| A | B |
|---|
| pathogen | organism that causes disease |
| infectious disease | one that can pass from one organism to another |
| bacteria, viruses, fungi, and protists | major groups of pathogens |
| toxin | a poison that damages cells |
| caused by viruses | rabies, polio, flu |
| caused by bacteria | strep throat, tetanus , botulism |
| carrier | organism that carries disease |
| epidemic | when large numbers of people have the same disease |
| barriers | skin, mucus, cilia |
| inflammatory response | affected area becomes warm, red, and swollen |
| immune response | cells respond to a specific pathogen with a specific defense |
| antigens | molecule that the immune system recognizes |
| antibody | molecule that binds to an antigen |
| immunity | the body's ability to destroy pathogens before they can cause disease |
| vaccine | a substance consisting of pathogens that have been weakened or killed |
| antibiotic | a chemical that kills or slows the growth of bacteria |
| resistant bacteria | those that are not killed by antibiotics |
