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Related Experiment Videos

Transient tonic pupils in botulism type B

S Monaco1, N Freddi, E Francavilla

  • 1Department of Neurological and Psychiatric Sciences, University of Padua, Italy.

Journal of the Neurological Sciences
|April 29, 1998
PubMed
Summary

A woman developed eye muscle paralysis and dry mouth due to botulism. Prompt treatment with antitoxin and pilocarpine led to full recovery within five weeks.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Toxicology

Background:

  • Botulism is a rare but serious paralytic illness caused by toxins produced by Clostridium botulinum bacteria.
  • Ocular manifestations, such as pupillary abnormalities and difficulties with accommodation, can be early signs of botulism.

Observation:

  • A 29-year-old woman presented with unilateral mydriasis and cycloplegia, progressing to bilateral involvement, accompanied by dry mouth and dysphagia.
  • Neurological examination revealed normal ocular motility and no signs of generalized neuromuscular involvement; standard electrophysiological tests were unremarkable.

Findings:

  • Botulism type B toxin was identified in the patient's stool, confirming the diagnosis.
  • The patient showed a characteristic response to pilocarpine, with pupillary constriction, indicating cholinergic denervation.

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Implications:

  • This case highlights the importance of considering botulism in patients presenting with acute, bilateral ophthalmoplegia and autonomic dysfunction, even without typical neuromuscular symptoms.
  • Early diagnosis and administration of botulinum antitoxin are crucial for favorable outcomes, as demonstrated by the patient's complete recovery.