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Q.

Which of the following is not a broad spectrum antibiotic ?

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a

Vancomycin

b

Penicillin G

c

Ampicillin

d

Ofloxacin

answer is D.

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Detailed Solution

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  • 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 Gram-positive or Gram-negative bacteria 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.
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