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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.
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.
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).
15 maj 2024 · Principle of Phenylethyl Alcohol Agar. A selective medium, Phenylethyl alcohol (PEA), allows the growth of gram positive cocci and inhibits most gram negative organisms. PEA changes the membrane permeability of Gram-negative bacteria, allowing for the influx of other molecules.
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.
Phenylethyl alcohol agar (PEA) is a selective medium used to cultivate Gram positive organisms. The active ingredient, phenylethyl alcohol, inhibits or markedly reduces growth of Gram negative organisms by interfering with DNA synthesis.
