A nurse in a clinic is assessing a 7-month-old infant. Which of the following indicates a need for further evaluation?
Uses a pincer grasp
Has a fear of strangers
Shows preferences towards foods
Babbles one-syllable sounds
The Correct Answer is A
Choice A: Using a pincer grasp indicates a need for further evaluation, as it is a developmental milestone that is usually achieved by 9 to 10 months of age. A pincer grasp is the ability to pick up small objects using the thumb and index finger. A 7-month-old infant should be able to use a raking grasp, which is the ability to scoop up objects using all fingers.
Choice B: Having a fear of strangers does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. A fear of strangers is a sign of attachment and recognition of familiar and unfamiliar faces. A 7-month-old infant may cry, cling, or turn away from strangers.
Choice C: Showing preferences towards foods does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. Showing preferences towards foods is a sign of individuality and taste development. A 7-month-old infant may accept or reject certain foods based on their flavor, texture, or appearance.
Choice D: Babbling one-syllable sounds does not indicate a need for further evaluation, as it is a normal and expected behavior for a 7-month-old infant. Babbling one-syllable sounds is a sign of language and communication development. A 7-month-old infant may make sounds such as "ba", "da", "ga", or "ma".
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: This choice is incorrect because mumps is not the common name for pertussis. Mumps is a viral infection that causes inflammation of the salivary glands, especially the parotid glands. It may cause symptoms such as fever, headache, and swelling of the cheeks or jaw. It can be prevented by vaccination with the measles-mumps-rubella (MMR) vaccine.
Choice B reason: This choice is correct because whooping cough is the common name for pertussis. Pertussis is a bacterial infection that causes severe coughing spells, which may be followed by a high-pitched whoop sound or vomiting. It may cause complications such as pneumonia, seizures, or brain damage, especially in infants and young children. It can be prevented by vaccination with the diphtheria-tetanus-pertussis (DTaP) vaccine.
Choice C reason: This choice is incorrect because the fifth disease is not the common name for pertussis. The fifth disease is a viral infection that causes a rash on the face, trunk, and limbs, which may resemble a slapped cheek appearance. It may cause mild symptoms such as fever, runny nose, or joint pain. It usually affects children and is self-limiting.
Choice D reason: This choice is incorrect because chickenpox is not the common name for pertussis. Chickenpox is a viral infection that causes an itchy rash with fluid-filled blisters all over the body. It may cause symptoms such as fever, headache, or loss of appetite. It can be prevented by vaccination with the varicella-zoster (VZV) vaccine.

Correct Answer is B
Explanation
Choice A: This test will not indicate if the child has rheumatic fever, as rheumatic fever is a complication of an untreated or inadequately treated streptococcal infection that affects the heart, joints, skin, and brain. Rheumatic fever is diagnosed based on clinical criteria, such as carditis, polyarthritis, chorea, erythema marginatum, and subcutaneous nodules.
Choice B: This test will confirm if the child had a recent streptococcal infection, as antistreptolysin O (ASO) is an antibody that the body produces in response to streptococcal bacteria. A high ASO titer indicates that the child was exposed to streptococcal bacteria within the past few weeks. A streptococcal infection can cause pharyngitis, tonsillitis, scarlet fever, or impetigo.
Choice C: This test will not indicate if the child has a therapeutic blood level of an aminoglycoside, as an aminoglycoside is a type of antibiotic that is used to treat serious bacterial infections. A therapeutic blood level of an aminoglycoside means that the drug is effective and safe in the body. A therapeutic blood level of an aminoglycoside is measured by a peak and trough level.
Choice D: This test will not confirm if the child has immunity to streptococcal bacteria, as immunity to streptococcal bacteria means that the body can resist or fight the infection. Immunity to streptococcal bacteria can be acquired by natural exposure or vaccination. Immunity to streptococcal bacteria is measured by an antibody titer or a skin test.

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