The status of tyrothricin as an antibiotic agent for topical application*†‡*Read in part before the Scientific Section of the Proprietary Association of America, New York, N. Y., Dec. 5, 1945.†Johnson & Johnson, New Brunswick, N. J‡The accumulation of much of the data reported herein with respect to the antibacterial and sensitizmg properties of tyrothricin was made possible by a grant from the Johnson & Johnson Research Foundation.