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What differences between Ecoli and pseudomonas sp on MacConkey agar?
Wiki User
∙ 13y ago
ecoli is a lactose metabolizer, can live on macconkey while psuedomoas cannot.
Wiki User
∙ 13y ago
On MacConkey agar, a key difference between E. coli and Pseudomonas spp. is their ability to ferment lactose. E. coli ferments lactose, producing pink/red colonies due to acid production. Pseudomonas spp. do not ferment lactose and therefore appear as non-lactose fermenting colonies that are colorless on MacConkey agar.
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Why does the ecoli and pseudomonas are different on the MacConkey agar?
E. coli ferments lactose on MacConkey agar, producing acid that turns the colonies pink due to the pH indicator. Pseudomonas does not ferment lactose, so its colonies remain colorless on MacConkey agar. This difference in lactose fermentation ability is due to variations in their metabolic processes and enzyme production.
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Yes, E. coli can respire using oxygen as a terminal electron acceptor in aerobic conditions. However, it can also use alternative terminal electron acceptors like nitrate or fumarate in anaerobic conditions for respiration.
Why does the ecoli and pseudomonas are different on the MacConkey agar?
E. coli ferments lactose on MacConkey agar, producing acid that turns the colonies pink due to the pH indicator. Pseudomonas does not ferment lactose, so its colonies remain colorless on MacConkey agar. This difference in lactose fermentation ability is due to variations in their metabolic processes and enzyme production.
What is the culture characteristic of Ecoli thst grow on macconkey agar?
E. coli that grow on MacConkey agar typically exhibit lactose fermentation, causing them to produce pink or red colonies. These colonies may also appear mucoid due to the production of a polysaccharide capsule. Additionally, E. coli on MacConkey agar will typically not grow well under acidic conditions, as the agar contains crystal violet which inhibits the growth of Gram-positive bacteria.
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