Posted 1/9/2019 5:42 PM (GMT -7)
sandyfeet, I do believe it suggests improvement.
My CD57 and c4a results have fluctuated significantly. In summer of '17 my CD57 was 12 and the c4a was very high. In spring of '18, after a little more than a year of antibiotics, the CD57 was 70 and the c4a was within normal range.
I had to stop antibiotics late April of '18 for an unrelated surgery. Last fall many symptoms came roaring back and in November the CD57 was 38 and my Lyme igm was CDC positive, again. As a result, I am back on antibiotics. Was not tested for c4a at that time, but it will be tested again in early February.
When the c4a test has been high, I have noticeable joint pain.
I have not noticed that the highs and lows of each test go up and down together. There have been times when my CD57 is quite low and the c4a is in normal range.