1.
Observe the microorganism in the sick host.
2.
Grow the microorganism in pure culture.
3.
Inoculate the microorganism into a healthy, susceptible host-and
cause symptoms in that host.
4.
Isolate the microorganism in pure culture.
| Mouse
over the numbers to read the steps.

Click on the Quiz button to test your understanding
of Koch's Postulates.  |
|
|