what is the difference between a narrow spectrum antibiotic and a broad spectrum antibiotic?
 A narrow-spectrum antibiotic is only active against potential pathogens.Broad-spectrum antibiotics kill both potential pathogens and also the normal flora. A narrow-spectrum antibiotic acts only against specific families of bacteria. A broad-spectrum antibiotic acts against many different kinds of disease-causing bacteria, including both gram-positive and gram-negative bacteria. A narrow-spectrum antibiotic acts only against specific families of bacteria.Narrow spectrum antibiotics are only effective against a narrow group of bacteria. Broad spectrum antibiotics can tackle a wide range of bacteria. 