Distribution of TruGene HIV-1 resistance report codon mutations. Twenty clinical samples were analyzed by GuideLines 9.0 rules released by Bayer December 2004. x, results of original and diluted samples matched; ▴, results did not match, resistance interpretation affected; •, results did not match, resistance interpretation not affected. The following resistance codon mutations were not found: NRTI/NtRTI, RT gene codons 65, 77, 78, 88, 115, 116, and 161; NNRTI, RT gene codons 227 and 236; PI, PR gene codons 48 and 50.