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Table 3 Antimicrobial effect of AR rhizome extract at different concentrations

From: Evaluation of chemical constituents and in vitro antimicrobial, antioxidant and cytotoxicity potential of rhizome of Astilbe rivularis (Bodho-okhati), an indigenous medicinal plant from Eastern Himalayan region of India

Extract concentration and Zone of inhibition (mm) Standard antibiotics
Plant Microbes 20 mg/ml 40 mg/ml 60 mg/ml 80 mg/ml 100 mg/ml aAmp. bTet.
Astilbe rivularis B.subtilis 15 16 16 17 17 25 35
B.amyloliquefaciens 16 20 23 24 24 27 35
A.liquefaciens 13 18 18 20 23 30 40
Flexibactor sp. 14 17 18 20 20 18 34
Pseudomonas sp. - 12 14 17 24 33
  1. aAmp. - Ampicillin at 2 μg ml−1 concentration
  2. bTet. – Tetracyclin at 30 μg ml−1 concentration