{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T22:26:28Z","timestamp":1782599188970,"version":"3.54.5"},"reference-count":45,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T00:00:00Z","timestamp":1713398400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>The spread of antibiotic-resistant bacteria and the rise of emerging and re-emerging viruses in recent years constitute significant public health problems. Therefore, it is necessary to develop new antimicrobial strategies to overcome these challenges. Herein, we describe an innovative method to synthesize ligand-free silver nanoparticles by Pulsed Laser Ablation in Liquid (PLAL-AgNPs). Thus produced, nanoparticles were characterized by total X-ray fluorescence, zeta potential analysis, transmission electron microscopy (TEM), and nanoparticle tracking analysis (NTA). A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed to evaluate the nanoparticles\u2019 cytotoxicity. Their potential was evaluated against the enveloped herpes simplex virus type 1 (HSV-1) and the naked poliovirus type 1 (PV-1) by plaque reduction assays and confirmed by real-time PCR and fluorescence microscopy, showing that nanoparticles interfered with the early stage of infection. Their action was also examined against different bacteria. We observed that the PLAL-AgNPs exerted a strong effect against both methicillin-resistant Staphylococcus aureus (S. aureus MRSA) and Escherichia coli (E. coli) producing extended-spectrum \u03b2-lactamase (ESBL). In detail, the PLAL-AgNPs exhibited a bacteriostatic action against S. aureus and a bactericidal activity against E. coli. Finally, we proved that the PLAL-AgNPs were able to inhibit\/degrade the biofilm of S. aureus and E. coli.<\/jats:p>","DOI":"10.3390\/microorganisms12040820","type":"journal-article","created":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T07:55:54Z","timestamp":1713426954000},"page":"820","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Ligand-Free Silver Nanoparticles: An Innovative Strategy against Viruses and Bacteria"],"prefix":"10.3390","volume":"12","author":[{"given":"Maria Vittoria","family":"Morone","sequence":"first","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1648-4519","authenticated-orcid":false,"given":"Annalisa","family":"Chianese","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1654-8500","authenticated-orcid":false,"given":"Federica","family":"Dell\u2019Annunziata","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7406-9882","authenticated-orcid":false,"given":"Veronica","family":"Folliero","sequence":"additional","affiliation":[{"name":"Department of Medicine, Surgery and Dentistry \u201cScuola Medica Salernitana\u201d, 84081 Baronissi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erwin Pavel","family":"Lamparelli","sequence":"additional","affiliation":[{"name":"Department of Medicine, Surgery and Dentistry \u201cScuola Medica Salernitana\u201d, 84081 Baronissi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1426-0159","authenticated-orcid":false,"given":"Giovanna","family":"Della Porta","sequence":"additional","affiliation":[{"name":"Department of Medicine, Surgery and Dentistry \u201cScuola Medica Salernitana\u201d, 84081 Baronissi, Italy"},{"name":"Interdepartment Centre BIONAM, Universit\u00e0 di Salerno, via Giovanni Paolo I, 84084 Fisciano, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7991-8700","authenticated-orcid":false,"given":"Carla","family":"Zannella","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0395-7962","authenticated-orcid":false,"given":"Anna","family":"De Filippis","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3321-4331","authenticated-orcid":false,"given":"Gianluigi","family":"Franci","sequence":"additional","affiliation":[{"name":"Department of Medicine, Surgery and Dentistry \u201cScuola Medica Salernitana\u201d, 84081 Baronissi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1576-6290","authenticated-orcid":false,"given":"Massimiliano","family":"Galdiero","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, University of Campania \u201cL. Vanvitelli\u201d, 80138 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6392-468X","authenticated-orcid":false,"given":"Antonio","family":"Morone","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, Instituto di Struttura della Materia U.O. di Tito Scalo, 85050 Potenza, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,18]]},"reference":[{"key":"ref_1","unstructured":"Van Seventer, J.M., and Hochberg, N.S. (2017). International Encyclopedia of Public Health, Elsevier."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2547","DOI":"10.1007\/s13132-021-00811-z","article-title":"Infectious Diseases, Trade, and Economic Growth: A Panel Analysis of Developed and Developing Countries","volume":"13","author":"Ismahene","year":"2022","journal-title":"J. Knowl. 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