Potato Dextrose Agar Plates/W Streptomycin Sulfate
Catalog.No:DCP-PDAPSS
Uses: Detection of fungi or bacteria in food, dairy, cosmetic, and environmental samples
pH: 5.6 ± 0.2
Size: 100 mm
Storage: Keep away from light at 4°C
Concentration:100 µg/mL
Shipping Condition: Blue ice
Appearance: yellow clear to slightly opalescent
Sterile
Shelf life: 4 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:
Potato Dextrose Agar (PDA) plates with streptomycin sulfate are a selective fungal medium formulated to support robust growth of yeasts and molds while inhibiting many co-present bacteria by adding an aminoglycoside antibiotic to a fungally favorable base. PDA contains potato infusion/extract, dextrose, and agar, yielding a carbohydrate-rich, slightly acidic medium that promotes luxuriant mycelial growth, sporulation, and pigment production in a broad range of environmental, food, and cosmetic yeasts and molds. The potato infusion provides complex nutrients and growth factors, dextrose supplies an easily metabolized carbon source, and agar forms a firm, clear gel suitable for colony isolation and morphology assessment.
Streptomycin is an aminoglycoside antibiotic that binds to the 30S subunit of bacterial ribosomes, disrupting protein synthesis and leading to growth inhibition or death of susceptible bacteria, particularly many gram-negative rods and some gram-positive species. When incorporated into PDA at typical working concentrations (commonly around 100 µg/mL = 100 mg/L), streptomycin markedly reduces bacterial colony formation while leaving most filamentous fungi and yeasts largely unaffected, since fungi lack the bacterial-type ribosomes that streptomycin targets. PDA already favors fungi over many bacteria due to its nutrient profile and mildly acidic pH; the addition of streptomycin further suppresses susceptible bacteria, creating a selective environment where fungal colonies can grow, spread, and sporulate without being overgrown by bacterial contaminants.
* 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
