Abstract:
Different solvent extracted samples from the leaves and fruits tissues of D. stramonium were tested against
five pathogenic microorganisms by disc diffusion susceptibility method using 1, 2 and 3mg disc-1
concentrations. Methanol and chloroform extracted fractions from both leaves and fruits measured good growth inhibition of all the tested microorganisms at all concentrations. Bacillus subtilis was very resistant to n-butanol and aqueous extracted fractions of fruits tissues at all the tested three concentrations. The growths of Pseudomonas aeruginosa and Klebsiella pnuemonia were efficiently reduced by all the solvent extracted fractions from the fruits while aqueous fraction was unable to restrain the growth of Bacillus subtilis. The growth of Candida albicans was effectively reduced by aqueous extracted fraction from the leaves tissue at the highest concentration. Maximum growth reduction of (77%) was shown by chloroform extracted fractions from the leaves against Klebsiella pneumonia at 3mg disc-1 concentration. Minimum zone of inhibition (35.4%) was measured by n-butanol extracted fractions from the leaves against Pseudomonas aeruginosa at the lowest concentrations of 1mg disc-1 . In case of leaves the most vulnerable bacteria was Bacillus subtilis
while in case of fruits Klebsiella pneumonia was the most susceptible while Bacillus subtilis was the most resistant one.
