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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.
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. Specifically, PEA agar is a selective medium that is used for the isolation of gram-positive Staphylococcus species and Streptococcus species from clinical specimens or specimens ...
15 maj 2024 · A selective medium called phenylethyl alcohol (PEA), is used to cultivate Gram positive organisms, especially cocci, in a sample containing pathogens. Phenylethyl alcohol is the active ingredient that inhibits or significantly reduces growth of Gram-negative organisms. It interferes with DNA synthesis.
1 lis 2011 · A phenylethyl alcohol (PEA) agar plate inoculated with a mixture of gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. Only growth of the gram-positive bacteria is seen on the PEA agar. When inoculated on tryptic soy agar plates, both bacterial types show growth.
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).
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.
