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1 lis 2011 · Protocol (PDF) Phenylethyl alcohol (PEA) agar allows growth of gram-positive organisms, particularly cocci, while inhibiting most gram-negative bacteria and fungi.
Phenylethyl alcohol agar (PEA) is a selective medium that permits the growth of gram-positive cocci while inhibiting most gram-negative organisms. PEA alters the membrane permeability, of Gram-negative bacteria allowing influx of otherwise blocked molecules.
Typically PEA agar is used to inhibit the common contaminants such as Escherichia coli and Proteus species. PEA agar may be prepared with and without 5% sheep blood supplement. PEA agar with 5% sheep blood is used to isolate most gram-positive and gram-negative anaerobes from enteric samples (7).
Lilley and Brewer developed Phenylethyl Alcohol Agar for isolation of gram-positive cocci, such as staphylococci and streptococci, from specimens containing mixed flora. 1 This medium permits the growth of gram-positive organisms while inhibiting most gram-negative
5 lip 2024 · Phenylethyl alcohol agar (PEA) is a specialized growth medium extensively used in microbiology. Its importance lies in its ability to selectively isolate certain types of bacteria while inhibiting others, which makes it a vital tool for clinical and research laboratories.
Phenylethyl Alcohol Agar is a selective medium used for the isolation of gram-positive organisms such as Staphylococci and Streptococci. Phenylethyl alcohol exert inhibitory bacteriostatic action on gram-negative bacteria by inhibiting their DNA synthesis.
21 paź 2024 · PEA (Phenylethyl alcohol agar) Phenylethyl alcohol agar is a type of “selective” media. When media is selective, it allows some organisms to grow, while others are prevented. In the case of PEA, the alcohol is disruptive to the outer cell membrane of Gram-negative cells and they have a very difficult time growing under the conditions that ...
