Microbiology Which of the following is not a Koch’s postulate? A The bacteria should be able to be isolated from a diseased tissue B When inoculated in experimental animals, bacteria may or may not cause disease C Pure cultures can be obtained D Bacteria should be able to be isolated from the diseased tissue in the experimental animals 💡 Explanation Which of the following is not a Koch's postulate? ✓ Correct Answer: B. When inoculated in experimental animals, bacteria may or may not cause disease