title: Mutant prevention concentration: a new tool for choosing treatment in nontuberculous mycobacterial infections.
abstract: The mutant prevention concentration (MPC) of fluoroquinolones, linezolid, rifabutin, rifampicin and macrolides was determined in 16 nontuberculous Mycobacterium species in order to compare the incidence of resistant mutant occurrence for different antibiotics. Linezolid showed good activity against Mycobacterium gordonae and Mycobacterium kansasii. Rifabutin had a lower MPC values than rifampicin. The fluoroquinolones were more active against M. gordonae and Mycobacterium chelonae. Clarithromycin had better MPC values than azithromycin but its intracellular concentration was high. Mutant prevention concentration may help to establish a better clinico-microbiological correlation, the sub-populations of drug-resistant micro-organisms may be detected by that method. It is still important to administer correct drug doses, to use combined therapies and to find new drugs that are useful in the treatment of these infections.
authors.affiliation: Section of Microbiology, Hospital General Universitario de Elche, Camí de L'Almazara No. 11, Universidad Miguel Hernández, 03203 Elche (Alicante) Spain. micro_elx@gva.es
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Rodríguez
authors.forename: Laura
authors.initials: L
authors.lastname: Cebrián
authors.forename: Manuela
authors.initials: M
authors.lastname: López
authors.forename: Montserrat
authors.initials: M
authors.lastname: Ruiz
authors.forename: Gloria
authors.initials: G
authors.lastname: Royo
mesh_terms: D000900:Anti-Bacterial Agents / Q000145:classification / Q000493:pharmacokinetics / Q000627:therapeutic use*; D019540:Area Under Curve; D006801:Humans; D008826:Microbial Sensitivity Tests; D009154:Mutation; D009161:Mycobacterium / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D009164:Mycobacterium Infections / Q000517:prevention & control*
chemical_list: D000900:Anti-Bacterial Agents