Koch's postulates used to establish a causative link between a specific microbe and a specific disease include :
1. Microbe should be present in individuals suffering from disease and absent from healthy peoples.
2. If organisms from pure culture are injected into a healthy experimental organism, the disease symptoms must appear.
3. The microbe should be isolated and grown in pure culture.
A disease is a selected bizarre condition that negatively influences the structure or feature of all or a part of an organism, and that isn't right now because of any external injury.
Symptoms of illness are regularly not at once the end result of contamination, but a set of advanced responses – sickness behavior with the aid of the body – that helps clear infection and sell healing.
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