NCIt definition : A branched tricyclic glycosylated peptide with bactericidal activity against most
organisms and bacteriostatic effect on enterococci. At a site different from that
of penicillins and cephalosporins, vancomycin binds tightly to the D-alanyl-D-alanine
portion of cell wall precursors, thereby interfering with bacterial cell wall synthesis.
This leads to activation of bacterial autolysins that destroy the cell wall by lysis.
Vancomycin may also alter the permeability of bacterial cytoplasmic membranes and
may selectively inhibit RNA synthesis.;
Alternative definition : NCI-GLOSS: An antibiotic drug used to fight resistant bacterial infections.;