Abstract
The aim of this study was to green synthesis and investigates the antimicrobial activities of Aster squamatus flower (ASF) extract and their silver nanoparticle (ASFAg) counter to numeral clinical pathogenic microbial. The biocompatible silver nanoparticle (ASFAg) was investigated by means of UV-Vis spectroscopy, X-ray diffraction and scanning electron microscopy (SEM) methods. The prepared ASFAg revealed a strong surface plasmon resonance (SPR) absorption band at 432 nm. In the results, all growth of the investigated pathogenic microbial strains had been ceased in varied range by the silver nanoparticles potent than the crude extract of Aster squamatus flower. ASF extract showed week antimicrobial activities against Salmonella typhi, Enterococcus faecalis, Staphylococcus saprophyticus, Staphylococcus aureus, Shigella dysenteriae and Proteus mirabilis with inhibition zone between (10.33 mm to 18.33 mm) while no activities against Klebsiella pneumoniae, Candida albicans and Pseudomonas aeruginosa. Klebsiella pneumonia is the best prone microbes with inhibition zone (29.00 mm), while Enterococcus faecalis and Shigella dysenteriae establish as the lowermost prone microbes of inhibition zone between (12.67 mm to 13.33 mm) by ASFAg. As a result, ASFAg perhaps could be significant pharmacological drugs counter to specific microbial strains.