Which statement about Koch's postulates is INCORRECT?
A) Koch's postulates are a set of rules to identify the microorganism that causes a particular disease.
B) The microorganism that supposedly causes the disease must be present in all incidences of the disease.
C) If a microorganism is isolated and purified from a diseased individual and subsequently causes disease symptoms when injected into a healthy host, there is suggestive evidence that the microorganism causes the disease.
D) Isolation of a microorganism from a diseased individual is sufficient evidence for that organism being the causative agent of the disease.
E) The final step of Koch's rules is to compare the original pure culture with the culture isolated from the experimentally injected host..

Question

Quizplus · Accepted Answer

Isolation of a microorganism from a diseased individual alone is not sufficient to prove causation according to Koch's postulates. The organism must also be isolated, grown in pure culture, and shown to cause the disease when reintroduced into a healthy host, among other criteria.

Which Statement About Koch's Postulates Is INCORRECT