Investigation d’une épidémie de coqueluche à Dialakon, Mali, 2016

Introduction: From January 2008 to June 2016, Mali reported no cases of pertussis. In July 2016, Bafoulabé reported 38 suspected cases of pertussis in the village of Djombomadji in Dialakon. The objective this investigation was to describe this outbreak in time, place and person. Methods: We conducted a descriptive cross-sectional study in Dialakon from March to August 2016. A suspected case of pertussis was any person presenting paroxysmal cough with or without vomiting, fever, dyspnoea or sneezing. We conducted an active case search. Data were collected using a questionnaire and analysed for time, place and person. Results: A total of 112 suspected cases of pertussis were recorded out of 7238 inhabitants (attack rate: 16/1000) with zero deaths. The median age was 4 years, range 3 months-13 years, 52% were female. Of the cases, 4% were fully vaccinated against pertussis. All cases were from the village of Djombomadji. The epidemic started on 10 March, with two peaks on 16 May and 16 June 2016, with 20 and 16 cases respectively. The number of cases then gradually decreased until 26 July 2016 when the last 2 cases were recorded. Conclusions: The epidemic lasted 5 months, the majority of cases occurred on 16 May 2016, (they)were female, unvaccinated and from Djombomadji village. All cases were treated, unvaccinated children were vaccinated and the population was sensitised.