Fig. 2.

Phylogenetic relationships of pool environment Mycobacterium spp. Shown are 16S rRNA gene sequences relative to cultured “slow-growing” (A) and “fast-growing” (B) mycobacteria. The analyses were based on an alignment of 890 nucleotide positions. Maximum likelihood, MP, and NJ algorithms resulted in identical results for the relationships supported by bootstrap analyses. NJ phylograms are shown to illustrate the phylogenetic results. Circles signify bootstrap support for nodes, with filled circles indicating MP and NJ boostrap support >70% and open circles indicating support >50%. Clones with prefixes MB and MC were obtained from the February 2001 and August 2001 sampling events, respectively. All mycobacterial clones were processed from pool air except for six clones that were processed from the pool water and sides sample (MC042310; MC0424c5; MC0424c7; MC0424c9; MC042411; and MC0508c9).