The child who is at highest risk of contracting pertussis is the:
partially vaccinated 4-year-old.
infant born at term.
child who came in contact with an infected person.
newborn whose mother was vaccinated with DTaP in the third trimester.
The Correct Answer is A
Rationale:
A. A partially vaccinated 4-year-old is at highest risk for pertussis because incomplete vaccination provides suboptimal immunity, leaving the child vulnerable to infection.
B. An infant born at term may have some passive maternal antibodies if the mother was vaccinated, offering partial protection.
C. A child who came in contact with an infected person is at risk, but the degree of susceptibility depends on immunity status. A fully vaccinated child has significantly lower risk.
D. A newborn whose mother received DTaP in the third trimester typically has transplacental antibodies, providing temporary protection during the first few months of life.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. The CDC recommends that the HPV vaccine series be initiated in males at ages 11–12 years for optimal immunogenic response and before potential exposure to HPV through sexual activity.
B. While vaccination between ages 13 and 16 is still effective, it is considered a catch-up period rather than the recommended age for routine initiation.
C. Ages 13–26 include catch-up vaccination for those who were not vaccinated earlier, but this is not the routine initial recommendation.
D. Age 8–9 is earlier than the recommended age for HPV vaccination and is generally not indicated unless specific high-risk factors are present.
Correct Answer is B
Explanation
Rationale:
A. A capillary lead level of 15 μg/dL is above the reference level of concern; it is not considered normal, so rescreening in a year is inappropriate.
B. Capillary (fingerstick) lead measurements can be affected by contamination and are used for initial screening. Elevated results should always be confirmed with a venous blood sample before taking further action.
C. Chelation therapy is reserved for significantly elevated venous lead levels (typically ≥45 μg/dL in children); it is not indicated at this stage without confirmation.
D. Home inspection for lead contamination is important if elevated lead levels are confirmed, but the first step after an abnormal capillary reading is to confirm with a venous sample.
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