| A | B |
| pathogen | a "bad" bacteria or virus |
| epidemic | severe outbreak of a disease |
| incubation period | period of carrying the pathogen, but not exhibiting symptoms |
| allergy | incomplete reaction to an antibody |
| cocci | round bacteria (cocci = ball) |
| antigen | a foreign substance in the body |
| histamine | an irritant in blodd that responds to invading bacteria |
| bacilli | rod-shaped bacteria (like a 'bat') |
| resistance | the ability to fight off an infection at a certain time |
| hereditary disease | inherited thru DNA from your parents |
| spirilli | spiral-shaped bacteria |
| antibody | created by immune system - kills antigens |
| auto-immune disease | body's own immune system attacks itself |
| virulence | the degree of damage a pathogen can cause |
| infection | contagious microbe is passed from person to person |
| contagious | when a disease can be passed from person to person |
| vector | any organism which helps to pass on an infection (like mosquitoes) |
| immunity | when the body fights off an infection and cannot contract that infection ever again |
| aerobic bacteria | bacteria which need oxygen to survive |
| anaerobic bacteria | bacteria which do not require oxygen - they use Carbon dioxide |