The theoretical basis of the Kirby-Bauer technique for testing antibiotic sensit

Question

The theoretical basis of the Kirby-Bauer technique for testing antibiotic sensitivity can be used to identify an unknown strain of bacteria: True False Standardized bacterial suspension: The density of the bacterial suspension The dilution factor of the bacterial suspension 0.5 MacFarland Standard b and c A zone of inhibition: A clear area in which there is no bacterial growth due to antibiotic inhibition A clear area in which tested bacteria are sensitive to a particular antibiotic drug A clear area in which tested bacteria grow slowly All of the above The Kirby-Bauer test is always done with Mueller-Hinton agar because of: The way in which antibiotics diffuse through it The way in which it affects the growth of most bacteria Its standardized nutrient medium Only a and b

Explanation / Answer

8) False

Reason: The technique is used only to test the bacterial antibiotic sensitivity.

9) The correct answer is c.0.5 MacFarland Standard

Reason:MacFarland Standard is used as a reference standard so as to adjust the turbidity of bacterial suspension.

10) The correct answer is : a.a clear area in which there is no bacterial growth due to antibiotic inhibition.

Reason:In a zone of inhibition , no bacterial growth occurs.

11)The correct answer is :c.Its standardized nutrient medium.

Reason:Kirby-Bauer describes this media to be a standardised media for antimicrobial testing.

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