Enterobacteriaceae

Definition

Enterobacteriaceae is a large family of Gram-negative bacteria that includes many pathogenic genera such as Escherichia, Salmonella, and Klebsiella. These bacteria are commonly found in the intestinal tract of humans and animals.

5 Must Know Facts For Your Next Test

1. Enterobacteriaceae are facultative anaerobes, meaning they can grow in both the presence and absence of oxygen.
2. They are typically rod-shaped and can be motile or non-motile.
3. Members of Enterobacteriaceae are known for fermenting glucose with the production of acid and gas.
4. They often possess fimbriae which aid in attachment to host tissues.
5. Many species within Enterobacteriaceae exhibit antibiotic resistance, making them significant pathogens in clinical settings.

Review Questions

• What oxygen requirements do Enterobacteriaceae have for growth?
• Describe one distinguishing metabolic characteristic of Enterobacteriaceae.
• Why are some species within the Enterobacteriaceae family considered significant in clinical settings?

Related terms

Proteobacteria:

A major phylum of Gram-negative bacteria that includes a wide variety of pathogens.

Facultative Anaerobe: An organism that can grow with or without oxygen.

Selective Media:

A type of growth medium designed to favor the growth of certain microorganisms while inhibiting others.