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Terminology: Bactericidal Activity Value
Bactericidal Activity Value
A standard test method issued by the Japan Textile Evaluation Technology Council (JTETC), to determine the bactericidal activity of fabrics (textiles) in which specific bacterial strains are challenged against the antibacterial textile over a 18 hours contact time.
Two categories to determine antibacterial activity: For “General Applications” and for “Specific Applications”. For articles for “General Applications” the test is conducted using Staphylococcus aureus and Klebsiella pneumonia bacteria. For articles for “Specific Applications” the test is conducted using the Staphylococcus aureus, Methicillin Resistant staphylococcus aureus (MRSA) and Klebsiella pneumoniae. The logarithmic value greater than “zero” is considered as “bacteriostatic” or “bactericidal” article respectively.
A：Number of living bacteria immediately after inoculation
C：Number of living bacteria on treated fabric after 18 hours of cultivation
Bactericidal activity value ＝ ｌｏｇ ─── ≧ ０
Bactericidal activity value ＝ ｌｏｇ ─── ＞ ０