Bacterial Infections USMLE Step 1 Practice Question
A 3 month old boy is brought to clinic for poor feeding, weak cry, constipation, and progressive lethargy. His parents recently began giving him small amounts of honey for cough. Examination shows hypotonia, ptosis, and decreased deep tendon reflexes. Which of the following is the best explanation for this patient’s illness?
Answer choices
- AToxin mediated inhibition of glycine release
- BMutation causing survival motor neuron deficiency
- CImmune mediated demyelination of peripheral nerves
- DToxin mediated inhibition of acetylcholine release from presynaptic terminalsCorrect answer
- EAutoantibodies to postsynaptic acetylcholine receptors
- FGuillain-Barré syndrome
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