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African Health Sciences
Makerere University Medical School
ISSN: 1680-6905
EISSN: 1680-6905
Vol. 14, No. 3, 2014, pp. 769-771
Bioline Code: hs14114
Full paper language: English
Document type: Case Report
Document available free of charge

African Health Sciences, Vol. 14, No. 3, 2014, pp. 769-771

 en Seasonal ataxia: a case report of a disappearing disease
Moyo, Adebiyi Ayoade; Bimbo, Fawale Michael; Adeyoyin, Komolafe Morenikeji; Nnaemeka, Amadi Valentine; Oluwatoyin, Ganiyu & Oladeji, Adeyeye Victor


Introduction: Seasonal ataxia is a clinical syndrome of acute cerebellar ataxia which follows ingestion of roasted larvae of Anaphe venata Butler, an alternative protein source consumed in western Nigeria. It was first reported in the 1950s in western Nigeria when it caused a wave of epidemics. This is the first case report of this condition in the literature since 1993.
Case report: We present the case of a 35 year old woman from western Nigeria who was admitted in October 2012 with acute onset of gait instability and bilateral hand tremors, preceded by several episodes of vomiting. She had ingested a meal containing roasted larvae of the African silkworm, 2 hours before the onset of vomiting.
Conclusion: Seasonal ataxia is an important differential diagnosis of acute cerebellar ataxia among the indigenous ethnic population of western Nigeria. It is non-fatal and treatable, with complete resolution of symptoms usually following thiamine therapy.

Anaphe venata; Nigeria; ataxia; seasonal

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