What is vector-borne transmission?

Vector-borne transmission refers specifically to the transfer of pathogens via insects or animals that serve as vectors in the spread of disease. In this context, a vector is an organism that does not cause disease itself but carries pathogens from one host to another, facilitating the disease's transmission. This mode of transmission is significant in the spread of various infectious diseases, such as malaria, dengue fever, and Lyme disease, where insects like mosquitoes or ticks play a crucial role.

The other response options highlight different methods of pathogen transmission. For instance, transmission through contaminated water relates to waterborne diseases, while direct contact involves the transfer of pathogens through physical interaction between individuals. Airborne transmission pertains to diseases that are spread through airborne particles in the air. Each option describes a valid transmission method, but only the second option specifically addresses vector-borne transmission through intermediary organisms.