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Serious but rare complications
Although rare, CSD can cause people to have serious complications. CSD can affect the brain, eyes, heart, or other internal organs. These rare complications, which may require intensive treatment, are more likely to occur in children younger than 5 years and people with weakened immune systems.
Most cats with B. henselae infection show NO signs of illness, but on rare occasions this disease can cause inflammation of the heart -- making cats very sick with labored breathing. B. henselae infection may also develop in the mouth, urinary system, or eyes. Your veterinarian may find that some of your cat's other organs may be inflamed.