AATCC 147 Assessment of Antimicrobial Finishes on Textile Materials: Parallel Streak Method

Purpose of Test

The AATCC 147 test method is a carrier-based, presumptive test method designed to quickly determine antibacterial activity of diffusible antimicrobial agents on treated textile materials. This method is generally used to substantiate antibacterial properties of treated fabric for non-public health related claims.

Summary of Test

In this method, bacterial test organisms such as Staphylococcus aureus and Klebsiella pneumoniae are streaked onto agar plates in a series of five streaks. Treated and untreated fabric samples are placed over the streaks and the plates are incubated. Following incubation, the samples are visually examined for zones of clearing and the treated materials are compared to the untreated control materials to draw conclusions about the degree of antibacterial activity observed. No regulated limits currently exist for general antibacterial claims made using this method.