{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T21:40:28Z","timestamp":1773697228705,"version":"3.50.1"},"reference-count":121,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2024,8,29]],"date-time":"2024-08-29T00:00:00Z","timestamp":1724889600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\/MCTES","award":["UIDP\/50017\/2020+UIDB\/50017\/2020+LA\/P\/0094\/2020"],"award-info":[{"award-number":["UIDP\/50017\/2020+UIDB\/50017\/2020+LA\/P\/0094\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>Pseudomonas aeruginosa is a common cause of hospital-acquired infections and exhibits a strong resistance to antibiotics. An alternative treatment option for bacterial infections is the use of bacteriophages (or phages). In this study, two distinct phages, VB_PaD_phPA-G (phPA-G) and VB_PaN_phPA-Intesti (phPA-Intesti), were used as single suspensions or in a phage cocktail to inactivate the planktonic cells and biofilms of P. aeruginosa. Preliminary experiments in culture medium showed that phage phPA-Intesti (reductions of 4.5\u20134.9 log CFU\/mL) outperformed phPA-G (reductions of 0.6\u20132.6 log CFU\/mL) and the phage cocktail (reduction of 4.2 log CFU\/mL). Phage phPA-Intesti caused a maximum reduction of 5.5 log CFU\/cm2 in the P. aeruginosa biofilm in urine after 4 h of incubation. The combination of phage phPA-Intesti and ciprofloxacin did not improve the efficacy of bacterial inactivation nor reduce the development of resistant mutants. However, the development of resistant bacteria was lower in the combined treatment with the phage and the antibiotic compared to treatment with the antibiotic alone. This phage lacks known toxins, virulence, antibiotic resistance, and integrase genes. Overall, the results suggest that the use of phage phPA-Intesti could be a potential approach to control urinary tract infections (UTIs), namely those caused by biofilm-producing and multidrug-resistant strains of P. aeruginosa.<\/jats:p>","DOI":"10.3390\/microorganisms12091795","type":"journal-article","created":{"date-parts":[[2024,8,29]],"date-time":"2024-08-29T11:33:37Z","timestamp":1724931217000},"page":"1795","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["The Potential of Phage Treatment to Inactivate Planktonic and Biofilm-Forming Pseudomonas aeruginosa"],"prefix":"10.3390","volume":"12","author":[{"given":"In\u00eas","family":"Martinho","sequence":"first","affiliation":[{"name":"Department of Biology and CESAM, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2510-612X","authenticated-orcid":false,"given":"M\u00e1rcia","family":"Braz","sequence":"additional","affiliation":[{"name":"Department of Biology and CESAM, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Jo\u00e3o","family":"Duarte","sequence":"additional","affiliation":[{"name":"Department of Biology and CESAM, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Ana","family":"Br\u00e1s","sequence":"additional","affiliation":[{"name":"Department of Biology and CESAM, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4223-0851","authenticated-orcid":false,"given":"Vanessa","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Biology and CESAM, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1934-0091","authenticated-orcid":false,"given":"Newton C. 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