Match each pediatric patient scenario involving an infectious exposure or specific risk factor with the most appropriate immediate preventive care intervention or post-exposure prophylaxis.
- A 9-month-old healthy infant scheduled to travel to a measles-endemic country in 2 weeks.Administer one dose of MMR vaccine now; restart the routine 2-dose series at age 12-15 months.
- A 2-day-old neonate whose mother developed a diffuse vesicular rash 24 hours prior to delivery.Administer Varicella-Zoster Immune Globulin (VZIG) to the newborn.
- A 4-month-old infant whose 6-year-old sibling was recently diagnosed with culture-positive pertussis.Prescribe a 5-day course of azithromycin for the infant.
- An unimmunized 8-year-old boy who sustained a deep, soil-contaminated puncture wound to the foot.Administer Tdap vaccine and Tetanus Immune Globulin (TIG).
- A 12-hour-old preterm neonate (birth weight 1,800 g) born to a mother with undocumented HBsAg status.Administer Hepatitis B vaccine and Hepatitis B Immune Globulin (HBIG) concurrently.
Answer
The correct matches align specific post-exposure and travel scenarios with their respective, time-sensitive immunoprophylaxis and chemoprophylaxis guidelines.
Appropriate preventive care requires tailoring interventions strictly to the clinical scenario. Early MMR protects young travelers but must be repeated later. VZIG provides critical passive immunity when maternal varicella occurs peripartum. Macrolide prophylaxis halts pertussis transmission in households. Tetanus prophylaxis for dirty wounds in unimmunized patients requires both TIG and a vaccine (Tdap for >7 years). Preterm infants (<2,000 g) with unknown maternal HBsAg need both HepB vaccine and HBIG immediately due to their blunted immune response.
Step-by-Step Solution
Key Concept
Post-exposure prophylaxis and specialized catch-up/travel immunizations require precise application of guidelines based on patient age, weight, and the exact timing and nature of the exposure.