Thermo Scientific™ Catarrhalis Test Disk

Description

Detect butyrate esterase to rapidly identify Moraxella catarrhalis isolated from clinical specimens with Thermo Scientific™ Remel™ Catarrhalis Test Disk.

The rapid identification of Moraxella catarrhalis is important, since most strains produce beta-lactamase and are resistant to penicillin and ampicillin. Conventional methods used to identify M. catarrhalis may take up to 48 hours to perform^3,4. In 1962, Berger suggested that detection of butyrate esterase can be used as a rapid method to identify M. catarrhalis.¹

Detect butyrate esterase to presumptively identify Moraxella catarrhalis using the reagent-impregnated Catarrhalis Test Disk. Moraxella catarrhalis is an important pathogen. Yeun et al. have reported that the isolation of M. catarrhalis from routine sputum cultures is associated with clinical infection.² Rapid identification of this organism is important, since most strains produce beta-lactamase and are resistant to penicillin and ampicillin.

• Ready to use: Reagent-impregnated disk. No further preparation required.
• Easy to detect: Visual detection of color change.
• Easy to interpret:
  • Positive test- blue-green color development within 2 minutes
  • Negetive test- no color development within 2 minutes.

Catarrhalis Test Disk is impregnated with indoxyl butyrate as the reactive ingredient. The enzyme butyrate esterase releases indoxyl from indoxyl butyrate and spontaneously forms indigo in the presence of oxygen⁵. This color change allows rapid detection of M. catarrhalis.

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Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.