title: Multiple isolates from aids patients: aspects of an analysis by a genotypic marker and antimicrobial susceptibilities variations.
abstract: Twenty-one Mycobacterium avium multisolates, from ten human immunodeficiency virus-infected patients, were typed by restriction fragment length polymorphism using as marker the IS1245 and characterized by minimum inhibitory concentration for nine different antibiotics. Two out of four patients harboring multisolates with different fingerprint profile, were therefore considered as having a polyclonal infection, since their isolates were taken from sterile site. This result confirms that polyclonal infection caused by M. avium occurs with a nonnegligenciable frequency. Analyzing the multisolates susceptibility profile of each patient it was observed that most of them were infected with strains having appreciably different antimicrobial susceptibility patterns, no matter what the genotypic pattern of the strains was. These results have strong implication for the treatment of the patients.
authors.affiliation: Laboratório de Hanseníase, Departamento de Medicina Tropical, Instituto Oswaldo Cruz, Rio de Janeiro, RJ, 21045-900, Brasil. saad@ioc.fiocruz.br
authors.forename: M H
authors.initials: MH
authors.lastname: Saad
authors.forename: M A
authors.initials: MA
authors.lastname: Telles
authors.forename: F
authors.initials: F
authors.lastname: Porfirio
authors.forename: L
authors.initials: L
authors.lastname: Ferrazoli
authors.forename: L
authors.initials: L
authors.lastname: de Souza Fonseca
authors.forename: W
authors.initials: W
authors.lastname: Johnson
authors.forename: L W
authors.initials: LW
authors.lastname: Riley
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000382:microbiology*; D016172:DNA Fingerprinting; D005819:Genetic Markers; D005838:Genotype; D006801:Humans; D008826:Microbial Sensitivity Tests; D015269:Mycobacterium avium Complex / Q000187:drug effects / Q000235:genetics*; D015270:Mycobacterium avium-intracellulare Infection / Q000382:microbiology*; D010641:Phenotype; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D005819:Genetic Markers