报-美国人2023Science Quickly, from SCIENTIFIC AMERICAN 2023
Lyme disease is primarily caused by a bacterium called Borrelia burgdorferi, which is transmitted by the bite of the blacklegged tick—more commonly known as the deer tick.
If a particular infection seems like an obvious cause, then a test for that might be used, like the Western blot for Borrelia burgdorferi bacteria, or a thin blood smear for malaria.