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MacConkey agar is a selective medium designed to grow Gram negavite bacteria and stain them for lactose fermentation. It contains bile salts[to inhibit most Gram negative bacteria and some species of Staphlococcus], crystal violet dye, neutral red dye ,lactose and peptone. It was first developed by Alfred Theodore MacConkey. It is used to distinguish between lactose fermenting bacteria and non lactose fermenting bacteria. By utilising the lactose available in the medium, Lac+ bacteria such as Escherichia coli, Enterobacter and Klebsiella will produce acid, which lowers the pH of the agar below 6.8 and results in the appearance of red/pink colonies. Non-Lactose fermenting bacteria such as Salmonella, Proteus species and Shigella cannot utilize lactose, and will use peptone instead. This forms ammonia, which raises the pH of the agar, and leads to the formation of white/colorless colonies
What else can I help you with?
How many teaspoons is 7 g agar agar powder?
Approximately 2 teaspoons of agar agar powder is equivalent to 7 grams.
From which organism agar agar is extracted?
red algae Agar agar is a malay term meaning red algae. This algae which agar is extracted lives in the ocean around Malaysia
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)
Is there a microorganism that degrades Agar agar?
Yes, some marine bacteria and fungi have been identified to possess the capability to degrade agar agar. These microorganisms secrete enzymes such as agarases that breakdown agar into simpler sugars, which they can then use as a source of energy.
Which group of algae produce agar agar?
Agar comes from Red Algae (primarily the Gracilaria genus).It mainly is produed from the red algae Gracilaria lichenoides.This algae is harvested along the western coast of the United States and in parts of Asia. To extract the agar the Algae is boiled, cooled, purified and then dried. The agar is then make into blocks, flakes, or granules.("Agar agar" is usually abbreviated as "agar".)
What is the birth name of Phil McConkey?
Phil McConkey's birth name is Philip Joseph McConkey.
What actors and actresses appeared in McConkey - 2013?
The cast of McConkey - 2013 includes: Bob Burnquist as himself Miles Daisher as himself Kent Kreitler Kent Kreitley Glenn McConkey Sherry McConkey Glenn McConkey as herself Sherry McConkey as herself Shane McConkey as himself Jonny Moseley as himself Travis Pastrana as himself Scot Schmidt
When was Tony McConkey born?
Tony McConkey was born in 1963.
When was Bob McConkey born?
Bob McConkey was born in 1895.
When was Mary McConkey born?
Mary McConkey was born in 1916.
When was Thomas David McConkey born?
Thomas David McConkey was born in 1815.
When did Thomas David McConkey die?
Thomas David McConkey died in 1890.
When was Shane McConkey born?
Shane McConkey was born on 1969-12-30.
When did Shane McConkey die?
Shane McConkey died on 2009-03-26.
What is Mcconkey agar media?
It's a differential agar used to differentiate between lactose fermenters and non-lactose fermenteing bacteria. Chemical composition of Mac Conkey agar Peptone 20.0g Trehalose 10.0g Bile salts(Difco) 1.5g Sodium Cloride 5.0 Neutral Red 0.05g Crystal Violet 0.001 Agar 15.0g Distelled water 1.0 liter pH: 7.4±0.2 (25 °C)
Why won't campylobacter jejuni grow on macconkey agar?
Campylobacter jejuni will not grow on MacConkey agar because it is a selective and differential medium designed to support the growth of Gram-negative enteric bacteria while inhibiting the growth of Gram-positive bacteria. Campylobacter jejuni is a Gram-negative bacterium, but it is not an enteric bacterium, so it lacks the specific enzymes needed to utilize the nutrients in MacConkey agar for growth.
How tall is Phil McConkey?
Phil McConkey is 5' 10".
