'''Cat scratch disease''' (CSD) is an illness caused by the bacterium ''Bartonella henselae''. Almost half of all [[cat]]s carry the infection at some point. The infection does not make cats sick. However, the scratch or bite of an infected cat can cause symptoms in people, including
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'''Cat scratch disease''' (CSD) is an illness caused by the bacterium ''Bartonella henselae''. Almost half of all [[cat]]s carry the infection at some point. The infection does not make cats sick. However, the scratch or bite of an infected cat can cause symptoms in people, including:
* Swollen [[lymph nodes]], especially around the head, neck and upper limbs
* Swollen [[lymph nodes]], especially around the head, neck and upper limbs