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• W4200426316 abstract "Prophages affect bacterial fitness on multiple levels. These include bacterial infectivity, toxin secretion, virulence regulation, surface modification, immune stimulation and evasion and microbiome competition. Lysogenic conversion arms bacteria with novel accessory functions thereby increasing bacterial fitness, host adaptation and persistence, and antibiotic resistance. These properties allow the bacteria to occupy a niche long term and can contribute to chronic infections and inflammation such as chronic rhinosinusitis (CRS). In this study, we aimed to identify and characterize prophages present in Staphylococcus aureus from patients suffering from CRS in relation to CRS disease phenotype and severity. Prophage regions were identified using PHASTER. Various in silico tools like ResFinder and VF Analyzer were used to detect virulence genes and antibiotic resistance genes respectively. Progressive MAUVE and maximum likelihood were used for multiple sequence alignment and phylogenetics of prophages respectively. Disease severity of CRS patients was measured using computed tomography Lund-Mackay scores. Fifty-eight S. aureus clinical isolates (CIs) were obtained from 28 CRS patients without nasal polyp (CRSsNP) and 30 CRS patients with nasal polyp (CRSwNP). All CIs carried at least one prophage (average=3.6) and prophages contributed up to 7.7 % of the bacterial genome. Phage integrase genes were found in 55/58 (~95 %) S. aureus strains and 97/211 (~46 %) prophages. Prophages belonging to Sa3int integrase group (phiNM3, JS01, phiN315) (39/97, 40%) and Sa2int (phi2958PVL) (14/97, 14%) were the most prevalent prophages and harboured multiple virulence genes such as sak, scn, chp, lukE/D, sea. Intact prophages were more frequently identified in CRSwNP than in CRSsNP (P=0.0021). Intact prophages belonging to the Sa3int group were more frequent in CRSwNP than in CRSsNP (P=0.0008) and intact phiNM3 were exclusively found in CRSwNP patients (P=0.007). Our results expand the knowledge of prophages in S. aureus isolated from CRS patients and their possible role in disease development. These findings provide a platform for future investigations into potential tripartite associations between bacteria-prophage-human immune system, S. aureus evolution and CRS disease pathophysiology." @default.
• W4200426316 created "2021-12-31" @default.
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• W4200426316 date "2021-12-15" @default.
• W4200426316 modified "2023-09-25" @default.
• W4200426316 title "Prophages encoding human immune evasion cluster genes are enriched in Staphylococcus aureus isolated from chronic rhinosinusitis patients with nasal polyps" @default.
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• W4200426316 doi "https://doi.org/10.1099/mgen.0.000726" @default.
• W4200426316 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34907894" @default.
• W4200426316 hasPublicationYear "2021" @default.
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