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What type of surveillance method uses a paper-towel-wrapped tongue depressor immersed in a one-pint black jar that has been half-filled with water?

A. Adult mosquito surveillance
B. Larval mosquito surveillance
C. Arbovirus surveillance
D. Insecticide resistance surveillance

Answer :

Final answer:

The method involving a paper-towel-wrapped tongue depressor in a jar half-filled with water is used for larval mosquito surveillance, aimed at monitoring and managing mosquito populations to control the spread of mosquito-borne diseases.

Explanation:

The surveillance method that uses a paper-towel-wrapped tongue depressor emerged in a one-pint, black jar that has been half-filled with water is a technique designed for larval mosquito surveillance. This method targets the early life stages of mosquitoes by attracting and capturing the larvae for monitoring purposes. Since mosquito larvae, often referred to as ‘wigglers,’ get their air by poking a breathing tube through the water surface, the submerged paper-towel-wrapped tongue depressor in the water-filled jar serves as an attractive site for female mosquitoes to lay eggs. Once the eggs hatch, the larvae can be easily collected, identified, and counted, helping scientists and health officials to monitor and manage mosquito populations, particularly those species that are capable of transmitting dangerous diseases like dengue, Zika, and malaria. This approach is critical in understanding the distribution of mosquito larvae in specific areas, enabling targeted mosquito control efforts.

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