Microbiology Chapter 11

2. cause disease when the host’s defenses are compromised
9. cells that engulf and destroy host pathogens by means of enzymes and antimicrobial chemicals
12. individual or object from which an infection is acquired
14. relative severity of a disease caused by a particular microbe
16. enzymes secreted by microbes that break down and inflict damage on tissues
17. bacteria that provides the baby with the necessary enzymes to digest milk.
18. capable of causing disease in healthy persons with normal immune defenses
20. an organism’s potential to cause disease

1. organisms coming in from outside the body
3. microbes get past host defenses (like skin), enter tissues, and multiply
4. also known as, lipopolysaccharide (LPS), part of the outer membrane of gram-negative cell walls
5. deviation from health that results when cumulative effects of infection damage
6. a dormant state of microbes in certain chronic infectious diseases
7. organisms coming from somewhere within the same human host to cause the infection
8. long-term or permanent damage to tissues or organs caused by infectious disease
10. the sum total of all microbes found on and in a normal human.
11. a microbe whose relationship with its host is parasitic and results in infection and disease
13. habitat in the world from which a pathogen originates
15. the minimum number of microbes necessary to cause an infection.
19. hemolysins, class of bacterial exotoxin that disrupts the cell membrane of red blood cells