Irradiation can be used to sterilize all, EXCEPT:
**Core Concept**
Irradiation is a method of sterilization that involves exposing materials or objects to ionizing radiation, such as gamma rays or X-rays, to kill or inactivate microorganisms. This process is commonly used in medical devices, pharmaceuticals, and food products to eliminate bacterial, viral, and fungal contaminants.
**Why the Correct Answer is Right**
Irradiation works by damaging the DNA of microorganisms, thereby preventing them from reproducing. The radiation energy disrupts the double helix structure of DNA, leading to mutations, chromosomal breaks, and ultimately, cell death. This process is effective against a wide range of microorganisms, including bacteria, viruses, and fungi.
**Why Each Wrong Option is Incorrect**
**Option A:**
Irradiation is indeed used to sterilize medical devices, such as syringes, surgical instruments, and implants.
**Option B:**
Irradiation is commonly used to sterilize pharmaceutical products, including vaccines, antibiotics, and other medications.
**Option C:**
This option is incorrect. While irradiation can be used to extend the shelf life of food products by killing bacteria and other microorganisms, it is not as effective for sterilizing heat-sensitive foods, such as fruits and vegetables.
**Clinical Pearl / High-Yield Fact**
Irradiation is a valuable tool for sterilization, but it is not without limitations. It is essential to consider the type of material being sterilized, the level of radiation required, and the potential effects on the material's structure and function.
**Correct Answer: D.**