Haarlem 3 is the predominant genotype family in multidrug-resistant and extensively drug-resistant Mycobacterium tuberculosis in the capital of Iran: A 5-year survey

J Glob Antimicrob Resist. 2016 Jun:5:7-10. doi: 10.1016/j.jgar.2016.01.007. Epub 2016 Feb 26.

Abstract

The objective of this study was to further understand the genetic diversity of multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis isolates prevalent in Tehran, the capital city of Iran. From January 2010 to March 2015, a total of 723 M. tuberculosis strains were isolated from patients with pulmonary tuberculosis (TB). A total of 23 MDR, pre-XDR and XDR M. tuberculosis isolates were genotyped by spoligotyping and 24-loci mycobacterial interspersed repetitive unit-variable-number tandem repeat (MIRU-VNTR) typing. The results showed that the MDR, pre-XDR and XDR M. tuberculosis strains mainly belonged to the Haarlem 3 genotype (11/23; 47.8%), followed by the Beijing family (9/23; 39.1%). In addition, the 23 strains were clustered into 21 genotypes using a 24-loci MIRU-VNTR. In conclusion, Haarlem 3 genotype was the predominant genotype among the isolates from MDR-TB cases in this study, which could be of special concern.

Keywords: 24-Loci MIRU-VNTR; Haarlem 3; MDR-TB; Spoligotyping.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Extensively Drug-Resistant Tuberculosis / microbiology*
  • Female
  • Genotype*
  • Humans
  • Iran
  • Male
  • Middle Aged
  • Mycobacterium tuberculosis / genetics*
  • Mycobacterium tuberculosis / isolation & purification
  • Tuberculosis, Multidrug-Resistant / microbiology*
  • Young Adult