High rate of drug resistance among tuberculous meningitis cases in Shaanxi province, China

Sci Rep. 2016 May 4:6:25251. doi: 10.1038/srep25251.

Abstract

The clinical and mycobacterial features of tuberculous meningitis (TBM) cases in China are not well described; especially in western provinces with poor tuberculosis control. We prospectively enrolled patients in whom TBM was considered in Shaanxi Province, northwestern China, over a 2-year period (September 2010 to December 2012). Cerebrospinal fluid specimens were cultured for Mycobacterium tuberculosis; with phenotypic and genotypic drug susceptibility testing (DST), as well as genotyping of all positive cultures. Among 350 patients included in the study, 27 (7.7%) had culture-confirmed TBM; 84 (24.0%) had probable and 239 (68.3%) had possible TBM. DST was performed on 25/27 (92.3%) culture positive specimens; 12/25 (48.0%) had "any resistance" detected and 3 (12.0%) were multi-drug resistant (MDR). Demographic and clinical features of drug resistant and drug susceptible TBM cases were similar. Beijing was the most common genotype (20/25; 80.0%) with 9/20 (45%) of the Beijing strains exhibiting drug resistance; including all 3 MDR strains. All (4/4) isoniazid resistant strains had mutations in the katG gene; 75% (3/4) of strains with phenotypic rifampicin resistance had mutations in the rpoB gene detected by Xpert MTB/RIF®. High rates of drug resistance were found among culture-confirmed TBM cases; most were Beijing strains.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Bacterial Proteins / genetics
  • Catalase / genetics
  • Cerebrospinal Fluid / microbiology
  • Child
  • Child, Preschool
  • China / epidemiology
  • DNA-Directed RNA Polymerases / genetics
  • Drug Resistance, Bacterial*
  • Female
  • Genotype
  • Genotyping Techniques
  • Humans
  • Male
  • Microbial Sensitivity Tests
  • Middle Aged
  • Mycobacterium tuberculosis / drug effects*
  • Mycobacterium tuberculosis / isolation & purification*
  • Prevalence
  • Prospective Studies
  • Tuberculosis, Meningeal / epidemiology
  • Tuberculosis, Meningeal / microbiology*
  • Young Adult

Substances

  • Bacterial Proteins
  • Catalase
  • katG protein, Mycobacterium tuberculosis
  • DNA-Directed RNA Polymerases
  • RNA polymerase beta subunit