What are the original color of these agar plates?

Eosine Methylene Blue
Mannitol Salt Agar
Phenylethyl Alcohol Agar
Mueller Hinton Agar

To determine the original color of agar plates, you can refer to the commonly used formulations and ingredients of these agar media.

1. Eosine Methylene Blue Agar (EMB Agar): EMB agar is typically a selective and differential medium used for isolating and differentiating members of the Enterobacteriaceae family. The original color of EMB agar is pale yellow.

2. Mannitol Salt Agar (MSA): MSA is a selective medium used for the isolation and identification of Staphylococcus aureus. The original color of MSA agar is bright red or pink.

3. Phenylethyl Alcohol Agar (PEA Agar): PEA agar is a selective medium used for the isolation of gram-positive bacteria. The original color of PEA agar is light yellow or amber.

4. Mueller Hinton Agar (MHA): MHA is a commonly used medium for the Kirby-Bauer disk diffusion method to determine antibiotic susceptibility. The original color of MHA agar is pale yellow.

Please note that there could be variations in the color of agar plates due to different manufacturers or slight modifications in the formulation. It is always recommended to refer to the manufacturer's guidelines or package insert for the accurate color interpretation.