[Analysis of polio antibody levels in healthy population in Beijing in 2007]
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Published on: June 24, 2025
Xiao-mei Li1, He-run Zhang, Yu-mei Wang
1Beijing Municipal Center for Disease Control and Prevention, Beijing 100013, China.
Insights
This study found high poliomyelitis antibody levels in healthy Beijing residents, indicating a strong community immunity. The findings suggest a stable immunization barrier has been established in the population.
Area of Science:
- Immunology
- Public Health
- Epidemiology
Context:
- Poliomyelitis remains a global health concern, necessitating ongoing surveillance of population immunity.
- Beijing, a major metropolitan area, serves as a key location for assessing public health interventions.
- Understanding antibody levels is crucial for evaluating the effectiveness of vaccination programs.
Purpose:
- To assess the poliomyelitis antibody levels in a healthy population in Beijing.
- To determine the seroprevalence and geometric mean titers (GMT) of poliovirus antibodies (types I, II, and III).
- To investigate the association of antibody levels with demographic factors such as age and time since immunization.
Summary:
- A study of 1552 healthy individuals in Beijing revealed high antibody-positive rates for poliovirus types I, II, and III (97.04%, 97.29%, and 91.04%, respectively).
- Geometric mean titers (GMT) were 1:70.05, 1:54.60, and 1:31.83 for types I, II, and III, respectively.
- GMTs showed a significant decrease with increasing age and time since immunization, but no significant differences were observed based on gender, residency, or region.
Impact:
- The findings indicate a robust immunization barrier against poliomyelitis in Beijing's healthy population.
- This study provides valuable data for public health officials to maintain and monitor vaccination strategies.
- The results support the continued success of polio eradication efforts in urban settings.
Objective:
To investigate the poliomyelitis antibody level in healthy people in Beijing.
Methods:
10 age groups (0, 1 to 4, 5 to 9, 10 to 14, 15 to 19, 20 to 24, 25 to 29, 30 to 34, 35 to 39, and > or = 40) were sampled by the Multi-stage stratified sampling method in 7 districts in Beijing, and 1552 sera from healthy population were collected. The poliomyelitis antibody was determined with microcell neutralization method.
Results:
The neutralized antibody-positive rate for polio I, II, III were 97.04%, 97.29% and 91.04% respectively, the geometric mean titers (GMT) were 1:70.05, 1:54.60, and 1:31.83 respectively. A trend of decreasing was observed in the GMTs with increasing age and years after immunization. There were no significant differences in antibody levels between different gender, residents or regions. The results of multiple-factors analysis showed that the GMTs were significantly associated with age and the years after immunization.
Conclusion:
A stable immunization barrier has been established in healthy population in Beijing.
