Question

Which of the following is the Least accurate statement about establishing etiology for communicable diseases

            A. Koch’s postulates provides a practical framework for establishing etiology

B. Association, isolation, and transmission are the three criteria for Koch’s Modern Postulates

C. Koch’s modern postulates together fulfill the criteria of individual association, the “cause” precedes the “effect” , and altering the “cause” alters the “effect”

D. Koch’s postulates include necessary cause

Answer 1

Correct answer: option d

Rational:

Option a:

  Koch's postulates are four criteria designed to establish a causative relationship between a microbe and a disease. So Koch’s postulates provides a practical framework for establishing etiology. Its most accurate.

Option b:

The microorganism or other pathogen must be present in all cases of the disease. the pathogen can be isolated from the diseased host and grown in pure culture. the pathogen from the pure culture must cause the disease when inoculated into a healthy, susceptible laboratory animal. So its accurate.

Option c:

Koch's postulates were built on a system of formal logic ... level, the “cause” precedes the “ effect” and altering the “cause” alters the effect. So its accurate.

Option d:

Koch’s postulates fails to include the necessary cause. So its least accurate. So option d is correct.