Oxoid OPNG Discs

Oxoid OPNG Discs – Precise Beta‑Galactosidase Detection for Microbiology

Oxoid OPNG Discs are high‑quality, ready‑to‑use biochemical test discs designed for rapid detection of β‑galactosidase (β‑gal) activity in bacterial isolates. These discs are an essential tool in clinical microbiology laboratories, food testing labs, and research facilities for accurate identification of lactose‑fermenting bacteria.

What Are Oxoid OPNG Discs?

Oxoid OPNG Discs are filter‑paper discs impregnated with O‑Nitrophenyl‑β‑D‑Galactopyranoside (ONPG) — a chromogenic substrate used to test for β‑galactosidase enzyme production in bacteria. When a bacterial colony produces β‑galactosidase, it breaks down the ONPG compound, releasing o‑nitrophenol, which turns the medium yellow. This visible color change makes OPNG Discs ideal for rapid biochemical screening.

Key Features

• Reliable Biochemical Testing: Detects β‑galactosidase activity quickly and clearly.
• Easy to Use: Simple application on bacterial colonies with rapid visible results.
• Consistent Quality: Manufactured to Oxoid’s rigorous laboratory standards.
• Broad Application: Used in clinical, industrial, and food microbiology testing.

Applications of Oxoid OPNG Discs

• Identification of Enterobacteriaceae and other lactose‑fermenters
• Differentiation of bacterial strains in culture
• Routine biochemical profiling in diagnostic labs
• Research studies requiring enzymatic activity testing

Why Choose Oxoid OPNG Discs?

• Trusted Brand: Oxoid is recognized worldwide for dependable microbiological media and reagents.
• Fast Results: Visible color change accelerates identification workflows.
• Laboratory Quality: Manufactured with high‑purity reagents for consistent performance.

Important Note

Oxoid OPNG Discs are for laboratory use only. They are not medicinal products and are not used for patient treatment. Always follow lab safety protocols when handling microbial cultures and biochemical test materials.