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Zorluk: OrtaPreventive Care and Immunizations

A 2-month-old boy is brought to the clinic for a routine well-child visit. He was born at 39 weeks gestation via an uncomplicated vaginal delivery. His mother has a history of severe Crohn's disease that was well controlled during pregnancy with intravenous infliximab. She received her last infusion of infliximab at 35 weeks gestation. The infant is exclusively breastfed and is gaining weight appropriately. His vital signs and physical examination are unremarkable. The mother asks about the infant's scheduled 2-month immunizations, which typically include the diphtheria, tetanus, and acellular pertussis (DTaP); Haemophilus influenzae type b (Hib); inactivated poliovirus (IPV); pneumococcal conjugate (PCV); and rotavirus vaccines. Which of the following is the most appropriate immunization plan for this patient today?

  1. A
    Administer all routine vaccines as scheduled, including the rotavirus vaccine
  2. B
    Administer DTaP, Hib, and PCV, but withhold IPV and the rotavirus vaccine
  3. Administer DTaP, Hib, IPV, and PCV, but withhold the rotavirus vaccineCevap
  4. D
    Withhold all routine vaccines until the infant is 6 months of age and achieves normal developmental milestones
  5. E
    Administer the rotavirus vaccine, but withhold the inactivated vaccines to avoid overwhelming the immune system

Cevap

Administer DTaP, Hib, IPV, and PCV, but withhold the rotavirus vaccine
This infant requires modification of the routine 2-month immunization schedule due to in utero exposure to infliximab. Infliximab is an IgG monoclonal antibody targeting TNF-alpha. During the third trimester, maternal IgG is actively transported across the placenta to provide passive immunity to the fetus. As a result, therapeutic biologics also cross the placenta, leading to clinically significant drug levels in the newborn that can persist for up to 6 months. Therefore, this infant is considered functionally immunocompromised. The rotavirus vaccine is a live-attenuated oral vaccine and is strictly contraindicated in immunocompromised infants due to the risk of severe, vaccine-strain disseminated infection. In contrast, all inactivated vaccines (such as DTaP, Hib, IPV, and PCV) are safe, incapable of causing infection, and should be administered according to the normal chronological schedule to ensure the infant is protected.

Adım Adım Çözüm

1
Identify the patient's immune status based on maternal medication history.
The infant is considered transiently immunocompromised due to in utero exposure to infliximab (a TNF-alpha inhibitor) during the third trimester.
Biologic therapies like infliximab are IgG antibodies that actively cross the placenta and can persist in the infant's circulation for the first 6 months of life.
2
Determine the safety profile of the scheduled 2-month vaccines for an immunocompromised infant.
Inactivated vaccines (DTaP, Hib, IPV, PCV) are safe, whereas live-attenuated vaccines (rotavirus) are strictly contraindicated.
Live-attenuated vaccines can cause uncontrolled, severe disseminated infection in hosts with compromised cellular immunity.
3
Formulate the correct immunization plan.
Proceed with all routine inactivated vaccines but withhold the rotavirus vaccine.
This protects the infant against preventable illnesses without risking vaccine-induced disease.

Anahtar Kavram

Infants born to mothers receiving biologic therapies (e.g., TNF-alpha inhibitors) during the third trimester are considered immunocompromised for the first 6 months of life and must not receive live-attenuated vaccines, such as the rotavirus vaccine.
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Preventive Care and Immunizations

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