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Cations in body fluids of Trypanosoma brucei in infected rabbits.

Serum copper, magnesium, zinc, calcium and ionized calcium (Ca++) concentrations were compared in 6 rabbits infected with Trypanosoma brucei brucei and 5 uninfected rabbits. There was a significant depletion of Mg and Zn and a significant increase in Cu from about day 10 of infection to the end. There was no change in plasma total calcium or free diffusible calcium. There was a development of kidney damage as shown clinically by proteinuria and urinary loss of magnesium and zinc, and histologically by the observation of hypercellularity in the glomeruli and tubular degeneration. Our findings thus indicate that trypanosomiasis causes kidney damage which may be responsible for the depletion of the cations seen in the study. Some of the clinical manifestations associated with African trypanosomiasis such as convulsions, anaemia, electrocardiographic changes and splenomegaly may therefore be related to these cation changes.