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Nutritional Studies with the Duck

II. Pyridoxine Deficiency¹

One Figure

Department of Nutrition, Harvard School of Public Health, and Department of Biological Chemistry, Harvard Medical School, Boston, Massachusetts

Severe acute pyridoxine deficiency in young ducklings is characterized by growth failure accompanied by severe anemia. Neither convulsions nor paralysis were observed in these birds. The pyridoxine requirement of young ducklings is similar to that of chicks, approximately 250 µg. per 100 gm. of ration.

Chronic pyridoxine deficiency in older ducklings produced lack of growth, paralysis, convulsions, severe microcytic anemia, and poor feather development.

² Rockefeller Fellow at the Harvard School of Public Health, 1943 to 1945.

Manuscript received 20 July 1945.