(A) Ethidium bromide-stained agarose gel of PCR amplicons of a segment of the fba gene of mycoplasma of the mycoides cluster from DNA extracted from various tissues of the three deceased rhebok. Lanes 1 to 7, various tissues from rhebok case 1: lane 1, liver; lane 2, lung; lane 3, spleen; lane 4, small intestine; lane 5, retropharyngeal lymph node; lane 6, kidney; lane 7, heart. Lanes 8 to 15, various tissues from rhebok case 2: lane 8, liver; lane 9, lung; lane 10, spleen; lane 11, small intestine; lane 12, retropharyngeal lymph node; lane 13, nasal mucosa; lane 14, lung pleura; lane 15, oral mucosa. Lanes 16 to 27, various tissues from rhebok case 3: lane 16, liver; lane 17, lung; lane 18, spleen; lane 19, small intestine; lane 20, retropharyngeal lymph node; lane 21, nasal mucosa; lane 22, kidney; lane 23, oral mucosa; lane 24, conjunctiva; lane 25, heart; lane 26, tracheobronchial lymph node; lane 27, blood; lane 28, Dall’s sheep, retropharyngeal lymph node. (B) Alignment of fba DNA prototype sequences from the three deceased rhebok, Dall's sheep, and blue sheep and sequences from representative mycoplasma species of the mycoides cluster. Majority conserved nucleotides for a given position are enclosed in shaded boxes.