Tested micro-organisms Inhibition zone diameter in (mm)*at different concentrations of n-hexane extract in (mg/ml) 50 25 12.5 6.25 3.1 Gram positive Staphylococcus epidermidis Staphylococcus aureus 18 16.5 - 12.5 - - - - - - Gram negative Proteus sp. Klebsiella sp. Escherichia coli Enterococcus sp. Pseudomonas florescent 20.5 - 18 15.5 12 - - - - - - - - - - - - - - - - - - - Fungi Candida albicans 14 - - - - n-hexane - - - - - *Diameter of inhibition zones including diameter of well 6 mm. – No inhibition was observed. Values are given as mean of triplicate experiment.

Table 3: Antimicrobial activities of n-hexane extract of Zingiber officinale rhizomes and n-hexane (negative control).