Each received positive results back. Each diagnosed me with Lyme. The tests these doctors ordered were much better than the test my original doctors did. And each of these new, better doctors, did several tests and sent them to multiple labs. This process is used because these tests aren't accurate.
False negatives are very common.
Fortunately, although possible, false positives are much less common. And to further validate that Lyme was the culprit, one of my doctors, with my encouragement, was busy eliminating, through scores of tests, all other possibilities. I really do not know when I was bitten. It's probable, however, that it dates to summer '93. The first symptoms are flu-like.