CRE symptoms vary and are contingent on the specific site of infection. Depending upon the organ that is infected, the host may show a variety of symptoms, but some of the most common symptoms that appear regardless of the organ affected are pneumonia, high fever, sepsis, and septic shock. Although these symptoms are a warning sign to visit a doctor, there is still the possibility that you are suffering from the strain that is not resistant to antibiotics and can be easily treated. However, it is still important to see a doctor as soon as these symptoms arise to determine the cause and proper course of treatment.