Institution: | a Department of Microbiology, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216-4505, USA b Division of Infectious Diseases, Department of Medicine, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216-4505, USA c Department of Cellular and Molecular Sciences, St. George's Hospital Medical School, Cranmer Terrace, London SW 17 ORE, UK |