Here's why and what tests are typically used:
* CSD is caused by the bacteria Bartonella henselae. This bacteria is common in cats, and most cats with the bacteria show no signs of illness.
* Symptoms of CSD are often nonspecific. Many other conditions can cause similar symptoms like swollen lymph nodes, fever, and fatigue.
* Testing for Bartonella henselae is difficult. Current tests are not very sensitive or specific, meaning they can produce false-positive or false-negative results.
Here's what doctors typically do to diagnose CSD:
* Thorough medical history and physical exam: The doctor will ask about your contact with cats and any potential exposure to scratches or bites. They will also examine your lymph nodes and look for other signs of illness.
* Blood tests: These tests may look for antibodies to Bartonella henselae, but the results are often unreliable, especially early in the infection.
* Biopsy: A small sample of the swollen lymph node can be removed and examined under a microscope. This is the most reliable way to confirm a diagnosis, but it's not always necessary.
* Other tests: Your doctor may also order tests to rule out other possible causes of your symptoms, such as a bacterial infection, viral infection, or autoimmune disease.
Diagnosis is often based on:
* A history of cat exposure
* The characteristic symptoms of CSD
* Exclusion of other possible causes
If you have concerns about CSD, talk to your doctor. They can help you understand your individual risk and recommend the best course of treatment.