What is meant by vector-borne transmission?

Vector-borne transmission refers specifically to the process by which pathogens are transferred from one host to another by a living organism, typically an insect. This mode of transmission involves vectors, such as mosquitoes, ticks, or fleas, which carry the disease-causing microorganisms and enable their transfer between hosts, often during the feeding process. For example, when a mosquito bites an infected person or animal, it can ingest pathogens such as viruses or parasites and later transmit them to another person or animal through subsequent bites.

This type of transmission is significant in understanding the spread of various diseases, such as malaria, dengue fever, and Lyme disease, highlighting the role of vectors in epidemiology and public health. The necessity for controlling vector populations and preventing bites becomes crucial to reducing disease incidence. The other choices describe alternative modes of transmission that do not involve living carriers; for instance, contaminated surfaces, air particles, or direct contact with infected individuals.