Certification Board for Sterile Processing and Distribution (CBSPD) Sterile Processing Technician Practice Exam

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Which structure is characteristic of Staphylococcus species?

  1. Round-shaped Gram-Negative

  2. Rod-shaped Gram-Positive

  3. Round-shaped Gram-Positive

  4. Spiral-shaped Gram-Positive

The correct answer is: Round-shaped Gram-Positive

The structure characteristic of Staphylococcus species is round-shaped Gram-Positive. Staphylococcus bacteria are cocci, meaning they are spherical or round in shape. When subjected to Gram staining, Staphylococcus species retain the crystal violet stain, appearing purple under a microscope, which indicates that they are Gram-Positive. This characteristic morphology and staining reaction are fundamental in the identification of these bacteria in laboratory settings. Understanding the shape and Gram reaction is essential for proper identification and treatment. Other shapes and staining characteristics listed do not apply to Staphylococcus, reinforcing why recognizing their specific traits is crucial for microbiological studies.

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