RAPD patterns generated from B. thetaiotaomicron and other Bacteroides species. RAPD patterns were obtained by AP-PCR amplification of genomic DNA with the primer OPA-09. Lanes M contain 100-bp DNA ladder (Gibco BRL). Lanes 1 and 8, B. thetaiotaomicron (Bth) ATCC 29741; lane 2, B. ovatus (Bo) ATCC 8483; lane 3, B. fragilis (Bf) ATCC 25285; lane 4, B. distasonis (Bd) ATCC 8503; lane 5, B. uniformis (Bu) ATCC 8492; lane 6, B. vulgatus (Bv) ATCC 8482; lane 7, B. caccae (Bc) ATCC 43185; lanes 9 to 15, B. thetaiotaomicron (bth) clinical isolates; lane 16, B. ovatus (bo) clinical isolate; lanes 17 to 22, B. fragilis (bf) clinical isolates. In lane 1, the 1.2-kb amplicon shared by B. thetaiotaomicron strains is indicated by the white box around the band.