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Q: Why staph aureus grows on macconkey agar?
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What type of medium is macconkey agar?

types macconkey agar


Does micrococcus luteus grow on macconkey agar?

MacConkey agar is designed to grow Gram-negative bacteria and also contains crystal violet dye which inhibits the growth of Gram-positive bacteria. Since S. aureus is Gram-positive it should not grow on MacConkey agar. No. MacConkey agar inhibits MOST of the Gram-positive bacteria. There are some Gram-positive bacteria that can tolerate bile-salt are able to grow in MacConkey agar. Enterococcus and some species of Staphylococcus are able to grow in MacConkey. (lack citation though)


Does Staphylococcus grow on non crystal violet MacConkey agar?

Staphylococcus will not grow on Mac since crystal violet inhibits the growth of Gram positivesfmchinea: Actually some species of staphylococcus grow on MacConkey's plate including Staphylococcus aureus.


What selective agent found in Mannitol Salt Agar?

The high salt concentration (7.5-10% w/v) makes the agar hard for all but staph spp. To grow, and staph aureus turns yellow when it ferments the mannitol.


Is macConkey agar defined or undefined?

Undefined.


What is a Mac plate?

MacConkey Agar plate


Is macconkey agar a synthetic media?

yes


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.


What agar is the best for staphylococcus aureus?

Mannitol salt agar is one of the best agar fro isolation of Staphylococcus aureus


How does yersinia look on nutrient agar EMB agar and MacConkey agar?

Colorless, it doesnt ferment lactose.