Serum chemistries of Coturnix coturnix japonica given dietary manganese oxide (Mn3O4).

1. Plasma creatinine and inorganic phosphorus were increased in manganese oxide (Mn3O4)-treated adult male Coturnix quail, but BUN, BUN/creatinine ratio, uric acid, and total calcium were decreased. 2. Serum enzymes (alkaline phosphatase, glutamic oxaloacetic transaminase, glutamic pyruvic transaminase, and lactic dehydrogenase) were elevated in Mn3O4-treated adult male Coturnix quail, but creatine phosphokinase was not affected. 3. Dietary Mn3O4 at 5000 ppm did not produce overt signs of toxicosis.