title: Drugs for preventing tuberculosis in people at risk of multiple-drug-resistant pulmonary tuberculosis.
abstract: BACKGROUND
  The emergence and spread of multiple-drug-resistant tuberculosis (MDR-TB), caused by strains of Mycobacterium tuberculosis resistant to at least isoniazid and rifampicin, is a potential threat to global tuberculosis control. Treatment is prolonged, expensive, more toxic than treatment of susceptible tuberculosis, and often unsuccessful. Experts are still undecided on the management of people exposed to MDR-TB.
  
  
  OBJECTIVE
  To evaluate antituberculous drugs given to people exposed to MDR-TB in preventing active tuberculosis.
  
  
  METHODS
  We searched the Cochrane Infectious Diseases Group Specialized Register (January 2006), CENTRAL (The Cochrane Library 2006, Issue 1), MEDLINE (1966 to January 2006); EMBASE (1974 to January 2006), LILACS (1982 to January 2006), conference proceedings, and reference lists. We also contacted researchers and organizations.
  
  
  METHODS
  Randomized controlled trials comparing antituberculous drug regimens with an alternative antituberculous drug regimen, placebo, or no intervention given to people exposed to MDR-TB for preventing active tuberculosis.
  
  
  METHODS
  Two authors independently inspected titles and abstracts identified by the search in order to identify potentially relevant publications for inclusion and analysis.
  
  
  RESULTS
  No randomized controlled trials met the inclusion criteria.
  
  
  CONCLUSIONS
  The balance of benefits and harms associated with treatment for latent tuberculosis infection in people exposed to MDR-TB is far from clear. Antituberculous drugs should only be offered within the context of a well-designed randomized controlled trial, or when people are given the details of the current evidence on benefits and harms, along with the uncertainties.
authors.forename: A
authors.initials: A
authors.lastname: Fraser
authors.forename: M
authors.initials: M
authors.lastname: Paul
authors.forename: A
authors.initials: A
authors.lastname: Attamna
authors.forename: L
authors.initials: L
authors.lastname: Leibovici
mesh_terms: D000995:Antitubercular Agents / Q000627:therapeutic use*; D006801:Humans; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D018088:Tuberculosis, Multidrug-Resistant / Q000517:prevention & control*; D014397:Tuberculosis, Pulmonary / Q000188:drug therapy*
chemical_list: D000995:Antitubercular Agents