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Why cant you use the same selective and differential media for staphylococci and streptococci?
Wiki User
∙ 13y ago
Staphylococci and Streptococci grow in different locations under different conditions. Staphylococci are found on skin surfaces and nasal path whereas Sptreptococci are found in the intestinal and urinary tract. Thus, due to difference in the growth conditions and biochemical processes, we need to use different selective and differential media for them.
Binod,Toronto, Canada
Wiki User
∙ 13y ago
Selective and differential media are designed to support the growth of specific types of bacteria while inhibiting the growth of others. Staphylococci and streptococci have different nutritional and metabolic requirements, so a single selective and differential media may not provide the necessary conditions for both types of bacteria. Each type of bacteria may require specific nutrients, pH levels, or antimicrobial agents for optimal growth and differentiation, which cannot be provided by a single media formulation.
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Is Differential media a type of culture media?
what do you mean? I would say yes. The main types of culture media are Enriched media Differential media Selective media Characterisation media.
Why blood agar medium producing less contamination?
as it is a selective media for streptococci it inhibits the growth of other bacteria.
Does s. epidermidis grow on msa?
Streptococcus cannot grow on MSA plates because MSA is a selective and differential media. It is selective because only certain microorganisms can grow on it due to its high NaCl content, in which this concentration - near 10% in MSA - has an inhibitory effect on most bacteria, such as Streptococci.
What is enrichment medium and how does it differ from differential and selective media?
Selective media is one that grows only certain microorganisms while inhibiting (or preventing) others from growing, that is to say , the media has certain chemicals that allow one organism to grow but another organism cannot grow with those ingredients in the media, thus, is selective for the organisms that can grow in that media. Therefore, most commonly grows only one type of organism. Differential media is one that distinguishes one microorganism from another, it can grow more than one microorganism, but depending on how each organism reacts to the media (like turns red) it differentiates from another microorganism. In this type of media if you are trying to distinguish between 2 types of microorganisms, both should grow but they will have different reactions to the media, and thru their visible reactions you can tell them apart (differentiate them).
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
Is a tsa agar selective or differential?
its a selective media
Is the media for oxidase test selective or differential?
media used for oxidase test is non selective media
Is tryptone broth differential or selective media?
differential.
Why is Msa argar a selective medium?
Mannitol Salt Agar is selective for staphylococci as the high salt (sodium chloride) levels prohibit most other bacteria from surviving and it is differential as Staphylococci ferment mannitol, producing acid, lowering the pH and turning the media yellow. The development of yellow media presumes the bacteria to be pathogenic Staphylococcus (usually S. aureus). From A Photographic Atlas for the Microbiology Laboratory by Leboffe and Pierce.
What is the principle of selective media?
Scientists in a lab use selective media and differential media to identify or isolate organisms. Selective media allows only certain types of organisms to grow.
Is Differential media a type of culture media?
what do you mean? I would say yes. The main types of culture media are Enriched media Differential media Selective media Characterisation media.
Why blood agar medium producing less contamination?
as it is a selective media for streptococci it inhibits the growth of other bacteria.
Does s. epidermidis grow on msa?
Streptococcus cannot grow on MSA plates because MSA is a selective and differential media. It is selective because only certain microorganisms can grow on it due to its high NaCl content, in which this concentration - near 10% in MSA - has an inhibitory effect on most bacteria, such as Streptococci.
Compare simple media with differential media?
Differential media or selective media is an agar that has certain nutrient to grow certain microbes. Simple media is an agar that has simple sugars that many normal microbes thrive in.
Why can mannitol salt agar and EMB agar be described as both selective and differential media?
it is selective because only a salt tolerant can grow. 7.5 nacl it has diffrential properties also. if mannitol formentors turns yellow staphlococus aureus; but if it has no change then its a nonpathogenic staphlococci (s. edermis)
What is blood agar tellurite medium?
It is a SELECTIVE DIFFERENTIAL media used for the groth of Corynebacterium diphtheria.
Why is mannitol salt considered to be a differential media?
Mannitol salt agar is used for the isolation of staphylococci which is found normally on skin (S. aureus). The selectivity is obtained by the high salt concentration that inhibits growth of many groups of bacteria.
