Which statement is true regarding narrow spectrum antibiotics?
They are effective against gram-positive bacteria only.
They are effective against gram-negative bacteria only.
They are effective against one type of organism.
They are effective against a few types of organisms.
The Correct Answer is D
They are effective against a few types of organisms. Narrow spectrum antibiotics are antibiotics that work against a limited range of bacteria, usually either gram-positive or gram-negative. They are more specific and less likely to cause resistance or disrupt the normal flora.
Choice A) They are effective against gram-positive bacteria only. This is not true because some narrow spectrum antibiotics can also target gram-negative bacteria, such as aminoglycosides.
Choice B) They are effective against gram-negative bacteria only. This is not true because some narrow spectrum antibiotics can also target gram-positive bacteria, such as vancomycin.
Choice C) They are effective against one type of organism. This is too restrictive because narrow spectrum antibiotics can work against more than one type of organism, such as penicillins that target both streptococci and staphylococci.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C"]
Explanation
Oxacillin, erythromycin and clindamycin are all antibiotics that are sensitive to Staphylococcus aureus according to the culture and sensitivity report.
This means that they can inhibit or kill the bacteria that are causing the wound infection.These antibiotics belong to different classes of drugs that have different mechanisms of action and spectrum of activity.
Choice D and E are wrong because vancomycin and linezolid are antibiotics that are usually reserved for more resistant strains of Staphylococcus aureus, such as methicillin-resistant Staphylococcus aureus (MRSA) or
Correct Answer is B
Explanation
This is because oseltamivir is aneuraminidase inhibitor, which means it blocks the enzyme that helps the influenza virus to spread from cell to cell. By preventing the release of new virus particles, oseltamivir reduces the duration and severity of influenza infection.
Choice A is wrong becauseAcyclovir is wrong because it is anucleoside analogthat inhibits viral DNA synthesis.
It is effective against herpes simplex virus (HSV) and varicella zoster virus (VZV), but not against influenza virus.
Choice C is wrong because Efavirenz is wrong because it is a **non-nucleoside reverse transcript
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