Question

Which of the following tests estimate the antimicrobial action by using phenol as disinfectants?
(A)Rideal walker method
(B)Serial dilution method
(C)Agar plate method
(D)None of the above

Answer 1

Disinfectants utilized in emergency clinics and research facilities must be tried occasionally to find out its intensity and adequacy. As specific disinfectants lose intensity on standing and expansion of natural matter, their viability must be tried. While certain strategies help in choosing the correct weakening of disinfectant for use by others to test the adequacy of disinfectant as of now being used.

Complete answer:
Rideal walker test is utilized to test disinfectants. Bactericidal power is evaluated by the pace of microbes slaughtered under indicated conditions. Sequential weakening and agar plate strategy are utilized to grow a bacterial culture.

Additional information:
The Rideal–Walker coefficient, presently just of recorded interest, is a figure communicating the cleaning intensity of any disinfectant. It is the proportion of the weakening of the disinfectant that kills a microorganism to the weakening of phenol that kills the living being in a similar time under indistinguishable conditions. The Rideal–Walker coefficient decides the phenol coefficient using the strategy (test) depicted by English physicists Samuel Rideal (1863–1929) and J. T. Ainslie Walker (1868–1930). The self-assertive decision of contact time (sanitization in 7.5 minutes), diluent (refined water), and test living being (Salmonella typhi, at that point called Bacillus typhosa) didn't mirror the conditions under which disinfectants were utilized. Along these lines, outlandishly high qualities were acquired for disinfectant action and cited by disinfectant makers. The technique was alluded to by recognized microbiologist Sir Ashley Miles as "...at best a horribly misrepresented response to a troublesome issue, and even under the least favorable conditions minimal shy of bacteriological prostitution".

So, the correct answer is the 'Rideal walker method'.

Note: A few techniques think about the exhibition with that of phenol while different strategies basically state if the disinfectant is powerful or not. There are a few techniques for testing disinfectants, with their own favorable circumstances and weaknesses. Every one of these tests can be distributed to one of the accompanying disinfectant tests: transporter test, suspension test, limit test, pragmatic test, field test, or being used test.