Multidrug-resistant to extensively drug resistant tuberculosis: what is next?

J Biosci. 2008 Nov;33(4):605-16. doi: 10.1007/s12038-008-0078-8.

Abstract

Drug resistant tuberculosis is a man made problem. While tuberculosis is hundred percent curable, multidrug resistant tuberculosis (MDR-TB) is difficult to treat. Inadequate and incomplete treatment and poor treatment adherence has led to a newer form of drug resistance known as extensively drug resistant tuberculosis (XDR-TB). XDR-TB is defined as tuberculosis caused by Mycobacterium tuberculosis strain, which is resistant to at least rifampicin and isoniazid among the first line anti tubercular drugs (MDR-TB) in addition to resistance to any fluroquinolones and at least one of three injectable second line anti tubercular drugs i.e. amikacin, kanamycin and/or capreomycin. Mismanagement of tuberculosis paves the way to drug resistant tuberculosis. Emergence of XDR-TB is reported world wide. Reported prevalence rates of XDR-TB of total MDR cases are; 6.6% overall worldwide, 6.5% in industrialized countries, 13.6% in Russia and Eastern Europe, 1.5% in Asia, 0.6% in Africa and Middle East and 15.4% in Republic of Korea. Better management and control of tuberculosis specially drug resistant TB by experienced and qualified doctors, access to standard microbiology laboratory,co-morbitidy of HIV and tuberculosis,new anti-TB drug regimens, better diagnostic tests,international standards for second line drugs (SLD)-susceptibility testing,invention of newer anti- tubercular molecules and vaccines and knowing the real magnitude of XDR-TB are some of the important issues to be addressed for effective prevention and management of XDR-TB.

Publication types

  • Review

MeSH terms

  • Acquired Immunodeficiency Syndrome / complications
  • Antibiotics, Antitubercular / pharmacology*
  • Antibiotics, Antitubercular / therapeutic use
  • Drug Resistance, Multiple, Bacterial*
  • HIV Infections / complications
  • Humans
  • Microbial Sensitivity Tests
  • Mycobacterium tuberculosis / drug effects*
  • Mycobacterium tuberculosis / genetics
  • Treatment Outcome
  • Tuberculosis / complications
  • Tuberculosis / drug therapy
  • Tuberculosis / microbiology*
  • Tuberculosis / prevention & control

Substances

  • Antibiotics, Antitubercular