a method for the prevention and treatment of fungal infections and , therefore , consequent invasive mycosis in mammalian and avian species is described . the invention comprises a combination of β - 1 , 3 - endoglucanohydrolase , β - 1 , 3glucan , diatornaceous earth , mineral clay , and glucomannan , which is fed to or consumed by mammalian or avian species in amounts sufficient to inhibit enteric fungal colonization in the gut and consequent mycosis . the invention described may be admixed with feeds or foods , incorporated into pelleted feeds or foods or administered orally to mammalian and avian species .