An advantage of using a broad-spectrum antibiotic is that:
1. it is effective against a large number of organisms.
2. it is effective against a small number of organisms.
3. it has a high potency.
4. it produces a large number of side effects.
Correct Answer: 1
Rationale 1: A broad-spectrum antibiotic is effective against a large number of organisms.
Rationale 2: Narrow-spectrum antibiotics are effective against only one or a small group of organisms.
Rationale 3: Potency is the strength of an antibiotic and is not related to the concept of effectiveness.
Rationale 4: The presence of side effects is not related to the antibiotic spectrum.
Global Rationale: Broad-spectrum antibiotics are effective against a wide variety of different microbial species. These antibiotics may be started before results of culture and sensitivity are returned, especially if the infection is severe.
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