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  • A limited spectrum antibiotic is active against?Option: 1 Gram-positive bacteriaOption: 2 G

A limited spectrum antibiotic is active against?

Option: 1

Gram-positive bacteria


Option: 2

Gram-negative bacteria


Option: 3

Both gram-positive bacteria or gram-negative bacteria


Option: 4

Single organism or disease


Answers (1)

best_answer

The range of bacteria or other microorganisms that are affected by a certain antibiotic is expressed as its spectrum of action.

Antibiotics which kill or inhibit a wide range of Gram-positive and Gram-negative bacteria are said to be broad-spectrum antibiotics. Those effective mainly against either Gram-positive or Gram-negative bacteria but not both are narrow-spectrum antibiotics.

If effective against a single organism or disease, they are referred to as limited spectrum antibiotics.

Penicillin G has a narrow spectrum. Ampicillin and Amoxycillin are synthetic modifications of penicillins. These have broad spectrum.

So, A limited-spectrum antibiotic is active against a single organism or disease.

So, Option 4 is correct. 

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