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Open Access Research article

Measles in Democratic Republic of Congo: an outbreak description from Katanga, 2010–2011

Lise Grout1*, Andrea Minetti1, Northan Hurtado2, Gwenola François2, Florence Fermon2, Anne Chatelain2, Géza Harczi3, Jean de Dieu Ilunga Ngoie4, Alexandra N’Goran1, Francisco J Luquero1, Rebecca F Grais1 and Klaudia Porten1

Author Affiliations

1 Epicentre, Paris, France

2 Médecins Sans Frontières, Paris, France

3 Médecins Sans Frontières, Lubumbashi, Democratic Republic of Congo

4 Ministry of Health, Lubumbashi, Democratic Republic of Congo

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BMC Infectious Diseases 2013, 13:232  doi:10.1186/1471-2334-13-232

Published: 22 May 2013

Abstract

Background

The Democratic Republic of Congo experiences regular measles outbreaks. From September 2010, the number of suspected measles cases increased, especially in Katanga province, where Medecins sans Frontieres supported the Ministry of Health in responding to the outbreak by providing free treatment, reinforcing surveillance and implementing non-selective mass vaccination campaigns. Here, we describe the measles outbreak in Katanga province in 2010–2011 and the results of vaccine coverage surveys conducted after the mass campaigns.

Methods

The surveillance system was strengthened in 28 of the 67 health zones of the province and we conducted seven vaccination coverage surveys in 2011.

Results

The overall cumulative attack rate was 0.71% and the case fatality ratio was 1.40%.

The attack rate was higher in children under 4 and decreased with age. This pattern was consistent across districts and time. The number of cases aged 10 years and older barely increased during the outbreak.

Conclusions

Early investigation of the age distribution of cases is a key to understanding the epidemic, and should guide the vaccination of priority age groups.

Keywords:
Measles; Disease outbreak; Mass vaccination; Africa south of the sahara; Control