Abstract
Dopamine, norepinephrine, serotonin and related metabolites were measured in the brain of meadow voles and mice after infection with Trypanosoma brucei gambiense with the goal of understanding the neurochemical changes accompanying infection with this parasite. Serotonin and 5-HIAA levels both fell by 26%, and HVA levels rose by 56%, in vole brains during infection. Dopamine, DHPG and norepinephrine levels, however, remained unchanged. In mice, serotonin levels dropped by 17 and 23%, respectively, in the pons-medulla and midbrain regions after infection; 5-HIAA and dopamine levels remained unaffected by infection in mice. The possible causes and the significance of these changes are discussed.
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