Prolongation of post-tetanic facilitation up to 21 minutes is a unique electrophysiologic feature of infant botulism.
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May support infant botulism diagnosis; single case leaves open broader validation.
The electrophysiologic studies in a case of infant botulism show a variety of abnormalities including tetanic and post‐tetanic facilitation (PTF) of the small single evoked muscle action potential. The enlarged amplitude of the single evoked muscle action potential following a 10‐second tetanic nerve stimulation persisted up to 21 minutes. The prolongation of PTF is a unique feature of botulism.
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Fakadej et al. (1982) studied this question.
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