Introduction: In november 2021, two suspected cases of yellow fever were reported in the city of Pointe-Noire, in the southeast of the Republic of Congo. In order to assess the level of transmission of this pathology, epidemiological and entomological investigations supported by the Ministry of Health and Population of Congo and the WHO, were carried out in the targeted health areas. The two cases were observed in the District of Mvoumvou, Ngoyo and Lumumba (Tchimbamba district) in March 2022.
Objective: This study assessed the risk of transmission in these districts.
Methods: Investigations focused on the search for arbovirosis vectors and larval surveys around the homes of confirmed cases. Culicidae were collected on humans, or while resting in bedrooms (residual fauna), or using egg-laying traps.
Results: These investigations revealed the presence of Aedes aegypti (yellow fever vector) and very high stegomyial indices. Another arbovirosis vector was also identified, Aedes albopictus (Chikungunya vector).
Conclusion: The results show that the risk of yellow fever transmission is high.