Microbiology - Antimicrobial Chemotherapeutic Agents - Discussion

Discussion :: Antimicrobial Chemotherapeutic Agents - Section 1 (Q.No.13)


When using alcohol as an antiseptic, which concentration is considered most effective?

[A]. 95%
[B]. 50%
[C]. 70%
[D]. 25%

Answer: Option C


No answer description available for this question.

Nishi Sharma said: (Sep 23, 2019)  
Why this concentration is considered to be more effective? Because in mostly laboratory uses, we use 95% alcohol solution for surface sterilization.

Otimeyin said: (Feb 18, 2020)  
In near absolute alcohol, the peptides that make up the cell wall coagulate and this eventually creates a barrier against the alcohol. In 70% alcohol, this effect is slowed and due to the dilution from the distilled water; allowing the alcohol to penetrate into the cell and kill the microorganism.

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