Detection sensitivity of 2426 PCR for genotyping M. ulcerans (strain 5152) with a dilution series of DNA. Lane 1, 106 genomes; lane 2, 105 genomes; lane 3, 104 genomes; lane 4, 103 genomes; lane 5, 102 genomes; lane 6, 10 genomes; lane 7, 1 genome; lane 8, no-template control; lane M, 100-bp ladder size marker.