Antimicrobial Effect of Eco- Friendly Silver Nanoparticles Synthesis by Iraqi Date Palm (Phoenix dactylifera) on Gram-Negative Biofilm-Forming Bacteria

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shaimaa obaid hasson
Sumod Abdul kadhem Salman
Shurooq Falah Hassan
Shatha Mohammed Abbas

Abstract

Date palm silver nanoparticles are a green synthesis method used as antibacterial agents. Today,
there is a considerable interest in it because it is safe, nontoxic, low costly and ecofriendly. Biofilm bacteria
existing in marketed local milk is at highly risk on population health and may be life-threatening as most
biofilm-forming bacteria are multidrug resistance. The goal of current study is to eradicate biofilm-forming
bacteria by alternative treatment green synthesis silver nanoparticles. The biofilm formation by bacterial
isolates was detected by Congo red method. The silver nanoparticles were prepared from date palm
(khestawy) fruit extract. The formed nanoparticles were characterized with UV-Vis and AFM. The
antibacterial activity of synthetic silver nanoparticles was evaluated by agar well diffusion method. Gramnegative bacteria isolates were E. coli in 3 isolates and Klebsiella pneumoniae in 5 isolates and all are
biofilm producer. The size of synthetic green silver nanoparticles is 18 nm and the generation of silver
nanoparticles was confirmed by change of date extract color from yellow to brown with an absorption
maximum at 410 nm. Highly antibacterial activity of silver nanoparticles was recorded in comparison to
plant extract and silver nitrate against gram-negative biofilm-forming bacteria. From this study, the
antibacterial activity of date palm silver nanoparticles was more efficient to eradicate gram negative biofilmforming bacteria isolated from marketed local milk

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1.
hasson shaimaa obaid, Salman SA kadhem, Hassan SF, Abbas SM. Antimicrobial Effect of Eco- Friendly Silver Nanoparticles Synthesis by Iraqi Date Palm (Phoenix dactylifera) on Gram-Negative Biofilm-Forming Bacteria. Baghdad Sci.J [Internet]. [cited 2021Aug.4];18(4):1149. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3543
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