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Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays

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Published on: March 3, 2014

Infant botulism intoxication and autonomic nervous system dysfunction.

Hugues Patural¹, Philippe Goffaux, Caroline Paricio

¹Paediatric Department, Intensive care and Neonatology unit, University Hospital of Saint-Etienne, 42055 Saint-Etienne, Cedex 02, France. hugues.patural@chu-st-etienne.fr

|March 31, 2009

Summary

Severe infantile botulism in infants can cause prolonged autonomic dysfunction, even after physical recovery. Continuous monitoring is crucial post-extubation to prevent complications from altered heart rate variability.

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Area of Science:

Pediatric Neurology
Infectious Diseases
Autonomic Neuroscience

Background:

Infantile botulism is a severe neuroparalytic illness caused by Clostridium botulinum toxins.
Early diagnosis and supportive care, including mechanical ventilation, are critical for infant survival.

Observation:

Three infants with severe infantile botulism (types A and B) presented with areflexive flaccid coma or apnea.
Physical recovery was progressive, but autonomic dysfunction, assessed via heart rate variability (HRV), persisted.
HRV indices (SDNN, RMS-SD, pNN50) showed significant alterations, indicating sympathetic and parasympathetic imbalance.

Findings:

Botulinum neurotoxin (BoNT) exposure led to profound hypotonia and decreased HRV.
Altered HRV parameters persisted for weeks post-extubation, despite apparent clinical improvement.
Close monitoring prevented adverse events like syncope or sudden death related to dysautonomia.

Implications:

Prolonged cardiopulmonary monitoring is essential following apparent recovery from infantile botulism.
Autonomic function assessment using HRV provides objective measures of recovery.
Understanding persistent dysautonomia is key to managing long-term outcomes in affected infants.