There are more forms, including the ones found in the mouth, and others. Seems like the 'kind' can be matched with the symptoms though. Rather than saying "Well, it might be syphillis, or trenchmouth rather than Lyme.
/www.britannica.com/science/spirochetelifeguardyourhealth.com/spirochete-spore-like-forms/But like I said, no Dr. with a practice is going to take this kind of time. Matching labs that would take the time with treatment practices are impractical too, labs are already backed way the heck up.
What needs to be 'invented', is a way to run a properly set up smear into a computerized recognition field that can give a instantaneous response.
However once again the right questions have to be asked of it even before the right substance and method is even set up to accept the blood sample. AND, there is always the number of samples that have to be taken to 'catch' all of the invading organisms.
Thus we are back to clinical symptoms.