Abstract
Summary
1. Normal and syphilitic rabbit testes, liver, heart and kidneys were assayed for α-ketoglutaric oxidase, pyruvic oxidase, fumarase, aconitase, lactic dehydrogenase, TPN isocitric dehydrogenase and succinic dehydrogenase. 2. In syphilitic testes there is a definite decrease in pyruvic oxidase, α-ketoglutaric oxidase, aconitase and TPN isocitric acid dehydrogenase. 3. Both normal and syphilitic heart tissue showed very considerable variations in aconitase activity. 4. In syphilitic kidneys there was a decrease in pyruvic oxidase activity and a moderate decrease in aconitase activity. 5. The decreased enzyme values found in the testes and kidneys of the syphilitic groups are probably a demonstration of a general reaction to the infection.
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