To diagnose a cat scratch fever, your doctor might perform a physical exam. However, it is difficult to diagnose the infection by the symptoms alone. For a much more accurate diagnosis, an indirect fluorescent antibody (IFA) blood test may be done to see if the bacteria Bartonella henselae are present in your body. In this test, antibodies that are labeled with dye will attach to existing antibodies of Bartonella and “light up” during the test.
Cat scratch fever is usually not serious and generally doesn’t require treatment. However for severe cases, like people that have problems with their immune system, antibiotics are given for treatment.