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Why does the ecoli and pseudomonas are different on the MacConkey agar?
Wiki User
∙ 11y ago
MacConkey's agar is a differential media used to differentiate between lactose fermenting and lactose non-fermenting bacteria. E.coli is a lactose fermenter whereas Pseudomonas is a lactose non-fermenter.
MacConkey's agar contains lactose as fermentable sugar and when it is fermented the pH of the medium decreases which is registered by neutral red (a pH indicator).
Lactose fermenters such as E.coli produce pink colonies whereas lactose non-fermenters such as Pseudomonas produces colorless colonies. So the colors of E.coli and Pseudomonas colonies are different on MacConkey's agar.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoMacConkey's agar is a differential media used to differentiate between lactose fermenting and lactose non-fermenting bacteria. Both E.coli and Pseudomonas spp are gram negative organisms, but E.coli is a lactose fermenters whereas Pseudomonas is a lactose non-fermenter. MacConkey's agar contains lactose as fermentable sugar and when it is fermented the pH of the medium decreases which is registered by neutral red (a pH indicator). Lactose fermenters (E.coli) produce pink colonies whereas lactose non-fermenters (Pseudomonas) produces colourless colonies. hence the colours of E.coli and Pseudomonas colonies are different on MacConkey's agar.
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What differences between Ecoli and pseudomonas sp on MacConkey agar?
ecoli is a lactose metabolizer, can live on macconkey while psuedomoas cannot.
What is a Mac plate?
MacConkey Agar plate
Is macconkey agar a synthetic media?
yes
Why MacConkey agar is solid at room temperature while MacConkey broth remains Liquid at room Temperature?
MacConkey agar is solid at room temperature because it is a gel-like polysaccharide. Broth that has 1.5 percent agar in it and is heated up will become a liquid.
Will Alcaligenes faecalis grow on MacConkey agar?
yes
What differences between Ecoli and pseudomonas sp on MacConkey agar?
ecoli is a lactose metabolizer, can live on macconkey while psuedomoas cannot.
What is the culture characteristic of Ecoli thst grow on macconkey agar?
E.coli shows pink colour colonies in MacConkey agar due to fermentation of lactose
How can you differentiate the pigment of p aeruginosa on pseudomonas agar P from the pigment of E coli on MacConkey agar without referring to the colors?
It's not easy to differentiate the pigment of p aeruginosa on pseudomonas agar P from the pigment of E. coli on MacConkey agar without referring to the colors, but it can be done based on the structure of the p aeruginosa.
Can Pseudomonas fluorescens grow on MacConkey agar?
Yes. But because it is not a lactose fermenter, the colonies will be colorless (or sometimes have a green tint).
What type of medium is macconkey agar?
types macconkey agar
What is a Mac plate?
MacConkey Agar plate
Is macconkey agar a synthetic media?
yes
Is macConkey agar defined or undefined?
Undefined.
How do you grow Klebsiella pneumoniae?
MacConkey agar
Why MacConkey agar is solid at room temperature while MacConkey broth remains Liquid at room Temperature?
MacConkey agar is solid at room temperature because it is a gel-like polysaccharide. Broth that has 1.5 percent agar in it and is heated up will become a liquid.
What is the name of the acide base color indicator found in MacConkey agar?
Lac+ bacteria is acid base color indicator that lowers the pH of the MacConkey agar. The MacConkey agar contains neutral red dye, lactose, peptone, and crystal violet dye.
How does yersinia look on nutrient agar EMB agar and MacConkey agar?
Colorless, it doesnt ferment lactose.
