Ascertaining in vivo virulence of Mycobacterium tuberculosis lineages in patients in Mbeya, Tanzania

Int J Tuberc Lung Dis. 2015 Jan;19(1):70-3. doi: 10.5588/ijtld.14.0403.

Abstract

We evaluated the relationship between the degree of immunodeficiency indicated by the number of circulating CD4+ T-cells and Mycobacterium tuberculosis lineages identified by spoligotyping and mycobacterial interspersed repetitive units-variable number of tandem repeats genotyping in human immunodeficiency virus (HIV) infected individuals with pulmonary tuberculosis from Mbeya, Tanzania. Of M. tuberculosis strains from 129 patients, respectively 55 (42.6%) and 37 (28.7%) belonged to Latin American Mediterranean and Delhi/Central-Asian lineages, while 37 (28.7%) patients were infected with other strains. There was no difference in the distribution of M. tuberculosis lineages among patients with early or advanced stages of HIV infection (P = 0.785), indicating that the virulence of strains from these lineages may not be substantially different in vivo.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Bacterial Typing Techniques
  • CD4-Positive T-Lymphocytes / cytology
  • Cohort Studies
  • DNA, Bacterial / isolation & purification
  • Female
  • Genetic Loci
  • Genotyping Techniques
  • HIV Infections / drug therapy
  • HIV Infections / epidemiology*
  • HIV Infections / microbiology
  • Humans
  • Male
  • Mycobacterium tuberculosis / genetics*
  • Mycobacterium tuberculosis / pathogenicity
  • Tandem Repeat Sequences
  • Tanzania
  • Tuberculosis, Pulmonary / drug therapy
  • Tuberculosis, Pulmonary / microbiology*
  • Virulence

Substances

  • DNA, Bacterial