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- W2159310312 abstract "ABSTRACT Nosocomial infections are the fourth leading cause of morbidity and mortality in the United States, resulting in 2 million infections and ∼100,000 deaths each year. More than 60% of these infections are associated with some type of biomedical device. Staphylococcus epidermidis is a commensal bacterium of the human skin and is the most common nosocomial pathogen infecting implanted medical devices, especially those in the cardiovasculature. S. epidermidis antibiotic resistance and biofilm formation on inert surfaces make these infections hard to treat. Accumulation-associated protein (Aap), a cell wall-anchored protein of S. epidermidis , is considered one of the most important proteins involved in the formation of S. epidermidis biofilm. A small recombinant protein vaccine comprising a single B-repeat domain (Brpt1.0) of S. epidermidis RP62A Aap was developed, and the vaccine's efficacy was evaluated in vitro with a biofilm inhibition assay and in vivo in a murine model of biomaterial-associated infection. A high IgG antibody response against S. epidermidis RP62A was detected in the sera of the mice after two subcutaneous immunizations with Brpt1.0 coadministered with Freund's adjuvant. Sera from Brpt1.0-immunized mice inhibited in vitro S. epidermidis RP62A biofilm formation in a dose-dependent pattern. After receiving two immunizations, each mouse was surgically implanted with a porous scaffold disk containing 5 × 10 6 CFU of S. epidermidis RP62A. Weight changes, inflammatory markers, and histological assay results after challenge with S. epidermidis indicated that the mice immunized with Brpt1.0 exhibited significantly higher resistance to S. epidermidis RP62A implant infection than the control mice. Day 8 postchallenge, there was a significantly lower number of bacteria in scaffold sections and surrounding tissues and a lower residual inflammatory response to the infected scaffold disks for the Brpt1.0-immunized mice than for of the ovalbumin (Ova)-immunized mice." @default.
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- W2159310312 date "2014-06-11" @default.
- W2159310312 modified "2023-10-02" @default.
- W2159310312 title "A Single B-Repeat of Staphylococcus epidermidis Accumulation-Associated Protein Induces Protective Immune Responses in an Experimental Biomaterial-Associated Infection Mouse Model" @default.
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- W2159310312 doi "https://doi.org/10.1128/cvi.00306-14" @default.
- W2159310312 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4178571" @default.
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