Excystment

Definition

Excystment is the process by which a dormant cyst form of a microorganism, such as a protozoan, emerges into its active, vegetative state. This transition usually occurs in response to favorable environmental conditions.

5 Must Know Facts For Your Next Test

1. Excystment is triggered by environmental cues such as changes in temperature, pH, or nutrient availability.
2. The excystment process involves the breakdown of the cyst wall and reactivation of metabolic activity.
3. Protozoa like Giardia lamblia undergo excystment to transform from their cyst form to trophozoites.
4. Excystment is critical for the life cycle and pathogenicity of many parasitic eukaryotes.
5. Understanding excystment can help in developing treatments and preventive measures against parasitic infections.

Related terms

Cyst:

A dormant, resistant form of a microorganism that can survive unfavorable conditions.

Trophozoite:

The active, motile feeding stage of a protozoan parasite.

Encystment: The process by which a microorganism forms a cyst to become dormant in response to adverse conditions.