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Table 4 Antibacterial activity of Z.zerumbet extracts (three month leaf and nine month rhizome and stem) and antibiotics against bacterial strains

From: Variation in secondary metabolite production as well as antioxidant and antibacterial activities of Zingiber zerumbet (L.) at different stages of growth

Bacterial Strains   Inhibition zone (mm)
Leaf Stem Rhizome Gentamicin Ciprofloxacin DMSO:water (1:9 v/v)
Staphylococcus aureus 8.7 ± 0.291a 1.4 ± 0.173d 7.3 ± 0.337b 6.5 ± 0.277c 7.3 ± 0.276b NO
Bacillus subtilis 5.1 ± 0.188c 1.2 ± 0.229e 5.9 ± 0.121a 5.6 ± 0.114b 4.8 ± 0.129d NO
Listeria monocytogenes 1.0 ± 0.164d NO 1.8 ± 0.367c 4.0 ± 0.127ab 4.2 ± 0.119a NO
Escherichia coli 1.5 ± 0.146c NO 3.5 ± 0.322b 5.4 ± 0.318a 5.5 ± 0.337a NO
Salmonella typhimurium 4.1 ± 0.267d NO 5.3 ± 0.379c 7.2 ± 0.272a 6.8 ± 0.252b NO
Pseudomonas aeruginosa 5.6 ± 0.218c NO 7.0 ± 0.381a 6.2 ± 0.365b 6.7 ± 0.322a NO
  1. All analyses are the mean of triplicate measurements ± standard deviation. Means not sharing a common letter in each row were significantly different at P ≤ 0.05; NO: not observed