Which term is used to describe organisms that carry pathogens from one host to another?

The term used to describe organisms that carry pathogens from one host to another is "vectors." Vectors are typically living organisms, such as insects or other arthropods, that transport pathogens between different hosts, facilitating the spread of diseases. For example, mosquitoes are vectors for diseases like malaria and dengue fever because they carry the parasites or viruses and transmit them when they bite humans.

In contrast, hosts refer to the organisms that are infected by the pathogen, while reservoirs are environments or organisms in which a pathogen can live and multiply without causing disease. Carriers are individuals who, while not showing symptoms of a disease, can still spread the pathogen to others. However, the most accurate term specifically relating to the act of transferring pathogens between hosts is "vectors."