Micrococcus

Definition

Micrococcus is a genus of Gram-positive bacteria that are spherical in shape and typically found in soil, water, and human skin. They are known for their ability to survive in a variety of environmental conditions.

5 Must Know Facts For Your Next Test

1. Micrococcus species are non-motile and form tetrads or irregular clusters.
2. They are catalase-positive, meaning they can decompose hydrogen peroxide into water and oxygen.
3. Micrococcus luteus is one of the most studied species within this genus.
4. These bacteria are generally considered non-pathogenic but can be opportunistic pathogens in immunocompromised individuals.
5. Micrococci have a high resistance to desiccation, allowing them to survive on dry surfaces for extended periods.

Review Questions

• What enzyme activity characterizes Micrococcus species?
• In what environments can Micrococcus typically be found?
• Why are Micrococci considered opportunistic pathogens?

Related terms

Staphylococcus: A genus of Gram-positive bacteria that form grape-like clusters and include several pathogenic species.

Catalase Test: A biochemical test used to identify organisms that produce the enzyme catalase.

Opportunistic Pathogen: An organism that causes disease primarily in individuals with compromised immune systems.