Question

A narrow spectrum antibiotic is active against .................
(a) gram positive or gram negative bacteria
(b) gram negative bacteria only
(c) single organism or one disease
(d) both gram positive and gram negative bacteria

Answer 1

Answer (a). A narrow spectrum antibiotic is active against gram positive or gram negative bacteria.
Antibiotics are now defined as chemical substances which in low concentration, either kill or Inhibit the growth of microorganisms by intervening in their metabolic processes. The full range of microorganisms attacked by an antibiotic is called its spectrum.