Question

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Answer 1

Carbon compounds obtained from some bacteria and fungi for destroying or preventing the growth of harmful micro - organisms are called antibiotics. Antibiotics, a discovery of the 20th century, have brought a revolution in the field of medicine. Antibiotics mainly act against bacteria. Some antibiotics can destroy protozoa. Some antibiotics are useful against a wide variety of bacteria they are called broadspectrum antibiotics. Examples – Ampicillin, amoxicillin, tetracycline, etc. When the pathogen cannot be identified even though the symptoms of the disease are visible, broad-spectrum antibiotics are used. Whenever a pathogenic micro-organism is definitely known, then narrow-spectrum antibiotics are used. Examples: Penicillin, gentamycin, erythromycin, etc.