Dengue control

Vector surveillance

Surveillance on Ae. aegypti density is important in determining factors related to dengue transmission, in order to prioritize areas and seasons for vector control. Selection of appropriate surveillance strategies are based upon outcome/objective, also taking into consideration time, resources, and infestation levels.

Additionally, vector surveillance is required to sustain the control measures and detect any increase in vector density.

The most used indicators for vector surveillance are:

Larval surveys:

House index (HI): percentage of houses infested with larvae and/or pupae.

Container index (CI): percentage of water-holding containers infested with larvae or pupae.

Breteau index (BI): number of positive containers per 100 houses inspected.

Pupae surveys:

Pupa index (PI): number of pupae per 100 houses inspected.

Adult surveys:

Estimating adult population density using ovitraps, sticky traps, human landing collections or any similar traps.

Additional information is available on vector surveillance equipment in Dengue guidelines, Chapter 5.2.2.