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Updated: Aug 16, 2026

Biochemical Measurement of Neonatal Hypoxia
Published on: August 24, 2011
Severe methemoglobinemia due to food intoxication in infants
Anne-Joëlle Bosset Murone1, Pascal Stucki, Mark G Roback
1Department of Pediatrics, Centre Hospitalier Universitaire, Lausanne, Switzerland.
Abstract:
The purpose of this case report is to illustrate food intoxication in infants as a consequence of fennel ingestion. Four cases of methemoglobinemia (MetHb) are presented here. Each patient ate homemade fennel purée a few hours prior to arriving to the emergency department with cyanosis unresponsive to oxygen, in the absence of suspected cyanotic heart disease. All 4 patients received treatment with methylene blue and fully recovered. Our cases emphasize that improper handling and storing of vegetables can lead to life-threatening MetHb.
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