AATCC Test Method 147 : Antibacterial Activity Assessment of Textile Materials: Parallel Streak Method
AATCC 147 is a Qualitative test used to detect bacteriostatic activity on textile materials.
The test Method determines antibacterial activity of diffusable antimicrobial agents on treated textile materials.
The test is followed in the cases where
the antibacterial agent is migratory i.e diffusible through the agar.
The size of the zone of inhibition and the narrowing of the streaks caused by the presence of the antibacterial agent permit an estimate of the residual antibacterial activity after multiple washings.
Specimens of the test material, including corresponding untreated controls of the same material, are placed in intimate contact with growth agar which has been previously streaked with test organism.
After incubation, a clear area of interrupted growth underneath and along the sides of the test material indicates antibacterial activity of the specimen.
Sample Size according to AATCC 147: Rectangular specimens cut 25 × 50 mm
They can be any convenient size.
AATCC 147 Test Organism: Gram positive organism :Staphylococcus aureus, ATCC No. 6538.
Gram negative organism: Klebsiella pneumoniae, ATCC No. 4352.
Other organisms can also be used depending on the intended end-use.
Turn around Time : 5 to 7 days for commonly used organisms like mentioned in AATCC 147 test standard.
AATCC 147 Test Method Limitations
The method is not suitable for materials
which are not migratory and are unable to diffuse thru the bacterial growth medium.
To purchase a copy of AATCC 147 test method visit AATCC at AATCC.org
"Last updated 07/10/11