Tularemia is an infectious disease that is caused by the bacterium Francisella tularensis. The disease is also called rabbit fever, deer fly fever, and tick fever. There are various synonyms for tularemia that have been used over the years, including Francis disease, ulceroglandular tularemia, typhoidal tularemia, and pneumonic tularemia. These synonyms reflect the different forms of the disease, which can affect different parts of the body and cause different symptoms. While tularemia is a rare disease, it can be very serious if left untreated. Therefore, it is important to seek medical attention if you are experiencing symptoms that resemble tularemia.