Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Does the Bcg Vaccine Have Different Effects on Strains of Tuberculosis? Publisher Pubmed



Kousha A1 ; Farajnia S2 ; Ansarin K3 ; Khalili M4 ; Shariat M5 ; Sahebi L5, 6
Authors
Show Affiliations
Authors Affiliations
  1. 1. Health Education and Promotion Department, Tabriz University of Medical Sciences, Tabriz, Iran
  2. 2. Doctoral of biotechnology, Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
  3. 3. Department of Medicine, Tuberculosis, and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
  4. 4. Doctoral of History of Iranian Traditional Medicine, Department of Basic Science, University of Medical Sciences Maragheh, Maragheh, Iran
  5. 5. Family Health Research Institute, Maternal-Fetal and Neonatal Research Center, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Doctoral of Molecular Epidemiology, Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran

Source: Clinical and Experimental Immunology Published:2021


Abstract

Several explanations have been suggested concerning the variety in bacille Calmette–Guerin (BCG) vaccine efficacy on strains of Mycobacterium tuberculosis (Mtb). This study aimed to compare the effect of BCG vaccination history in the prevention of the occurrence of Mtb-Beijing and non-Beijing strains. In this cross-sectional study, 64 patients with pulmonary tuberculosis (TB) were recruited from the Iranian border provinces (North West and West). Isolates were subjected to restriction fragment length polymorphism (RFLP) analysis, using the insertion sequence IS6110 as a probe (IS6110 RFLP) and drug susceptibility testing using the proportion method. Samples were analyzed with Gel Compare II 6.6 and spss version 18. The mean age [standard deviation (SD)] of the patients was 54·4 (SD = 17·0). Overall, 49 cases (76·56%) had no BCG vaccination scar. The prevalence of Beijing strains was 9·38% and drug resistance proportion among the isolates was 14·1% (nine cases). There was a significant relationship between Beijing strains and tuberculosis (TB)-drug resistance in isolates (χ2 = 26·29, P < 0·001). There was also a strong association between vaccination history and Beijing strains (χ2 = 13·23, P = 0·002). Also, a statistical relationship was observed between Beijing strains and drug-resistant TB among patients with a history of vaccination (χ2 = 7·47, P = 0·002). This association was not maintained in the unvaccinated group (P = 0·102). These findings confirm the claim that the vaccine has different effects on different subspecies of tuberculosis. The cause of the high probability of drug resistance in patients with Beijing-TB and vaccination history requires further investigation with a higher sample size. © 2020 British Society for Immunology
Related Docs
1. Mycobacterium Tuberculosis of the Beijing Genotype in Iran and the World Health Organization Eastern Mediterranean Region: A Meta-Analysis, Microbial Drug Resistance (2018)
2. Genomic Characteristics of Two Most Widely Used Bcg Vaccine Strains: Danish 1331 and Pasteur 1173P2, BMC Genomics (2022)
3. Genomic Evidence for Stability of the Bacillus Calmette-Guerin (Bcg) Vaccine Strain (Pasteur 1173P2) From Different Batches in Iran, Journal of Applied Microbiology (2022)
Experts (# of related papers)
View all Related Experts
Masoumeh Douraghi (2)
Leyla Sahebi (1)