36. Define Pathogenicity, Virulence, opportunist pathogen, infectious disease
- Pathogenicity: Ability for a microbe to cause a DISEASE in the host
- Virulence: The Degree of this pathogenicity (highly virulent-more likely to cause disease)
- Opportunistic Pathogen: Microbe able to cause disease ONLY when host immune system is compromised.
- Infectious Disease: Contageous diseases. Infectious dose is the minimum # of pathogens required to cause Disease SYMPTOMS. (LOWER THE ID #, the Better able to TRANSMIT disease).