Emerging Infectious Diseases (Jun 2015)

Additional Drug Resistance of Multidrug-Resistant Tuberculosis in Patients in 9 Countries

  • Ekaterina V. Kurbatova,
  • Tracy Dalton,
  • Julia Ershova,
  • Thelma E. Tupasi,
  • Janice Campos Caoili,
  • Martie L. van der Walt,
  • Charlotte L. Kvasnovsky,
  • Martin Yagui,
  • Jaime Bayona,
  • Carmen Contreras,
  • Vaira Leimane,
  • Laura E. Via,
  • HeeJin Kim,
  • Somsak Akksilp,
  • Boris Y. Kazennyy,
  • Grigory V. Volchenkov,
  • Ruwen Jou,
  • Kai Kliiman,
  • Olga V. Demikhova,
  • J. Peter Cegielski

DOI
https://doi.org/10.3201/eid2106.141329
Journal volume & issue
Vol. 21, no. 6
pp. 977 – 983

Abstract

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Data from a large multicenter observational study of patients with multidrug-resistant tuberculosis (MDR TB) were analyzed to simulate the possible use of 2 new approaches to treatment of MDR TB: a short (9-month) regimen and a bedaquiline-containing regimen. Of 1,254 patients, 952 (75.9%) had no resistance to fluoroquinolones and second-line injectable drugs and thus would qualify as candidates for the 9-month regimen; 302 (24.1%) patients with resistance to a fluoroquinolone or second-line injectable drug would qualify as candidates for a bedaquiline-containing regimen in accordance with published guidelines. Among candidates for the 9-month regimen, standardized drug-susceptibility tests demonstrated susceptibility to a median of 5 (interquartile range 5–6) drugs. Among candidates for bedaquiline, drug-susceptibility tests demonstrated susceptibility to a median of 3 (interquartile range 2–4) drugs; 26% retained susceptibility to <2 drugs. These data may assist national TB programs in planning to implement new drugs and drug regimens.

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