Emergencies preparedness, response

2002 - Yellow fever in Senegal - Update 4

01 November 2002

Disease Outbreak Reported

As of 31 October, the Ministry of Health has confirmed 45 cases and 4 deaths of yellow fever. The outbreak has affected Touba, Mbacké and Bambey districts, Diourbel region; Gossas and Fatick districts, Fatick region and Tambacounda district in Tambacounda region (see previous report). Thirty-three cases were reported from Touba where urban transmission was occurring. The date of onset of illness for the 2 most recent confirmed cases was 20 October and these cases were detected in Fatick and Tambacounda district.

Surveillance has been intensified in all districts in the country, including active surveillance in Dakar. To date, there has been no evidence of virus transmission in Dakar.

The ongoing immunization campaigns in Diourbel region have achieved coverage rates of 94-99% (Touba = 99%) and no cases have been confirmed in this region since 14 October.

An immunization campaign has begun in Gossas and Fatick districts, and one is planned for Tambacounda district, but additional vaccine and operational support are needed to begin the campaign.

Laboratory testing is being performed by the WHO Collaborating Centre at the Institut Pasteur in Dakar (IPD). The Institut de Recherche pour le Développement and IPD are carrying out entomological investigations, and with WHO have been assisting the Ministry of Health with surveillance and epidemiological investigations.

WHO is supporting the immunization campaign with both technical assistance and vaccine supplies. In response to an appeal for financial support for the outbreak response, WHO wishes to acknowledge the support of the Government of Norway and UNFPA.