Koch's Postulates Quiz

What are Koch's Postulates?

• Criteria to identify the causative agent of a disease

• Methods to prevent infectious diseases

• Techniques to isolate microorganisms from the environment

• Ways to treat laboratory animals

Which of the following is NOT one of Koch's Postulates?

• The pathogen must be reisolated from the new host and shown to be the same as the originally inoculated pathogen

• The pathogen can be isolated from the diseased host and grown in pure culture

• The pathogen must cause the disease when inoculated into a healthy, susceptible laboratory animal

• The pathogen must be present in all cases of the disease

What is the second criteria of Koch's Postulates?

• The pathogen must be reisolated from the new host and shown to be the same as the originally inoculated pathogen

• The pathogen can be isolated from the diseased host and grown in pure culture

• The pathogen must cause the disease when inoculated into a healthy, susceptible laboratory animal

• The pathogen must be present in all cases of the disease

Which of the following is required for a pathogen to fulfill Koch's Postulates?

• The pathogen must be reisolated from the new host and shown to be different from the originally inoculated pathogen

• The pathogen can only be isolated from the diseased host and not from the environment

• The pathogen must cause a different disease when inoculated into a healthy, susceptible laboratory animal

• The pathogen must be present in some cases of the disease

Who established Koch's Postulates?

• Robert Koch

• Louis Pasteur

• Alexander Fleming

• Edward Jenner