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Published on: February 22, 2019
[Pertussis in Poland in 2004]
1Zakład Epidemiologii Pańistwowego Zakładu Higieny, Warszawa.
Abstract:
Reemergence of pertussis in a form of epidemic was observed in Poland in 1997/1998. Since that time we observe rather sustained trend of increased incidence and shift in the age of infected to the older age groups. 2954 cases were reported in 2004, an increase from the previous year (2034 in 2003) More cases occurred among females (1668 cases, 8.5/100,000) than among males (1286 cases, 7.0/ 100,000) and in urban areas 2258 (9.6/100,000) than in the rural ones 696 (4.7/100,000). Big differences in numbers of cases reported between different districts and between urban and rural areas bring strong possibility of insufficient sensitivity of the surveillance in many regions of Poland. Since in most cases diagnosis was based on serological tests, assessment or the fraction of parapertussis cases is impossible. It remains obscure to what extend recurrence of pertussis depends solely on the shift of incidence to older ages, to the decrease of vaccine efficiency or to the independent increase of parapertussis.
Insights
Pertussis (whooping cough) reemerged in Poland, with rising cases and older infected individuals. Surveillance sensitivity and the roles of vaccine efficacy and parapertussis remain unclear.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Context:
- Pertussis (whooping cough) reemerged in Poland in 1997/1998, exhibiting an epidemic trend.
- Since then, a sustained increase in incidence and a shift towards older age groups have been observed.
- In 2004, 2954 cases were reported, a significant rise from 2003, with higher rates in females and urban areas.
Purpose:
- To analyze the epidemiological trends of pertussis reemergence in Poland.
- To investigate the demographic distribution (age, sex, location) of pertussis cases.
- To identify potential factors contributing to the sustained increase and shifts in pertussis incidence.
Summary:
- The study highlights a significant increase in pertussis cases in Poland, particularly in urban areas and among females.
- A notable shift in the age distribution of infected individuals towards older age groups was observed.
- Discrepancies in reported cases across regions suggest potential surveillance sensitivity issues, complicating accurate assessment.
Impact:
- The findings underscore the need for enhanced pertussis surveillance systems in Poland to accurately monitor disease trends.
- Understanding the factors driving pertussis recurrence, including vaccine effectiveness and co-circulation of Bordetella parapertussis, is crucial for effective control strategies.
- This research informs public health interventions aimed at managing the resurgence of pertussis in the population.
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