Test your knowledge! which of the following (you can pick more than one) are part of the koch's postulates? 1. the hmpv infection is identified in gorillas infected with this pathogen. 2. the disease has been found in nature before. 3. the microorganism must be isolated from a diseased organism and grown in pure culture. 4. the organism, isolated from gorillas with hmpv, and when cultured will produce the disease when administered to experimental animals. all of the above.

 1. The HMPV infection is identified in gorillas infected with this pathogen.

3. The microorganism must be isolated from a diseased organism and grown in pure culture.

4. The organism, isolated from gorillas with HMPV, and when cultured will produce the disease when administered to experimental animals.

Explanation:

Robert Koch proposed four postulates to identify the fact that the causative agent or microorganisms is responsible for the particular disease. The pathogen can be isolated from the diseased or infected host and grown into the pure culture then again the pure culture is infected into a healthy host and symptoms of disease can be identified to prove that the infectious agent is responsible for the disease.

The following statements are the part of the Koch's postulates.

1. The HMPV infection is identified in gorillas infected with this pathogen.: This is the conclusion part of the postulates of Koch according to which the infection causing agent is identified which was responsible for disease.

3. The microorganism must be isolated from a diseased organism and grown in pure culture.: The microoganism is isolated and grown in the culture from the diseased organism so as to determine whether it is responsible for the disease or not.

4. The organism, isolated from gorillas with HMPV, and when cultured will produce the disease when administered to experimental animals.: According to the Koch postulate the microorganism grown in pure culture should be introduced to the healthy organism if it develops the symptoms then it is the causative organism for the disease.  

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