Question

Which of the following is used to evaluate disinfectant?

• A. $ \text{Widal test} $
• B. $ \text{VRDL test} $
• C. $ \text{Chick Martin test} $
• D. $ \text{None of these} $

Hint:

Remember: Chick Martin test evaluates disinfectants under real-use conditions; Widal test is for typhoid.

Answer 1

The Correct Option is C

The Chick Martin test is a classical method used to evaluate the efficacy of disinfectants in the presence of organic matter (e.g., yeast, proteins).

It improves upon the Rideal–Walker test by simulating more realistic conditions found in clinical and environmental settings.
This test involves the comparison of phenol coefficient of a disinfectant in the presence of organic load.

Widal test — Used for serological diagnosis of typhoid fever, not for disinfectants.

VRDL test — Refers to Viral Research and Diagnostic Laboratory tests for viral infections like HIV, hepatitis, etc.

Hence, both (A) and (B) are unrelated to disinfectant evaluation.