Which statement best defines vector-borne diseases?

Which statement best defines vector-borne diseases?

• A. Infections transmitted by blood-feeding arthropods
• B. Infections spread through airborne droplets
• C. Diseases spread by contaminated water
• D. Diseases spread by touching contaminated surfaces

Answer: (A)

Vector-borne diseases are infections transmitted by vectors, typically blood-feeding arthropods such as mosquitoes, ticks, fleas, or sandflies. The pathogen is carried by the vector and delivered to a new host during a blood meal, so the transmission depends on the vector’s involvement. This is different from infections spread through respiratory droplets, contaminated water, or touching contaminated surfaces, which do not require a living arthropod to transfer the pathogen. Examples include viruses spread by mosquitoes (like West Nile), or illnesses spread by ticks. Recognizing this helps you assess risk based on exposure to vectors, such as travel to endemic areas or outdoor exposure where bites are possible.

Vector-borne diseases are infections transmitted by vectors, typically blood-feeding arthropods such as mosquitoes, ticks, fleas, or sandflies. The pathogen is carried by the vector and delivered to a new host during a blood meal, so the transmission depends on the vector’s involvement. This is different from infections spread through respiratory droplets, contaminated water, or touching contaminated surfaces, which do not require a living arthropod to transfer the pathogen. Examples include viruses spread by mosquitoes (like West Nile), or illnesses spread by ticks. Recognizing this helps you assess risk based on exposure to vectors, such as travel to endemic areas or outdoor exposure where bites are possible.