Which method of transmission involves pathogen transfer through a vector?

The method of transmission that involves pathogen transfer through a vector is classified as vector-borne transmission. In this context, a vector refers to an organism, often an insect or arthropod, that carries a pathogen from one host to another. Common examples include mosquitoes transmitting malaria or ticks conveying Lyme disease. Vectors play a crucial role in the life cycle of many pathogens, facilitating their spread in the environment and among populations.

Other transmission methods, while relevant, do not involve vectors. Airborne transmission refers to the spread of pathogens through the air, often via aerosols or dust particles. Contact transmission involves direct or indirect physical interaction between individuals or surfaces. Vehicle transmission refers to the transfer of pathogens via contaminated materials or substances, like water or food. Each of these methods represents distinct mechanisms of pathogen spread, but only vector-borne transmission specifically highlights the role of an intermediary organism in transferring the pathogen.