this MacConkey with crystal violet can grow enterococcus
Because they are hardy
From what I've found... Lactococcus lactis won't grow on a 6.5% plate while enterococcus faecalis will. Hope that helps!
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)
E.coli shows pink colour colonies in MacConkey agar due to fermentation of lactose
This type of agar is designed to grow gram-negative bacteria. It will not grow gram-positive bacteria due to a dye in the formula of the agar.
Yes. But because it is not a lactose fermenter, the colonies will be colorless (or sometimes have a green tint).
yes
From what I've found... Lactococcus lactis won't grow on a 6.5% plate while enterococcus faecalis will. Hope that helps!
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)
MacConkey agar
The organism would be expected to grow better in nutrient agar. Nutrient agar is rich in nutrients and microorganisms grow well when there is availability of nutrients.
E.coli shows pink colour colonies in MacConkey agar due to fermentation of lactose
campylobacter can growth in mcconkey agar.
MacConkey's agar refers to a culture medium that is designed to selectively grow Gram-negative bacteria. It contains crystal violet dye, which inhibits certain Gram-positive bacteria.
This type of agar is designed to grow gram-negative bacteria. It will not grow gram-positive bacteria due to a dye in the formula of the 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.
Yes. But because it is not a lactose fermenter, the colonies will be colorless (or sometimes have a green tint).
Gram + bacteria do NOT grow on EMB agar, EMB agar inhibits their growth, and is selective for Gram -