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MIC 121 Mcb compilations Objective Question

Question

Which of the following is not true about Koch's postulates?
Options
A The specific pathogen must be isolated from diseased host and grown in pure culture
B The pathogen from the pure culture must cause the disease when inoculated into a healthy, susceptible host
C The pathogen must be present in all cases of the disease
D The pathogen must not be re-isolated from the new host
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

One of Koch's postulates states that the same pathogen must be re-isolated from the experimentally diseased host. Therefore, the statement 'The pathogen must not be re-isolated from the new host' is incorrect.

Hint

Recall the four main points of Koch's postulates. What happens to the pathogen after it infects a new host and causes disease?

Question Info