Phage therapy is a promising tool against infection sustained by antibiotic resistant bacteria. Recently, a further advantage has been envisaged, in what some phages infect bacteria inside the biofilms, where antibiotics are poorly active. We evaluated the activity of E. faecalis phage Φ1.1, a new Myoviridae virus of the Spounavirinae subfamily, on 15 isolates from inpatients admitted to the Careggi University Hospital of Florence, Italy. Results: Genomic analysis showed that Φ1.1 is characterized by a linear dsDNA of 143.5 Kb (%GC=35.8) ending with terminal repeats of 1911 bp. The closest homologue of ΦΦEF24C, a previously described broad-range, lytic phage of E. faecalis, to which Φ1.1 display a 98% nucleotide identity. A total of 203 ORFs can be observed in the Φ1.1 genome, with 4 of these that potentially encodes proteins related to digestion of bacterial cell wall. The phage infects 8 of the 15 strains that we tested. These strains were also infected in stationary phase of growth although with a lower efficiency. The production of biofilm by E.faecalis isolates was evaluated and its measured by Crystal-Violet staining after phage infection. Phage Φ1.1 was able to reduce the biofilm. This effect was observed also on the 7 strains that were not permissive for phage replication. The confocal microscopy biofilm analysis confirmed these results.
Marmo, P., Perini, N., Krasojevic, K., Romano, E., Thaller, M.c., D'Andrea, M.m., et al. (2018). SELECTION AND CHARACTERISATION OF PHAGES ABLE TO DEGRADE BIOFILM PRODUCED BY CLINICAL ISOLATES OF E. FAECALIS. In Abstract Book Congresso.
|Autori:||Marmo, P; Perini, N; Krasojevic, K; Romano, E; Thaller, Mc; D'Andrea, Mm; Frezza, D; Di Lallo, G|
|Titolo:||SELECTION AND CHARACTERISATION OF PHAGES ABLE TO DEGRADE BIOFILM PRODUCED BY CLINICAL ISOLATES OF E. FAECALIS|
|Nome del convegno:||Targeting Phage & Antibiotic Resistance|
|Luogo del convegno:||Firenze|
|Anno del convegno:||2018|
|Data di pubblicazione:||2018|
|Settore Scientifico Disciplinare:||Settore BIO/19|
|Tipologia:||Intervento a convegno|
|Citazione:||Marmo, P., Perini, N., Krasojevic, K., Romano, E., Thaller, M.c., D'Andrea, M.m., et al. (2018). SELECTION AND CHARACTERISATION OF PHAGES ABLE TO DEGRADE BIOFILM PRODUCED BY CLINICAL ISOLATES OF E. FAECALIS. In Abstract Book Congresso.|
|Appare nelle tipologie:||02 - Intervento a convegno|