On which type of agar might you expect to see good growth of a gram positive...

On which type of agar might you expect to see good growth of a gram positive bacteria species?

		Blood agar
		MacConkey agar
		Hektoen enteric agar
		All of the above

Expert Solution

Out of the given options, the bacteriological medium that would result in good growth of gram positive bacterial species is Blood agar. This medium is used for the growth of fasidious ( which require complex nutrition for growth) bacteria such as Streptococcus spp. This medium contains red blood cells, which are lysed by the bacteria for nutrition. As Streptococcus is a Gram positive bacterium, this medium can be particularly used for the growth of this bacterium.

Hence, the correct option is (a)

About the incorrect options-

b) MacConkey agar is a selective and differential medium which inhibits the growth of Gram positive bacterium as it contains crystal violet and bile salts for their inhibition. It is suitable for the growth of Gram negatives.

c) Hektoen enteric agar also contains bile salts and dyes for the inhibition of Gram positive bacteria.

d) Only one option is correct.

Hope it helps, Good luck !!!!

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gladiator answered 2 years ago

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