Pathogenicity refers to an organism's ability to:
1. cause disease.
2. penetrate anatomic barriers more easily.
3. multiply more rapidly.
4. use oxygen.
Correct Answer: 1
Rationale 1: Some pathogens are extremely infectious, while others produce no symptoms at all. Pathogenicity refers to an organism's ability to cause disease.
Rationale 2: Certain bacteria secrete hyaluronidase, which allows them to penetrate anatomic barriers more easily.
Rationale 3: Invasiveness is the term for the ability of a pathogen to grow rapidly.
Rationale 4: Pathogenicity is not related to whether bacteria are aerobic or anaerobic.
Global Rationale: Some pathogens are extremely infectious and life threatening to humans, whereas others simply cause annoying symptoms or none at all. Pathogenicity, the ability of an organism to cause disease, depends on an organism's speed of reproduction and its skill in bypassing or overcoming body defenses.
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