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What are the 4 major general characteristics of Enterobacteriaceae?
What are the 4 major general characteristics of Enterobacteriaceae?
- All ferment glucose. 2. All reduce nitrates to nitrites. 3. None produce cytochrome oxidase. 4. All are motile with flagellar arrangement as peritrichous.
Name 3 non-motile enterics within Enterobacteriaceae.
Name 3 non-motile enterics within Enterobacteriaceae.
- Klebsiella 2. Shigella 3. Yersinia
What are the microscopic and colonial morphology characteristics of Enterobacteriaceae?
What are the microscopic and colonial morphology characteristics of Enterobacteriaceae?
Gram-negative, non-spore-forming, facultative anaerobe bacilli
Which culture media have little value in the identification differential of Enterobacteriaceae?
Which culture media have little value in the identification differential of Enterobacteriaceae?
According to Ewing (1963), what did he propose for classifying the members of the family Enterobacteriaceae?
According to Ewing (1963), what did he propose for classifying the members of the family Enterobacteriaceae?
Flashcards
Enterobacteriaceae characteristics?
Enterobacteriaceae characteristics?
All ferment glucose, reduce nitrates to nitrites, do not produce cytochrome oxidase, and are motile with peritrichous flagella.
Non-motile Enterobacteriaceae?
Non-motile Enterobacteriaceae?
Klebsiella, Shigella, and Yersinia are non-motile members of Enterobacteriaceae.
Microscopic traits of Enterobacteriaceae?
Microscopic traits of Enterobacteriaceae?
Gram-negative, non-spore-forming, facultative anaerobe bacilli.
Media with little differential value?
Media with little differential value?
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Ewing's classification proposal?
Ewing's classification proposal?
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Study Notes
Characteristics of Enterobacteriaceae
- The family Enterobacteriaceae has four major general characteristics: Gram-negative, non-spore-forming, rod-shaped, and fermentative.
Motility of Enterobacteriaceae
- Not all Enterobacteriaceae are motile, and three examples of non-motile enterics are Klebsiella, Shigella, and Edwardsiella.
Microscopic and Colonial Morphology
- Enterobacteriaceae are typically 1-5 μm in length, and their colonies are 2-3 mm in diameter, circular, and smooth.
- They may appear as short rods, rods, or even coccobacilli under a microscope.
Culture Media for Identification
- Some culture media, such as MacConkey agar, have little value in the identification differential of Enterobacteriaceae.
Classification of Enterobacteriaceae
- Ewing (1963) proposed a classification system for the members of the family Enterobacteriaceae based on their biochemical reactions, which is still widely used today.
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