FIG. 3.

Phylogenetic relationships of M. elephantis, clinical and type strains, with its closest genotypic and phenotypic relatives, based on the 16S rRNA gene. M. scrofulaceum is included due to its reported similarity with MCRO 17 (18). Multiple sequence alignments were determined from bp 54 to 1470 of the E. coli 16S rRNA gene by using the Clustal method algorithm in the Megalign component of the Lasergene program, version 4.01. The tree was rooted using Nocardia asteroides as the outgroup sequence. Sequences were determined in our laboratory unless indicated by a GenBank accession number.