Francisella is a genus of bacteria known for its role in causing tularemia, a serious infectious disease. These bacteria are typically found in wild animals, especially rabbits and rodents, and can be transmitted to humans through bites, handling infected animals, or exposure to contaminated water or soil. The most well-known species, Francisella tularensis, is highly infectious and can lead to severe illness if not treated promptly. Symptoms of tularemia can include fever, skin ulcers, and swollen lymph nodes. Proper precautions, such as wearing gloves when handling animals, can help prevent infection.