title: Mycobacterium tuberculosis and non-tuberculous mycobacteria isolates from HIV-infected patients in Guangxi, China.
abstract: BACKGROUND
  Tuberculosis (TB) remains the leading cause of death among human immunodeficiency virus (HIV) infected persons. The prevalence of infection with Mycobacterium tuberculosis and non-tuberculous mycobacteria (NTM) in HIV-infected patients in China is unknown.
  
  
  OBJECTIVE
  To estimate the prevalence of M. tuberculosis and NTM in HIV-infected patients in Guangxi Province, determine their drug resistance profiles, and evaluate the genotype patterns of M. tuberculosis strains.
  
  
  METHODS
  Samples were collected from two HIV designated hospitals in Guangxi Province between 2005 and 2008. HIV-infected patients who were culture-positive for mycobacteria were included. Drug susceptibility testing was performed for mycobacterial isolates. NTM species was identified by sequencing, and M. tuberculosis isolates were genotyped using the variable number of tandem repeats method.
  
  
  RESULTS
  M. tuberculosis and NTM were identified in respectively 117 (53%) and 102 (47%) HIV-infected patients. Drug resistance was found in 27% and multi-drug-resistant TB (MDR-TB) in 11% of the patients with TB. Previous treatment for TB was significantly associated with MDR-TB. Twenty (17%) TB patients belonged to eight VNTR-defined clusters.
  
  
  CONCLUSIONS
  The high frequency of NTM among HIV-infected patients raises concerns about accurate species identification before the determination of appropriate treatment. The potential for TB transmission exists among HIV-infected patients. Intensified screening and effective treatment of TB-HIV co-infected patients is urgently needed.
authors: Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning, Guangxi, China.
authors: R
authors: R
authors: Lan
authors: C
authors: C
authors: Yang
authors: L
authors: L
authors: Lan
authors: J
authors: J
authors: Ou
authors: K
authors: K
authors: Qiao
authors: F
authors: F
authors: Liu
authors: Q
authors: Q
authors: Gao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015373:Bacterial Typing Techniques; D002681:China / Q000453:epidemiology; D024881:Drug Resistance, Bacterial; D005260:Female; D005838:Genotype; D015658:HIV Infections / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009165:Mycobacterium Infections, Nontuberculous / Q000150:complications / Q000453:epidemiology / Q000382:microbiology; D009169:Mycobacterium tuberculosis / Q000235:genetics / Q000302:isolation & purification*; D009170:Nontuberculous Mycobacteria / Q000235:genetics / Q000302:isolation & purification*; D015995:Prevalence; D012189:Retrospective Studies; D020080:Tandem Repeat Sequences; D014376:Tuberculosis / Q000150:complications / Q000453:epidemiology / Q000382:microbiology; D018088:Tuberculosis, Multidrug-Resistant / Q000150:complications / Q000453:epidemiology / Q000382:microbiology; D055815:Young Adult