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Published on: November 5, 2019
Time-series analysis of meningococcal disease in Catalonia
Angela Domínguez1, Pilar Muñoz, Neus Cardeñosa
1Epidemiological Surveillance Service, Department of Health, Generalitat of Catalonia, Barcelona, Spain. angela.dominguez@gencat.net
Purpose:
In Catalonia, a region in the northeast of Spain, a rate of five cases of meningococcal disease per 100,000 inhabitants was reported during the period of 1996-1997, which was higher than in previous years. The objective of this study was to analyze the temporal behavior of serogroup B and C meningococcal disease cases in Catalonia.
Methods:
The study included confirmed cases of meningococcal disease from the 4-week period 11 of 1996 to the 4-week period 10 of 2004. A Poisson regression model (GLM) was fit for time series of serogroup B cases, whereas a zero-inflated Poisson model (ZIP) was necessary to adjust time series of serogroup C cases.
Results:
The evolution of cases in both serogroups was correlated over time. For serogroup B, there was also an association with the influenza epidemics reported in four of the seasons analyzed. For serogroup C, a positive association with three influenza epidemics and a negative association with vaccination campaigns were found. Time series analysis of meningococcal disease shows that serogroups B and C behave in a different way.
Conclusions:
The study of the evolution of each serogroup may be useful in evaluating vaccination strategies.
Insights
Meningococcal disease serogroups B and C in Catalonia showed different temporal patterns. Serogroup B cases correlated with influenza epidemics, while serogroup C cases linked to influenza and inversely to vaccination campaigns.
Area of Science:
- Epidemiology
- Infectious Disease Dynamics
- Public Health Surveillance
Background:
- Meningococcal disease incidence in Catalonia was elevated in 1996-1997.
- Analysis of temporal trends for serogroup B and C meningococcal disease is crucial for public health interventions.
Purpose of the Study:
- To analyze the temporal behavior of serogroup B and C meningococcal disease cases in Catalonia.
- To understand the epidemiological patterns of different meningococcal serogroups over time.
Main Methods:
- Time series analysis of confirmed meningococcal disease cases from 1996 to 2004.
- Application of Poisson regression models (GLM and ZIP) to analyze serogroup B and C case data respectively.
Main Results:
- Temporal evolution of serogroup B and C meningococcal disease cases were correlated.
- Serogroup B cases showed association with influenza epidemics.
- Serogroup C cases exhibited association with influenza epidemics and inverse association with vaccination campaigns.
Conclusions:
- Serogroup B and C meningococcal disease exhibit distinct temporal dynamics.
- Understanding these distinct patterns can inform and evaluate vaccination strategies for meningococcal disease.
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