Green-synthesized silver nanoparticles by using fresh Justicia Secunda, Telfairia Occidentalis, and Jatropha Tanjorensis aqueous leaf extracts against clinical and environmental bacterial isolates

Synthesis of silver nanoparticles (AgNPs) are one of the most vital and fascinating nanomaterials among several metallic nanoparticles that are picking up significantly worldwide as a result of their importance in biomedical applications. This study aimed to investigate the antibacterial activities of green synthesized silver nanoparticles by using three Nigerian fresh leaf extracts (Justicia secunda, Telfairia occidentalis, and Jatropha tanjorensis) on clinical and environmental bacterial isolates. The green synthesized AgNPs were characterized by using UV-Vis spectrophotometry, Fourier transform infrared (FT-IR), and Scanning electron microscopy (SEM), and screened for their antibacterial activity by using Agar diffusion method. Our result showed that the green synthesized AgNPs from the three Nigerian vegetables exhibited the moderate antibacterial potentials against selected clinical and environmental bacterial isolates.  In conclusion, the green synthesized AgNPs by using fresh Justicia secunda, Telfairia occidentalis, and Jatropha tanjorensis leaf extracts have antibacterial properties with therapeutic potential in treatment, management, and/or prevention of bacterial infections, and may be promising source for the development of chemotherapeutic (antibiotic) agents in the future.