Koch stressed the importance of working with ______ to formulate his postulates of disease.

• A. Anaerobic culture.
• B. Enriched culture.
• C. Pure culture.
• D. Mixed culture.
• E. Abstract culture.

Answer: (C)

Verified step by step guidance

1. Understand the concept of Koch's postulates: These are a set of criteria established by Robert Koch to identify the causative agent of a particular disease.
2. Recognize the significance of pure cultures in microbiology: A pure culture contains only one type of microorganism, which is crucial for accurately identifying and studying the pathogen responsible for a disease.
3. Consider why pure cultures are essential for Koch's postulates: To fulfill Koch's postulates, it is necessary to isolate the microorganism in a pure culture to ensure that the observed effects are due to a single pathogen.
4. Evaluate the options provided: Anaerobic culture, enriched culture, mixed culture, and abstract culture. Determine which option aligns with the requirement for isolating a single type of microorganism.
5. Conclude that pure culture is the correct answer: Pure cultures allow for the precise identification and study of the pathogen, which is fundamental to applying Koch's postulates effectively.