Abstract: Disclosed is a highly effective macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages using an active component derived from natural products. A culture obtained by culturing microorganisms belonging to the genus Aureobasidium (Aureobasidium sp.) is used as the active component of the macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages. By means of the macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages, macrophage phagocytosis can be activated, and cytokine production in macrophages can be promoted. In particular, a macrophage phagocytosis-activating composition can activate the phagocytosis of cancer cells or cells damaged or destroyed by anticancer drugs.

Abstract: Provided is a therapeutic agent for an influenza virus infectious disease, which utilizes an active ingredient derived from a natural product and has an excellent effect. The therapeutic agent for an influenza virus infectious disease includes, as an active ingredient, a ?-glucan-containing composition obtained from a culture of a microorganism belonging to Aureobasidium sp. The therapeutic agent is capable of preventing an influenza virus infectious disease from becoming serious and is capable of promoting the healing of the influenza virus infectious disease.

Abstract: Disclosed is a highly effective macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages using an active component derived from natural products. A culture obtained by culturing microorganisms belonging to the genus Aureobasidium (Aureobasidium sp.) is used as the active component of the macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages. By means of the macrophage phagocytosis-activating composition and/or composition promoting cytokine production in macrophages, macrophage phagocytosis can be activated, and cytokine production in macrophages can be promoted. In particular, a macrophage phagocytosis-activating composition can activate the phagocytosis of cancer cells or cells damaged or destroyed by anticancer drugs.

Abstract: Provided is a therapeutic agent for an influenza virus infectious disease, which utilizes an active ingredient derived from a natural product and has an excellent effect. The therapeutic agent for an influenza virus infectious disease includes, as an active ingredient, a ?-glucan-containing composition obtained from a culture of a microorganism belonging to Aureobasidium sp. The therapeutic agent is capable of preventing an influenza virus infectious disease from becoming serious and is capable of promoting the healing of the influenza virus infectious disease.