Antimicrobial effect Article Candida albicans Eurycoma longifolia Eurycoma longifolia Jack Eurycoma longifolia extract Inhibition Lactobacillus Salivary isolate Streptococcus mutans ampicillin antimicrobial activity bacterial growth bacterium isolate broth dilution cell viability chlorhexidine controlled study dental caries disk diffusion drug isolation human microorganism minimum inhibitory concentration nonhuman nystatin plant root saliva zone of inhibition