previously reported. Rev 1 was found to be urease positive, unless a test of low sensitivity was applied.en©ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle