An Antibiotic Is Given Repeatedly to Treat a Recurrent Ear

question 41

Multiple Choice

An antibiotic is given repeatedly to treat a recurrent ear infection. It worked initially but now is no longer effective. This indicates that the Streptococcus bacterium

• A) is infectious only if it is sensitive to the antibiotic.
• B) is very sensitive to the antibiotic.
• C) is being treated with an antibiotic that has experienced a manufacturing error, making it infective.
• D) experienced natural selection that has allowed the resistant Streptococcus to survive and multiply.

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