Vector

Definition

A vector is an organism that transmits pathogens from one host to another, facilitating the spread of diseases. Common vectors include mosquitoes, ticks, and fleas.

5 Must Know Facts For Your Next Test

1. Vectors can transmit viruses, bacteria, and other pathogens leading to various diseases.
2. Mosquitoes are well-known vectors for diseases such as malaria, dengue fever, and Zika virus.
3. Vector-borne diseases often have complex life cycles involving the pathogen, vector, and host.
4. Control of vector populations is a key strategy in preventing the spread of vector-borne diseases.
5. Not all animals that carry a pathogen are considered vectors; only those that actively transmit it between hosts.

Review Questions

• What roles do vectors play in the transmission of pathogens?
• Name three common vectors and the diseases they transmit.
• Why is controlling vector populations important in disease prevention?

Related terms

Pathogen:

An infectious agent that causes disease in its host.

Host: An organism that harbors a pathogen or parasite.

Reservoir Host: An animal or environment where a pathogen normally lives and multiplies.