An 8-week-old male infant presents to a primary care clinic with his parents to establish care and receive standard immunizations. He was diagnosed with severe combined immunodeficiency shortly after birth due to an abnormal newborn screening result. The patient is currently asymptomatic, feeding well, and gaining weight appropriately. He is on prophylactic antimicrobial therapy and is scheduled for a hematopoietic stem cell transplant in the coming months. The parents ask the physician how his diagnosis affects his vaccination schedule today. Which of the following is the most appropriate immunization strategy for this patient at this visit?
- Withhold the oral rotavirus vaccine but administer the scheduled inactivated formulationsCevap
- BAdminister all standard age-appropriate vaccines including the oral rotavirus formulation
- CPostpone all immunizations entirely until immune reconstitution following the stem cell transplant
- DAdminister only the oral rotavirus formulation and delay all injectable vaccines to prevent bleeding
- EAdminister half the standard dose for all age-appropriate vaccines to prevent overwhelming his immune system
Cevap
Withhold the oral rotavirus vaccine but administer the scheduled inactivated formulations
The patient has severe combined immunodeficiency (SCID), characterized by profound defects in T-cell function. In such patients, live-attenuated vaccines can replicate unchecked and cause severe, life-threatening vaccine-strain infections. The oral rotavirus vaccine is a live-attenuated viral vaccine and is therefore absolutely contraindicated. Conversely, inactivated, recombinant, and toxoid-based vaccines cannot replicate and are considered safe. These should be administered according to the routine schedule to provide whatever degree of immunity the patient can generate prior to transplantation.
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Anahtar Kavram
Live-attenuated vaccines are absolutely contraindicated in patients with severe cellular immunodeficiencies.