The respiratory system is responsible for gas exchange in animals-that is, the respiratory system transfers oxygen and carbon dioxide from the air to the circulatory system, and vice versa, across the respiratory surface. Different organisms utilize different methods of respiration.
Vancomycin is a branched tricyclic glycosylated peptide with bactericidal activity against most organisms and bacteriostatic effect on enterococci.
1 Enterococci (genus Enterococcus) are bacteria that commonly live in the bowel and are usually resistant to many antibiotics. VRE are enterococci that have become resistant to the antibiotic vancomycin.  There are only a few antibiotics that are able to treat VRE infections.