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Effect of ozone exposure on growth, nutritional encephalopathy, and fatty acid composition of cerebellum and lungs in the young chick.

Abstract The effect of ozone exposure on the development of nutritional encephalopathy was evaluated in young chicks receiving diets low in vitamin E and containing a source of linoleic acid. Experiments with .3 and .7 ppm ozone at different ages over different periods of exposure failed to establish any consistent effect on the severity of the disease. Ozone had no clear effect on the liver α-tocopherol content of chicks fed vitamin E-supplemented diets, nor did it affect the fatty acid composition of the cerebellum. However, in all cases ozone increased the concentration of palmitic acid in total lung lipids. Ozone-treated chicks had heavily congested lungs. Chicks exposed to ozone from hatching until 23 days of age grew at a faster rate than controls kept in air. This growth stimulation was not evident when exposure to ozone was begun between 8 and 15 days of age.