Immunology USMLE Step 1 Practice Question
A 17 year old boy is evaluated for recurrent sinusitis and chronic watery diarrhea. He has had two prior episodes of Giardia lamblia infection. He is otherwise healthy. Serum immunoglobulin studies show markedly decreased IgA with normal IgG and IgM. Which of the following additional complications is this patient most at risk for?
Answer choices
- AChronic mucocutaneous candidiasis due to AIRE mutation
- BAplastic crisis after parvovirus B19 infection
- CNeisseria meningitidis sepsis due to terminal complement deficiency
- DRecurrent staphylococcal abscesses due to neutrophil oxidative burst failure
- EAnaphylaxis after blood transfusionCorrect answer
- FAutoimmune hemolytic anemia due to IgG anti-RBC antibodies
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