Spores are disinfected by?
**Core Concept**
Spores are highly resistant forms of bacteria that can survive extreme conditions, making them challenging to disinfect. Effective disinfection of spores requires the use of specialized agents that can penetrate the spore's outer layer and inactivate its contents.
**Why the Correct Answer is Right**
The correct answer is **Ethylene Oxide (EtO)**, which is a potent sporicidal agent. EtO works by diffusing into the spore and covalently binding to the DNA, RNA, and proteins, ultimately leading to the death of the spore. This process is facilitated by the high temperatures and pressures used during the EtO sterilization process.
**Why Each Wrong Option is Incorrect**
**Option A:** Glutaraldehyde is a potent disinfectant, but it is not effective against spores. Glutaraldehyde works by cross-linking proteins and inactivating enzymes, but it is not capable of penetrating the spore's outer layer.
**Option B:** Hydrogen peroxide is a weak sporicidal agent and is not typically used for spore disinfection. While hydrogen peroxide can generate reactive oxygen species that damage cellular components, it is not sufficient to inactivate spores.
**Option C:** Ultraviolet (UV) light is a disinfectant that works by damaging DNA, but it is not effective against spores. Spores have a thick outer layer that protects them from UV light, making them resistant to this form of disinfection.
**Clinical Pearl / High-Yield Fact**
When working with spore-forming bacteria, it's essential to use specialized agents like Ethylene Oxide, which can penetrate the spore's outer layer and inactivate its contents. This is particularly important in the preparation of medical equipment and supplies that require sterilization.
**Correct Answer: C. Ultraviolet (UV) light is a disinfectant that works by damaging DNA, but it is not effective against spores. Spores have a thick outer layer that protects them from UV light, making them resistant to this form of disinfection.