15.2

Question 1

koch’s postulates

Answer 1

1. suspected pathogen must be found in every case of disease and not healthy individuals
2. the suspected pathogen can be isolated and grown in pure culture
3. a healthy test subject infected with the suspected pathogen must develop the signs and symptoms of disease as seen in postulate 1
4. The pathogen must be re-isolated from the new host and must be identical to the pathogen from postulate 2