- Why EMB has both selective and differential properties?
- Why is mannitol salt agar used as a selective medium?
- Why blood agar is selective media?
- What inhibits G+ from growing in MacConkey?
- What is MacConkey agar selective for quizlet?
- Is MacConkey agar selective or differential quizlet?
- What selects for growth on MacConkey Agar?
Why EMB has both selective and differential properties?
Eosin Methylene Blue (EMB) agar is both a selective and differential culture medium. It selectively promotes the growth of Gram-negative bacteria (inhibits Gram-positive bacteria) and aids in the differentiation of lactose fermenter and non-lactose fermenting colonies.
Why is mannitol salt agar used as a selective medium?
Mannitol salt agar (MSA) is both a selective and differential medium for culturing staphylococci which was originally described by Chapman (1945). The medium is selective because the presence of a high salt concentration (7·5%) suppresses the growth of most bacteria.
Why blood agar is selective media?
A selective media is composed of specific ingredients to inhibit the growth of certain species of microbes in a mixed culture while allowing others to grow. Blood agar is a differential medium that distinguishes bacterial species by their ability to break down red blood cells.
What inhibits G+ from growing in MacConkey?
What inhibits G+ from growing In EMB? MacConkey contains bile salts which are similar to the bile salts that come out of our gallbladder that digest fats we eat. Bile salts are detrimental to Gram + bacteria, therefore MAC will kill off any G+ bacteria that is streaked onto the MAC plate.
What is MacConkey agar selective for quizlet?
MacConkey Agar = selective for gram negative organisms and contain indicators to differentiate lactose fermenters from lactose nonfermenters.
Is MacConkey agar selective or differential quizlet?
MacConkey agar is selective for gram-negative organisms and contain indicators to differentiate what? Is MAC a selective or differential media? Both because it selectively allows only gram-negative bacteria to grow while differentiating which can ferment lactose. You just studied 8 terms!
What selects for growth on MacConkey Agar?
MacConkey agar is a selective and differential culture medium for bacteria. The media inhibits growth of Gram-positive organisms with crystal violet and bile salts, allowing for the selection and isolation of gram-negative bacteria.