She is currently the Executive Medical Director of the Florida Department of Health - Hillsborough County, and responsible for developing clinical protocols, policies / procedures and supervision of the tuberculosis, HIV and STD clinics. One of her interests is new advances in prevention and treatment of tuberculosis. Dr. Casanas serves as attending for fellows, residents and medical students and is actively engaged in clinical teaching of infectious diseases at various levels within the University of South Florida academic programs at Tampa General Hospital.