CARPHA has underscored the importance of insecticide resistance testing amid a resurgence of Chikungunya in the region.
In a statement, the Agency reminds Member States about the importance of the Integrated Vector Management approach in dealing with Chik V and other arboviral diseases such as Dengue and Zika.
These are spread through the bite of infected mosquitoes and so, CARPHA says the cornerstone of prevention and control against these mosquitoes remains source reduction.
It adds however, that an IVM approach is needed especially during outbreaks where chemical agents (spraying and fogging) are used to target adult mosquitoes to decrease the likelihood of spreading these diseases.
A core principle of IVM is Insecticide Resistance Testing studies.
It says, “With the acquisition and commissioning of CARPHA’s new Mobile Insectary Facility in October 2025, CARPHA is now capable of providing IRT (including molecular testing) to CMS. Since the start of operations, CARPHA has already completed testing for two (2) CMS using WHO approved methodologies. Additionally, the Agency is currently testing samples from four (4) CMS with the intent of bringing on two (2) additional CMS in 2026.”
CARPHA says these test results allow vector control personnel to identify the appropriate chemical agents that will have the desired effect on the mosquito populations.
As such, it guides the appropriate selection, procurement, and utilisation of the insecticides. Without these tests it would be difficult to state with certainty if use of these chemicals is beneficial to mosquito control programmes.
With regard to mosquito-borne diseases, CARPHA is encouraging families to practice personal protection tips, which can reduce exposure to mosquito-borne diseases including Dengue, Chikungunya and Zika:
- Clothing – Cover skin with long-sleeved clothing, trousers and hats
- Repellent – Use insect repellent containing DEET, Picaridin, IR 3535 & Oil of Lemon Eucalyptus
- Sleep – Protect yourself by using mosquito nets
- Home – Use screens in doors and windows
