Biological vector

Definition

A biological vector is an organism that transmits pathogens from one host to another, where the pathogen undergoes part of its life cycle within the vector. Common examples include mosquitoes transmitting malaria and ticks spreading Lyme disease.

5 Must Know Facts For Your Next Test

1. Biological vectors are essential for the life cycle of certain pathogens, such as Plasmodium species in mosquitoes.
2. They differ from mechanical vectors, which do not support the pathogen's life cycle.
3. Mosquitoes, ticks, and fleas are common biological vectors.
4. The transmission can occur through bites or other forms of direct contact with the vector.
5. Control of biological vectors is a crucial strategy in preventing diseases like malaria and dengue fever.

Review Questions

• What distinguishes a biological vector from a mechanical vector?
• Name three common diseases transmitted by biological vectors.
• How do biological vectors contribute to the spread of pathogens?

Related terms

Mechanical Vector: An organism that transmits pathogens without being infected itself.

Pathogen: A microorganism that causes disease in its host.

Host: An organism that harbors a pathogen or parasite, often providing nourishment and shelter.