An Antibiotic Is Given Repeatedly to Treat a Recurrent Ear

question 47

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

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Definitions:

Congenital Cataract

A vision impairment present at birth where the lens of the eye is cloudy or opaque, affecting clarity of vision.

Depth Perception

The ability to perceive the distance of objects from each other and from ourselves.

Visual Acuity

Sharpness of vision.

Visual Tracking

The ability to smoothly follow moving objects with one's eyes.