Tularemia is caused by the bacterium Francisella tularensis.
Humans can get the disease through:
A bite from an infected tick, horsefly, or mosquito
Breathing in infected dirt or plant material
Direct contact, through a break in the skin, with an infected animal or its dead body (most often a rabbit, muskrat, beaver, or squirrel)
Eating infected meat (rare)
The disorder most commonly occurs in North America and parts of Europe and Asia. In the US, this disease is found more often in Missouri, South Dakota, Oklahoma and Arkansas. Although outbreaks can occur in the United States, they are rare.
Some people may develop pneumonia after breathing in infected dirt or plant material. This is known to occur on Martha's Vineyard, where bacteria are present in rabbits, raccoons, and skunks.
Symptoms develop 3 to 5 days after exposure. The illness usually starts suddenly. It may continue for several weeks after symptoms begin.
Eye irritation ( conjunctivitis -- if the infection began in the eye)
Red spot on the skin, growing to become a sore (ulcer)
Call your health care provider if symptoms develop after a rodent bite, tick bite, or exposure to the flesh of a wild animal.
Preventative measures include skinning or dressing wild animals with gloves and avoiding sick or dead animals.
Penn RL. Francisella tularensis (Tularemia). In: Mandell GL, Bennett JE, Dolin R, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Disease. 7th ed. Philadelphia, PA: Saunders Elsevier; 2009:chap 227.
Schaffner W. Tularemia and other Francisella infections. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 319.
Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.