The following are Koch’s Postulates, in random order. Which is the correct order? (1) The suspected organism is grown in pure culture (2) Cells from a pure culture of the suspected organism should cause disease in a healthy animal (3) The organism is re-isolated and shown to be the same as the original (4) The suspected pathogen should be present in all cases of the disease and absent from healthy animals.
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A: The correct order of Koch's Postulates is: Show more…
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Place the following steps in the correct order, according to Koch's postulates: I. Determine if pure cultures of bacteria cause disease symptoms when introduced to a healthy host. II. Determine if disease symptoms correlate with presence of a suspected pathogen. III. Isolate the suspected pathogen and grow it in pure culture, free of other possible pathogens. IV. Attempt to isolate pathogen from second-infected hosts. a. II, III, IV, I b. II, IV, III, I c. III, II, I, IV d. $\mathrm{II}, \mathrm{III}, \mathrm{I}, \mathrm{IV}$ e. I, II, III, IV
Place the following steps in the correct order, according to Koch's postulates: I. Determine if pure cultures of bacteria cause disease symptoms when introduced to a healthy host. II. Determine if disease symptoms correlate with presence of a suspected pathogen. III. Isolate the suspected pathogen and grow it in pure culture, free of other possible pathogens. IV. Attempt to isolate pathogen from second-infected hosts. a. II, III, IV, I b. II, IV, III, I c. III, II, I, IV d. II, III, I, IV e. I, II, III, IV
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These are the major tenets of Koch's postulates: a. The pathogen must be isolated from the inoculated animal and must be shown to be the original organism. b. The pathogen must be isolated from the diseased host and grown in pure culture. c. The same pathogen must be present in every case of the disease. d. The pathogen from the pure culture must cause the disease when injected into a healthy susceptible laboratory animal. What is the exact order/sequence of these components of Koch's postulates? a-b-c-d c-c-d-a c-b-a-d d-c-b-a
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