Most cat scratches don't lead to cat scratch disease. If you are scratched, the best thing to do is to clean the scratch with soap and water. Get checked by your healthcare provider if you develop a fever, an infection at the site of the scratch, or sore and enlarged lymph nodes 1 to 3 weeks after being scratched. You often will not need to take antibiotic medicine. But your provider may advise it to help reduce swelling in your lymph nodes.

CSD is caused by bacteria called Bartonella henselae that infect cats saliva. These bacteria enter the body through a scratch, bite, or lick by an infected cat. The bacteria are found most often in cats, particularly in kittens. The disease is not passed from person to person.

A cat that is infected with the CSD bacteria does not appear ill. Nearly half of all cats may have the bacteria at some point in their lives. Over time, cats infected with the bacteria rid themselves of the infection. You do not need to put an infected cat to sleep.

Swollen lymph nodes near the site of the scratch are the main symptom. You may also have a low-grade fever. Other possible symptoms include tiredness (fatigue), headache, and loss of appetite. In severe cases, seizures may occur. Typically, a blister, pustule, scab, or bump appears at the site of the scratch 3 to 10 days after the scratch. Lymph nodes often start to swell and become sore within 2 weeks after the cat scratch.

Lymph nodes may remain swollen and painful for more than 2 to 3 months.

It's safe to have a cat as a pet even if you have a weakened immune system. You might have a weakened immune system if you have a long-term (chronic) condition such as HIV or are being treated for cancer. Here are some steps you can take:

• Keep the cat indoors.
• Don't play roughly with the cat so you won't get scratched.
• Treat the cat for any fleas using a product suggested by your veterinarian.
• Get regular checkups and advised vaccines.

If you get a cat, choose an animal at least 1 year old and in good health. Young cats are more likely to carry the bacteria than older cats. The cat should be up to date on its vaccines and free of fleas. You don't need to get the cat tested for cat scratch bacteria. Stay away from stray cats, because you won't know their health history.

Antibiotics are only useful in severe cases of CSD. In all other cases, the infection will go away on its own, without treatment. Talk with your child's healthcare provider for advice on how to ease CSD symptoms. Once your child has recovered from CSD, they will most likely have developed a lifelong immunity to it.

Adult cats are much less likely to have the CSD bacteria than are kittens. Also choose a cat that has been well cared for rather than adopt a stray cat. A stray cat may be more likely to bite or scratch while playing with you and your family.