NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the cell arrangement of staphylococcus species on a gram stain?
A
circles
B
clusters
C
pairs
D
chains
Explanation: 

Detailed explanation-1: -Staphylococci are Gram-positive cocci about 0.5 – 1.0 m in diameter. They grow in clusters, pairs and occasionally in short chains. The clusters arise because staphylococci divide in two planes.

Detailed explanation-2: -Staphylococcus aureus is Gram-positive bacteria (stain purple by Gram stain) that are cocci-shaped and tend to be arranged in clusters that are described as “grape-like.” On media, these organisms can grow in up to 10% salt, and colonies are often golden or yellow (aureus means golden or yellow).

Detailed explanation-3: -Staphylococci are gram-positive bacteria, and their cell walls are composed of murein (32, 38, 41), teichoic acids (2), and wall-associated surface proteins (20, 26, 30). Stress-bearing murein represents a continuous macromolecular sacculus covering the whole cell.

Detailed explanation-4: -It is concluded that S. aureus fundametally divides along three definitely oriented planes that are located at right angles to each other. After cell division, the cells usually become translocated due to the action of a separation enzyme(s) to form grape-like clusters.

Detailed explanation-5: -Staphylococcus is a genus of Gram-positive bacteria in the family Staphylococcaceae from the order Bacillales. Under the microscope, they appear spherical (cocci), and form in grape-like clusters.

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