Vector Surveillance is the analysis and interpretation of systematically collected entomological data for facilitating appropriate decisions on vector control. Vector surveillance is an important and essential component of the dengue control programme, as the information generated from vector surveillance guides the vector control programme and helps for early warning and epidemic forecasting.

Objectives of Dengue Vector Surveillance

• To determine the breeding sites of dengue vector mosquitoes
• To describe the temporal and spatial distribution of vector mosquitoes
• To describe seasonal fluctuations of vector population
• To determine feeding and resting habits of vector mosquitoes (vector bionomics/ behaviour)
• To forecast outbreaks and early warning
• To determine the effectiveness of vector control interventions used for dengue vector control

Types of Dengue Vector Surveillance

Dengue vector surveillance is carried out regularly at sentinel sites and or routine sites. Surveillance at spots (spot checks) is carried out in special localities and circumstances based on environmental and epidemiological information.

Vector Surveillance System in The Country

Vector surveillance is carried out by the NDCU in cooperation with Anti Malaria Campaign (AMC), Anti Filariasis Campaign (AFC) and Medical Research Institute (MRI). In addition to central level offices, these institutions have their district level offices headed by Regional Malaria/ Medical officers (RMOO), Medical officers of AFC or Entomologist who are responsible for planning, implementation, monitoring and evaluation of entomological surveillance at the district level. Currently, 172 entomological teams are deployed for entomological surveillance at the central and district level offices of the AMC, AFC and MRI.