Legionnaires’ disease: overview of the situation concerning notification in Wallonia (Belgium) in 2012, a retrospective descriptive study based on a capture-recapture method
Categorie(s):
Health
Author(s):
Stéphanie Jacquinet(1)*, Olivier Denis(2,3), Filomena Valente Soares(3) and Carole Schirvel(1)
Keyword(s):
Legionnaires’ disease, Surveillance, Belgium
DOI:
Abstract :
Background: Legionnaires’ disease is a severe form of pneumonia, and although public health medical inspectors
must be notified, it is often under-reported. The objectives of this study were to determine the completeness rate
of notification of Legionnaires’ disease and to estimate the incidence of this disease in Wallonia, the southern part
of Belgium, in 2012.
Method: This retrospective, transversal descriptive study was based on a capture-recapture method using two
sources. An estimation of the total number of Legionnaires’ disease cases was calculated using Chapman and
Seber’s estimators for small numbers, thereby allowing us to estimate the real incidence of this disease in Wallonia
as well as the completeness rate of notification.
Results: The total number of estimated Legionella cases for 2012 was 45 (IC 95%:41–48) and the completeness rate
was 65% (IC 95%:61-70%). The estimated incidence of Legionnaires’ disease in Wallonia was 1.27/100,000 inhabitants.
Conclusions: The notification rate of Legionella must be improved in Wallonia. Doctors should be made aware of the
importance of diagnosing and reporting Legionnaires’ disease.