Tyndallisation is carried out for:
**Core Concept**
Tyndallisation is a method used to sterilize and remove spores from a substance, particularly in the context of microbiology and food safety. This process involves heating the substance to a temperature that is lethal to vegetative bacteria and fungi, but not to bacterial spores, followed by a period of cooling and then a repeat of the heating and cooling cycle.
**Why the Correct Answer is Right**
The correct answer is related to the fact that Tyndallisation is a process specifically designed to target and eliminate bacterial spores. Bacterial spores are highly resistant to heat and can survive temperatures that would be lethal to vegetative bacteria. By subjecting the substance to multiple cycles of heating and cooling, the vegetative bacteria are killed, while the spores are not immediately affected. However, the repeated heating and cooling process eventually leads to the death of the bacterial spores as well. This process is particularly useful in laboratory settings and in the preparation of pharmaceuticals.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the context of Tyndallisation, which is specifically related to the removal of bacterial spores.
**Option B:** This option is incorrect as Tyndallisation is not a method used to detect antigens or antibodies.
**Option C:** This option is not accurate as Tyndallisation is not a method used for the preparation of vaccines.
**Clinical Pearl / High-Yield Fact**
Tyndallisation is an essential step in the preparation of certain medications and laboratory reagents to ensure their sterility and safety for use.
**Correct Answer:** C.