© 1999 by Oxford University Press
Ankle clonus and thiocyanate, linamarin, and inorganic sulphate excretion in school children in communities with konzo, Mozambique
Z Faculdade de Medicina, Universidade Eduardo Mondlane, Maputo, Mozambique ZZ Direcção Provincial de Saúde, Nampula, Mozambique ZZZ Repartição de Nutrição, Ministério de Saúde, Maputo, Mozambique
We examined 397 school children for ankle clonus in five communities in three district affected by konzo, spastic paraparesis associated with cassava consumption. From a subsample of 131 children, we analysed urine specimens for urinary thiocyanate, linamarin, and inorganic sulphate. The proportion of children with clonus varied between sites, ranging from 4 to 22 per cent. Geometric mean thiocyanate, linamarin, and inorganic sulphate concentrations were 163 and 60 µmol/l and 4.4 mmol/l, respectively. Children with ankle clonus had higher urinary thiocyanate concentrations. We recommend prevention to reduce cyanide exposure and further monitoring of cyanide exposure and neurological damage in these communities.