BACKGROUND:
Measles is a disease caused by a virus of the paramyxoviridae family. The measles virus is usually transmitted through direct contact or through the air, infecting the respiratory tract and then spreading throughout the body. A measles outbreak has been reported in the commune of N'beika by the Regional Health Directorate of Tagant. After the confirmation of the epidemic in the laboratory, it became necessary to carry out an investigation of this epidemic in order to take stock of the situation.

METHODS:
A descriptive cross-sectional study was conducted from 07 to 14 January 2024 on suspected measles cases in the Tagant region, an active search was conducted at the level of the health facilities of the districts that reported cases in order to search the health facilities for cases that comply with the case definition. The data were analysed with Epi info7.2 and presented in the form of tables, graphs and map.

RESULTS:
A total of 59 cases of measles have been reported as of 14/01/2024, including 6 laboratory-confirmed cases and 53 cases confirmed by epidemiological link, 56% of the cases are female, the sex ratio (F / H) = 1.3. The mean age was 17 years ± 13 years. The adult age group is the most affected by measles and followed by the 5-14 year age group. Of the reported cases, 98% of measles cases were unvaccinated. The patients presented with fever, rash and cough.

DISCUSSION:
The epidemic has been confirmed by the laboratory of the National Institute of Public Health Research, the commune of N'beika has notified 98% of the cases. The response to the epidemic has led to good case management and the organization of a response vaccination campaign that has vaccinated 428 people aged 12 months to 50 years.