What Is the Primary Determinant of Virulence in Streptococcus Pneumoniae

question 24

Multiple Choice

What is the primary determinant of virulence in Streptococcus pneumoniae?

• A) the ability to lyse red blood cells
• B) the presence of a particular Lancefield antigen
• C) strain-specific teichoic acids in its cell wall
• D) the presence of a polysaccharide capsule
• E) the production of pneumolysin

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Definitions:

Classical Conditioning

The process by which learning is facilitated through the connection of a stimulus from the environment with one that occurs innately, resulting in a conditioned reaction.

Operant Conditioning

A learning process in which the strength of a behavior is modified by reinforcement or punishment.

Acquisition Procedures

Methods or processes used in learning or obtaining new information, skills, or responses.

Classical Conditioning

A learning process that creates new associations between neutral stimuli and reflex-causing stimuli, famously demonstrated by Pavlov's dogs.