Invasive Meningococcal Disease. 2021-2022 season
DOI:
https://doi.org/10.4321/s2173-92772023000200001Keywords:
Invasive meningococcal disease, IMD, Neisseria meningitidis, Spain, Epidemiological analysis, 2021/22 SeasonAbstract
Introduction: The National Epidemiological Surveillance Network (RENAVE) has among its functions the systematic collection of epidemiological information, its analysis and interpretation, and the dissemination of the results. This report shows the information on invasive meningococcal disease related to the 2021/22 epidemiological season.
Method: Descriptive epidemiological analysis of cases of IMD reported to the National Epidemiological Surveillance Network, season 2021/22. The variables analysed were: sex, age, date of symptom onset, place of residence, death and serogroup of the pathogenic agent.
Results: There were 108 confirmed cases of IMD (incidence rate of 0.23), 54.6% were males. The highest TI was observed in children under 1 year of age, with a TI of 5.16. Serogroup B produced the greatest increase in cases with respect to the previous season and was the most frequently isolated (48.1% of the cases). The number of cases reported for serogroups W, Y and C was low. The percentage of cases with ungroupable and unknown serogroups was 34.3% respectively.
Conclusions: During the 2021/22 season, confirmed cases increased by 66% compared to the previous season, but the number of cases reported was 72.6% lower than in pre-pandemic seasons. A high percentage of cases have been reported for ungroupable and unknown serogroups. It is important to have complete microbiological characterization data for surveillance.
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