Select the True Statement Regarding Staphylococci and Staphylococcal Wound Infections

question 71

Multiple Choice

Select the True statement regarding staphylococci and staphylococcal wound infections.

• A) Staphylococcus aureus forms biofilms but lacks virulence factors and is not very pathogenic.
• B) Staphylococcus epidermidis produces several virulence factors, including exotoxins.
• C) Both HA-MRSA and CA-MRSA are resistant to multiple antibiotics, including sulfa drugs and tetracyclines.
• D) Some S. epidermisis strains produce superantigens that activate many helper T cells, causing a cytokine storm.
• E) S. aureus and S. epidermidis are both coagulase-positive, encapsulated organisms.

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Definitions:

Confounding Variable

A variable that is not controlled in a research investigation. In an experiment the experimental groups diĉer onboth the independent variable andthe confounding variable.

Internal Validity

Refers to how well an experiment is conducted and whether it measures what it's supposed to measure, without being confounded by other factors.

Independent Variable

A variable in an experiment that is manipulated to observe its effects on a dependent variable.

Internal Validity

The extent to which a study provides evidence that a causal relationship exists between the variables it examines, free from confounding factors.