Malt Extract Agar Plates/W Penicillin G
Catalog.No:DCP-MEAPPG
Features:
Uses: clinical, food safety, fungal taxonomy and classification
pH: 5.0–5.2
Size: 100 mm
Concentration: 50 µg/mL
Storage: Keep away from light at 2–8°C
Shipping Condition: Blue ice
Appearance: light amber to amber-colored appearance with a slightly opalescent clarity
Sterile
Shelf Life: 2 Weeks
*All agar plates are manufactured with ultrapure water, deionized and demineralized to minimize ionic and organic contaminants. The premium ISO certified agar solution is sterilized by a full cycle of autoclaving. Each 100mm plate has 20mL of agar medium in premium plastic dish.
Description:
Malt Extract Agar (MEA) plates with Penicillin G are selective fungal plates in which the standard MEA formulation is supplemented with β-lactam antibiotic (penicillin G) to inhibit bacteria while allowing yeasts and molds to grow on a nutrient-rich, mildly acidic surface. MEA uses malt extract as the primary carbon and energy source, typically around 20–30 g/L, providing maltose, glucose, dextrins, vitamins, and growth factors that strongly support fungal metabolism and sporulation. A small amount of peptone or mycological peptone (often 1–5 g/L in many MEA formulations) supplies amino acids and other nitrogenous compounds, giving luxuriant fungal growth with typical colony morphology and pigmentation.
Penicillin G is a β-lactam antibiotic that binds to bacterial penicillin-binding proteins (PBPs), which include transpeptidases responsible for cross-linking peptidoglycan strands in the cell wall. By inactivating PBPs, Penicillin G blocks peptidoglycan cross-linking, weakens the bacterial cell wall, and leads to osmotic lysis and bacterial death, especially in actively growing gram-positive organisms. Fungal cells lack peptidoglycan cell walls, so at typical microbiological plate concentrations penicillin G selectively targets bacteria and leaves yeasts and molds largely unaffected.
The acidic pH and fungal nutrients (malt extract plus peptone) already biases growth toward yeasts and molds, reducing the competition of many bacteria relative to fungi. The addition of Penicillin G to MEA further suppresses susceptible gram-positive bacteria and some gram-negative bacteria.
* This product is manufactured under ISO 13485-certified and CE-approved facilities (Suppliers of DiagnoCine Precision). All final packaging, quality assurance, and testing are done at the DiagnoCine R&D and Quality Testing Center. All specific customization requests and assembly were accomplished at DiagnoCine Precision in Totowa, New Jersey, USA
