title: The global status of resistance to antiretroviral drugs.
abstract: Since 1989, the emergence of resistant human immunodeficiency virus mutants has been documented for any new antiretroviral agent introduced in the clinical setting; it is a major cause of failure of antiretroviral therapy that may ultimately compromise the antiretroviral's efficacy in the general population. In most cases, resistance is due to poor adherence by the patient and/or to low potency of the therapeutic regimen. Resistance is called "primary" if detected in treatment-naive persons and is called "acquired" when it develops in treatment-experienced persons. This latter population represents potential transmitters of resistant viruses to newly infected persons. Data about the actual prevalence of resistance are derived from studies that differ in design, sample size, geographic area, and definitions. For this reason, a limited number of surveillance programs have been established in the past, both in countries where highly active antiretroviral therapy is widely accessible and in geographic areas where it is being introduced.
authors: Department of Drug Research and Evaluation, Istituto Superiore di Sanita, Rome, Italy.
authors: Stefano
authors: S
authors: Vella
authors: Lucia
authors: L
authors: Palmisano
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy* / Q000453:epidemiology / Q000635:transmission / Q000821:virology; D044966:Anti-Retroviral Agents / Q000494:pharmacology* / Q000592:standards / Q000627:therapeutic use*; D023241:Antiretroviral Therapy, Highly Active / Q000706:statistics & numerical data; D024882:Drug Resistance, Viral / Q000235:genetics; D014943:Global Health; D006678:HIV / Q000145:classification / Q000187:drug effects* / Q000235:genetics; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000706:statistics & numerical data; D009154:Mutation / Q000235:genetics; D015995:Prevalence
chemical_list: D044966:Anti-Retroviral Agents