Antimicrobial Activity Assessment of New Carpets, AATCC 174

Antimicrobial Testing >> Assessment of New Carpets

AATCC 174 Antimicrobial Activity Assessment of New Carpets

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Test Method(s):
    · AATCC 174

AATCC 174, Antimicrobial Activity Assessment of New Carpets

Scope: This test method is designed to determine the antimicrobial actiity of new carpet materials and consists of three procedures:

  • a qualitative antimbacterial assessment,
  • a quantitative antibacterial assessment, and
  • a qualtitative antifungal assessment.

We perform the antibacterial parts, not the antifungal.

Part I. Qualitative: Single Streak Method

This is similar to AATCC147 ( parallel streak method); the difference is that this is a single streak across the sterile plate. Both pile (face fibers) and the backing samples are done on separate plates. As with AATCC147 the withd of the zone of inhibition is determined after 24hr incubation.

Test organisms:

  • Staphylococcus aureus, ATCC6538
  • Klebsiella pneumoniae, ATCC4352
  • any other suitable organism

Part II. Quantitative Assessment

This part is similar to AATCC100. Test and control swatches are inoculated with the test organisms. After 24h incubation the bacteria are eluted from the swatches by shaking in known amounts of neutralizing solution. The number of bacteria present in this liquid is determined and the percentage reduction of the treated specimen is calculated.

In the absence of a control swatch the number of bacteria is determined between samples incubated at 0 hrs and 24 hrs.

Test organisms:

  • Staphylococcus aureus, ATCC6538
  • Klebsiella pneumoniae, ATCC4352
  • any other suitable organism