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Is EMB agar a defined or undefined medium?
EMB agar is a complex undefined medium because it contains multiple components such as peptone, lactose, agar, and eosin Y and methylene blue dyes that promote the growth of a wide variety of bacteria while inhibiting the growth of certain Gram-positive bacteria.
Macconkey agar is a selective medium and it is also a defined or a undefined medium so why is that a formulation desirable?
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.
EMB is a selective medium Is it also a defined or an undefined medium Why is that formulation desirable?
EMB is an undefined selective/differential medium. It contains aniline dyes (methylene blue and eosin), which inhibit the growth of Gram-positive bacteria selecting for Gram-negative bacteria. EMB also contains lactose which makes the media differential based on an organisms ability to ferment lactose
Why fastidious organism grow poorly in chemically defined medium?
Fastidious organisms have complex nutrient requirements that may not be fully met by a chemically defined medium, which contains a limited set of known nutrients. These organisms may need additional growth factors or specific conditions that are present in more complex, undefined media. The lack of essential nutrients or factors in a chemically defined medium can result in poor growth or failure to grow at all for fastidious organisms.
Does E. faecalis test positive for MSA agar test?
E. faecalis typically does not ferment mannitol, so it does not grow well on mannitol salt agar (MSA) and would not test positive on this medium. MSA is selective for organisms that can ferment mannitol, such as Staphylococcus species.
Is PEA a defined or undefined medium?
Leboffe & Pierce in their text "Microbiology Laboratory Theory and Application" (second edition) state on page 111 that PEA is an undefined medium
Is macConkey agar defined or undefined?
Undefined.
Why are undefined terms called undefined?
A term that is undefined mean simply that it is not defined. The prefix un means not, and if you add it to the word defined, ta da, you get undefined.
How are undefined terms and defined terms relate to each other?
"Defined items" are defined in terms of "undefined terms".
Why is undefined terms in geometric is called undefined?
they are not defined
Why is set an undefined term?
A set can be defined or undefined.
Is EMB agar a defined or undefined medium?
EMB agar is a complex undefined medium because it contains multiple components such as peptone, lactose, agar, and eosin Y and methylene blue dyes that promote the growth of a wide variety of bacteria while inhibiting the growth of certain Gram-positive bacteria.
How are defined terms and undefined terms relate to each other?
"Defined items" are defined in terms of "undefined terms".
Is zero undefined?
Zero is pretty well defined. Division by zero is undefined.
What is the difference between defined and undefined culture media?
There are two main classifications of culture medianamely defined and undefined. An undefined culture mediumcontains a basic source of aminoacids and nitrogen which are the essential requirements for growth of microorganisms. Common examples of the constituents are beef and yeast extracts. The exact composition and percentage of the individual amino acid or nitrogen providing source is unknown and this is used for basic culture and maintenance of strains. An undefined medium is also called a basal or complex medium. In addition to the aminoacid and nitrogen source it also contains a source for glucose, water and other essential salts.A defined culture medium or synthetic medium is one that contains salts and a glucose source and other components based on the requirements of culture. It contains no yeast or animal extracts. Each of the components used are accurately weighed and the percentage known.
Macconkey agar is a selective medium and it is also a defined or a undefined medium so why is that a formulation desirable?
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.
What is zero times undefined?
logically, if any number divided by 0 is undefined, than according to reverse operation, undefined times zero should be any number which would make it undefined. 0/1 x 1/0 = 0/0 which is undefined Also, "undefined" means it's undefined. If one of the factors is not defined, then you can't very well expect the product to be defined; now can you !
