Invasiveness refers to a pathogen's ability to:
1. produce endotoxins in greater abundance.
2. multiply more rapidly.
3. increase its virulence.
4. penetrate anatomic barriers more easily.
Correct Answer: 2
Rationale 1: Invasiveness is not related to the production of endotoxins.
Rationale 2: Invasiveness is the term for the ability of a pathogen to grow rapidly.
Rationale 3: Virulence is the measure of an organism's pathogenicity.
Rationale 4: Invasiveness is not related to the ability of certain pathogens to penetrate anatomic barriers.
Global Rationale: Invasiveness is the ability of a pathogen to grow extremely rapidly and cause direct damage to surrounding tissues by their sheer numbers. Because a week or more may be needed to mount an immune response against the organism, this exponential growth can rapidly overwhelm body defenses and disrupt normal cellular function.
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