Supplementary Material. A: Phylogenetic tree based on 16S ribosomal gene sequences showing comparison of the 16S rDNA sequence of a Propionibacterium acnes gastric isolate (Accession number HF564646) to those of other related Propionibacteria species deposited in the GenBank database. Similarity analysis was performed with the Neighbour-Joining algorithm using MEGA 5.1 software.B: Phylogenetic tree based on 16S ribosomal gene sequences showing comparison of the 16S rDNA sequence of a Staphylococcus epidermidis gastric isolate (Accession number HF564648) to those of staphylococci of the Epidermidis-Aureus species group. Similarity analysis was performed as above.

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