About Bioline  All Journals  Testimonials  Membership  News

The Journal of Health, Population and Nutrition
ISSN: 1606-0997
EISSN: 1606-0997
Vol. 31, No. 1, 2013, pp. 1-10
Bioline Code: hn13001
Full paper language: English
Document type: Research Article
Document available free of charge

The Journal of Health, Population and Nutrition, Vol. 31, No. 1, 2013, pp. 1-10

 en IS6110 Restriction Fragment Length Polymorphism Typing of Drug-resistant Mycobacterium tuberculosis check for this species in other resources Strains from Northeast South Africa
Green, Ezekiel; Obi, Lawrence C.; Okoh, Anthony I.; Nchabeleng, Maphoshane; de Villiers, Babsie E.; Letsoalo, Tomas; Hoosen, Anwar A.; Bessong, Pascal O. & Ndip, Roland N.


Tuberculosis (TB) remains a deadly infectious disease affecting millions of people worldwide; 95% of TB cases, with 98% of death occur in developing countries. The situation in South Africa merits special attention. A total of 21,913 sputum specimens of suspected TB patients from three provinces of South Africa routinely submitted to the TB laboratory of Dr. George Mukhari (DGM) Hospital were assayed for Mycobacterium tuberculosis check for this species in other resources (MTB) growth and antibiotic susceptibility. The genetic diversity of 338 resistant strains were also studied. DNA isolated from the strains were restricted with Pvu II, transferred on to a nylon membrane and hybridized with a PCR-amplified horseradish peroxidase 245 bp IS6110 probe. Of the 338 resistant strains, 2.09% had less than 5 bands of IS6110, and 98% had 5 or more bands. Unique restriction fragment length polymorphism (RFLP) patterns were observed in 84.3% of the strains, showing their epidemiological independence, and 15.7% were grouped into 22 clusters. Thirty-two strains (61.5%) from the 52 that clustered were from Mpumalanga, 16/52 (30.8%) from Gauteng, and 4/52 (9.6%) from Limpopo province. Clustering was not associated with age. However, strains from male patients in Mpumalanga were more likely to be clustered than strains from male patients in Limpopo and/or Gauteng province. The minimum estimate for the proportion of resistant TB that was due to transmission is 9.06% (52-22=30/331). Our results indicate that transmission of drug-resistant strains may contribute substantially to the emergence of drug-resistant tuberculosis in South Africa.

Drug resistance; Epidemiology; IS6110; M. tuberculosis; PCR-RFLP; South Africa

© Copyright 2012 - The Journal of Health, Population and Nutrition
Alternative site location:

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2023, Site last up-dated on 01-Sep-2022.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Google Cloud Platform, GCP, Brazil