Biocidal Activity of Metal Nanoparticles Synthesized by Fusarium solani against Multidrug-Resistant Bacteria and Mycotoxigenic Fungi | Zendy

Manal T. El Sayed | Zendy; Ashraf S. A. ElSayed | Zendy

Open Access

Biocidal Activity of Metal Nanoparticles Synthesized by Fusarium solani against Multidrug-Resistant Bacteria and Mycotoxigenic Fungi

Author(s) -

Manal T. El Sayed,

Ashraf S. A. ElSayed

Publication year - 2020

Publication title -

journal of microbiology and biotechnology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.601

H-Index - 64

eISSN - 1738-8872

pISSN - 1017-7825

DOI - 10.4014/jmb.1906.06070

Subject(s) - fusarium solani , chemistry , pyocyanin , microbiology and biotechnology , nuclear chemistry , bacteria , fusarium oxysporum , fourier transform infrared spectroscopy , silver nanoparticle , multiple drug resistance , antimicrobial , nanoparticle , materials science , biology , biofilm , organic chemistry , antibiotics , nanotechnology , chemical engineering , botany , quorum sensing , genetics , engineering

Antibiotic resistance by pathogenic bacteria and fungi is one of the most serious global public health problems in the 21 st century, directly affecting human health and lifestyle. Pseudomonas aeruginosa and Staphylococcus aureus with strong resistance to the common antibiotics have been isolated from Intensive Care Unit patients at Zagazig Hospital. Thus, in this study we assessed the biocidal activity of nanoparticles of silver, copper and zinc synthesized by Fusarium solani KJ 623702 against these multidrug resistant-bacteria. The synthesized Metal Nano-particles (MNPs) were characterized by UV-Vis spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and Zeta potential. The Fourier transform infrared spectroscopy (FTIR) result showed the presence of different functional groups such as carboxyl, amino and thiol, ester and peptide bonds in addition to glycosidic bonds that might stabilize the dispersity of MNPs from aggregation. The antimicrobial potential of MNPs by F. solani against the multidrug-resistant (MDR) P. aeruginosa and S. aureus in addition to the mycotoxigenic Aspergillus awamori , A. fumigatus and F. oxysporum was investigated, based on the visual growth by diameter of inhibition zone. Among the synthesized MNPs, the spherical AgNPs (13.70 nm) displayed significant effect against P. aeruginosa (Zone of Inhibition 22.4 mm and Minimum Inhibitory Concentration 21.33 µg/ml), while ZINC oxide Nano-Particles were the most effective against F. oxysporum (ZOI, 18.5 mm and MIC 24.7 µg/ml). Transmission Electron Microscope micrographs of AgNP-treated P. aeruginosa showed cracks and pits in the cell wall, with internalization of NPs. Production of pyocyanin pigment was significantly inhibited by AgNPs in a concentration-dependent manner, and at 5-20 µg of AgNPs/ml, the pigment production was reduced by about 15-100%, respectively.

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