Detection of 16S rRNA and P-1 adhesin genes in M. pneumoniae No. 4 and FH strains by PCR. (A) PCR using 16S RNA primers. Lane 1, No. 4 strain; lane 2, FH strain; lane 3, control (distilled water). (B) PCR using P-1 adhesin primers. Lane 1, No. 4 strain; lane 2, FH strain; lane 3, control (distilled water).