of his interests in the struggle for survival, and antibiotic activity was a mean. Later he focuses his research on practical applications for his new principle and turns to microbiology and medical science. Working with a strain of Bacillus brevis, he noticed an inhibition on the growth of Staphylococcus aureus when the two were in mixed culture. The inhibition of S. aureus was caused by a metabolite produced by B. brevis. Gause isolated this product and named it Gramicidin S. The antibiotic went into mass production during World War II and saved many lives. For his part in its development, Gause was awarded the Stalin Prize and named director of the Institute for New Antibiotics in Moscow in 1946. As director, Gause helped to design and manufacture many novel antibiotics of which a few had anti-tumor capacities. Due to such abrupt change in scientific interests many biologists failed to unite the evolutionist and the microbiologist in one personality. See also Lotka–Volterra equations References External links Biography Gause, GF. 1934. The struggle for existence. Baltimore: Williams & Wilkins. 163 pp. Gause, GF. 1930. Studies on the ecology of the Orthoptera. Ecology 11 (2): 307-325 1910 births 1986 deaths Academicians of the USSR Academy of Medical Sciences Stalin Prize winners Recipients of the Order of Friendship of Peoples Recipients of the Order of the Red Banner of Labour Soviet biologists Soviet ecologists Soviet inventors Soviet microbiologists Burials at Kuntsevo Cemetery