Medium for growth of anaerobic bacteria?
**Core Concept**
Anaerobic bacteria are microorganisms that thrive in environments lacking oxygen. They have unique metabolic pathways to generate energy in the absence of oxygen.
**Why the Correct Answer is Right**
The correct answer is a medium that supports the growth of anaerobic bacteria by providing a low-oxygen environment or excluding oxygen altogether. Anaerobic bacteria such as Clostridium and Bacteroides require a medium that is either devoid of oxygen or contains reducing agents to maintain a low redox potential. This allows them to carry out anaerobic respiration, producing ATP through the breakdown of organic molecules.
**Why Each Wrong Option is Incorrect**
**Option A:** Thioglycollate medium is often used for anaerobic culture, but it is not the most specific or commonly used medium for anaerobic bacteria growth.
**Option B:** Sabouraud dextrose agar is a medium used for fungal cultures and not suitable for anaerobic bacteria.
**Option C:** Blood agar is a general-purpose medium that can support the growth of various bacteria, including some anaerobes, but it is not specifically designed for anaerobic bacteria.
**Clinical Pearl / High-Yield Fact**
When culturing anaerobic bacteria, it is essential to use a medium that excludes oxygen, such as thioglycollate medium or a gas-pak system, to prevent the growth of aerobic contaminants.
**Correct Answer: D. Robertson's cooked meat medium.**