Stephen Evan Malawista (April 4, 1934 – September 18, 2013) was an American medical researcher and Professor of medicine within the rheumatology department of Yale University. Malawista is credited as the co-discover of Lyme disease and led the research team which identified the disease. Malawista was born in New York City on April 4, 1934. His mother, Ann Marlowe Straus, was a theatrical producer and the head of the Berkshire Theater Festival. His father, Lawrence Malawista, was a real estate developer.