Podcast
Questions and Answers
Which of the following is a characteristic of Corynebacterium species?
Which of the following is a characteristic of Corynebacterium species?
- Gram negative cocci
- Gram positive bacilli (correct)
- Obligate anaerobes
- Motile with flagella
What is the staining characteristic of metachromatic granules in many corynebacteria?
What is the staining characteristic of metachromatic granules in many corynebacteria?
- Gram stain
- Acid-fast stain
- Ziehl-Neelsen stain
- Alberts stain (correct)
What is the family to which Corynebacterium belongs?
What is the family to which Corynebacterium belongs?
- Pseudomonadaceae
- Enterobacteriaceae
- Mycobacteriaceae (correct)
- Streptococcaceae
What is the arrangement of daughter cells during division in some Corynebacterium species?
What is the arrangement of daughter cells during division in some Corynebacterium species?
What is the typical size of colonies of Corynebacterium on blood agar?
What is the typical size of colonies of Corynebacterium on blood agar?
Many corynebacteria possess ______, which are reserve phosphate polymers
Many corynebacteria possess ______, which are reserve phosphate polymers
In stained smear they occur singly, in palisades arrangement of parallel cells and in angular clusters resembling ______
In stained smear they occur singly, in palisades arrangement of parallel cells and in angular clusters resembling ______
Corynebacterium species are small, pleomorphic Gram positive ______, occur in club and rod forms
Corynebacterium species are small, pleomorphic Gram positive ______, occur in club and rod forms
The cell wall of some species is weaker at one end resulting in club-shape and during division the daughter cells remained attached to one side, resulting in L and V arrangement referred to them as ______
The cell wall of some species is weaker at one end resulting in club-shape and during division the daughter cells remained attached to one side, resulting in L and V arrangement referred to them as ______
Colonies on blood agar are typically small (1 to 2 mm) and mostly ______
Colonies on blood agar are typically small (1 to 2 mm) and mostly ______
Study Notes
Characteristics of Corynebacterium Species
- Corynebacterium species are small, pleomorphic Gram-positive bacteria that occur in club and rod forms.
- They possess metachromatic granules, which are reserve phosphate polymers.
- In stained smears, they occur singly, in palisades arrangement of parallel cells, and in angular clusters resembling Chinese characters.
Colony Characteristics
- Colonies on blood agar are typically small (1-2 mm) and mostly grayish-white.
Cell Division and Arrangement
- The cell wall of some species is weaker at one end, resulting in a club-shape.
- During division, the daughter cells remain attached to one side, resulting in an L and V arrangement, referred to as raspberries.
Classification
- Corynebacterium belongs to the family Corynebacteriaceae.
Metachromatic Granules
- The staining characteristic of metachromatic granules in many corynebacteria is a distinct feature of this species.
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Description
Test your knowledge of Corynebacterium with this quiz! Learn about the general characteristics, genus, and family of this Gram-positive bacilli, including its membership in the CMN group and specific traits such as non-motility, catalase and oxidase positivity, and aerobic nature.
