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Unformatted text preview: B. Factors that influence organism’s ability to cause disease 1. Size of infecting dose - must be exposed to sufficient # organisms 2. Transmission a. Spread from host to host b. Depends on organism’s ability to survive outside host 3. Portal of entry - organism must enter body in area in which it can grow, multiply (colonize) 4. Adherence to target tissue - pathogen must attach to host cells 5. Virulence of organism a. Measure of organism’s ability to cause disease, severity of disease. b. Dependent on organism’s invasiveness which is 1). Due to organism’s physical and chemical characteristics 2). Enable organism to overcome body defenses, invade, produce injury...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09