Reidel walker test measures efficacy of disinfection by using?
**Core Concept**
The Riedel-Walker test is a method used to evaluate the effectiveness of disinfection procedures, specifically in the context of sterilizing medical equipment. This test relies on the principle of using a bacterial suspension to assess the efficacy of a disinfectant.
**Why the Correct Answer is Right**
The Riedel-Walker test measures the efficacy of disinfection by using a bacterial suspension of **Staphylococcus aureus** or **Escherichia coli**. The test involves inoculating a surface with the bacterial suspension, allowing it to dry, and then applying the disinfectant. The surface is then cultured to determine the number of viable bacteria remaining. This method provides a quantitative measure of the disinfectant's effectiveness in reducing bacterial load.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the Riedel-Walker test does not use a viral suspension to evaluate disinfection efficacy.
* **Option B:** This option is incorrect because the test does not rely on a fungal suspension to assess disinfectant effectiveness.
* **Option C:** This option is incorrect because the test does not use a protozoan suspension to evaluate disinfection efficacy.
**Clinical Pearl / High-Yield Fact**
The Riedel-Walker test is a useful method for evaluating the effectiveness of disinfection procedures, but it is essential to note that it may not be suitable for all types of disinfectants or surfaces. In such cases, alternative methods like the **Membrane Filtration Method** or the **ATP Bioluminescence Method** may be used.
**Correct Answer: C. Escherichia coli**