Summary of isolates.

1Group based on nearest neighbour in cpn60 reference database, L. Lactobacillus, P. Pediococcus, W. Weissella, E. Enterococcus, S. Streptocococus, Pe. Peptoniphila, B. Bacillus, Ge. Gemella, St. Staphylococcus, Pr. Prevotella, Ba. Bacteroides, E. Escherichia, K. Klebsiella, Bi. Bifidobacterium, G. Gardnerella.2Interspacer size in base pairs for major and first minor peak. Value shown is the mode interspacer size with range of observed values shown in brackets.3Phenotypic information summarized as mode values of each cpn60 group in terms of intensity of acid and H2O2 production on 4-point scales (see Methods), and total number of double-strong isolates in each cpn60 group.