Related Experiment Videos
First tuberculosis prevalence survey in KwaZulu
South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|September 8, 1979
Summary
A 1974 KwaZulu tuberculosis (TB) prevalence survey found a 1.4% annual infection rate. While active TB and miliary TB were detected, the data suggests a downward trend, warranting further investigation.
Area of Science:
- Epidemiology
- Public Health
- Infectious Disease
Background:
- Tuberculosis (TB) remains a significant global health concern.
- Understanding TB prevalence is crucial for effective control strategies.
- Previous epidemiological data from KwaZulu was limited.
Purpose of the Study:
- To determine the prevalence of tuberculosis in KwaZulu in 1974.
- To assess the TB infection rate and identify trends.
- To provide baseline data for future public health interventions.
Main Methods:
- A stratified 3-stage sampling technique surveyed 3,789 individuals across 10 sites in KwaZulu.
- Tuberculin skin tests (Heaf and Mantoux) were administered to 1,769 children.
- Radiographs and sputum microscopy/culture were used to diagnose active TB in individuals aged 15 and older.
Main Results:
- BCG vaccination scars were present in 28.7% of children under 18.
- Active TB was diagnosed in 2.7% of radiographs, with 0.3% miliary TB.
- Sputum analysis revealed a 1.3% positive rate for TB, with 0.8% confirmed by culture for Mycobacterium tuberculosis.
Conclusions:
- The calculated annual TB infection rate was 1.4%, indicating a potential downward trend.
- The findings highlight the need for continued surveillance and a follow-up survey in 5 years.
- This study provides essential epidemiological data for TB control in KwaZulu.