Intermediate host

Definition

An intermediate host is an organism that harbors a parasite for a short transition period, during which some developmental stage is completed. This host is essential for the life cycle of the parasite but does not reach sexual maturity within it.

5 Must Know Facts For Your Next Test

1. Intermediate hosts are crucial for the development stages of many parasites, including protozoa and helminths.
2. The intermediate host differs from the definitive host, where the parasite reaches sexual maturity.
3. In cases like malaria, humans act as intermediate hosts while mosquitoes are the definitive hosts.
4. Intermediate hosts can include animals, insects, or even plants that harbor the immature forms of parasites.
5. Understanding the role of intermediate hosts helps in designing effective disease control and prevention strategies.

Review Questions

Related terms

Definitive Host:

An organism in which a parasite reaches sexual maturity.

Vector:

An organism, often an insect, that transmits pathogens from one host to another.

Reservoir Host: A primary habitat of a pathogen where it normally lives and multiplies.