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.
Penicillin Class Antibiotics. Antibiotics in the penicillin class disrupt the bacterial cell wall. These tend to be broad-spectrum antibiotics, except when they encounter bacteria that have a specific resistance. Amoxicillin is a type of penicillin used in dogs, and frequently is prescribed because it's well-absorbed in the gut.