Which statement about Robert Koch’s germ theory of disease is incorrect?

1. A Option A: The organism can be isolated and grown in pure culture in the laboratories
2. B Option B: It is possible to recover the organism in pure culture from the experimentally infected animals
3. C Option C: The pure culture cannot produce the disease when inoculated into a susceptible animal, although the causative organism isolated from the pure culture can
4. D Option D: A specific organism can always be found in association with a given disease

Answer checked 11 October 2026 · How we write and check questions