Which of the following is not necessary to satisfy Koch's postulates?
A) The organism must cause disease through toxin production.
B) The organism must be grown in pure culture outside the diseased host.
C) The organism must be re-isolated from the experimentally infected diseased animal and shown to be identical to the original isolate.
D) The organism must be present in every case of the disease.
E) The organism must cause the disease when introduced from pure culture into a healthy host.
Ans: A) The organism must cause disease through toxin production.
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What will be an ideal response?
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Indicate whether the statement is true or false