Three Lyme tests were done, and 2 coinfection tests were done.

Fall 2007 - IGeneX positive/CDC negative, but the doctor who ordered the test agreed that my clinical picture fit with Lyme and thus he diagnosed me with Lyme.
Winter 2008 - Quest labs negative (but a few bands were positive).
Summer 2008 - CDC positive (Mayo Clinic labs did the tests, though I was not a patient there at the time)...and the ID doctor who ordered the test blew it off as impossible to be Lyme/must be cross-reacting with something else (with what? he couldn't come up with an answer when I asked)...

All coinfection tests, first from Fry Labs ('08 or '09, I can't remember) & later from IGeneX (2010), were all negative, though I do have clinical diagnosis of Bartonella, and I personally suspect I've had an Anaplasma infection for a long, long time (based on unexplained blood test anomalies, mostly)...

Igenix testing 5 bands on one 6 on the other. CP infection as well as babesia

I ended up in ER with numerous symptoms including stabbing pains in heart area in June 2006.  This following extremely stiff neck in June 2005 and then difficulty using stairs with legs that fall.  Followed up with primary care dr. in June 2006 who ran lyme test and told me everything was negative.  Stupid me never asked for copies of labs.  I tested positive on three bands including band 39.  Went four more years undiagnosed from dr to dr until a woman endocrinologist kept going back to lyme.  I then called original dr.'s office and got original labs which showed the 3 significant bands.  Have never tested positive other than for erlicholisis high titer of 1:320.  Am now awaiting Igenex tests to try and get positive as insurance company is refusing me IV for neuro lyme.  Have MRI with white matter/lesions and neuro symptoms.  Keep your fingers crossed Igenex comes back positive. 

Patti B, mind if I ask what band you test positive on?

I got a clinical diagnosis from a Naturopathic doctor, and then confirmed with with an LLMD. The naturopath ordered tests from Igenix. The test was a while ago, but I remember I had IgM band 41 ++ and Band 39 IND and IgG Band 41 +. Not anywhere near to CDC positive, but my LLMD said if the band 39 had been positive he would have considered it a positive test (because it was a starred band)...or maybe if I'd had another band positive. I can't remember exactly. He had me do a month of antibiotics and re-test, and, of course, it came back even more negative.

Although my test was not positive, I had a really, really strong reaction to treatment. I felt like crap for close to six months after starting antibiotics, but after that a felt a lot of improvement. So I feel comfortable with the clinical diagnosis even though the tests don't confirm it.

I have been sick for five or six years. I don't recall being bitten, but I think it must have been in 2000-2001. I have been very sick since mid 2004. I have had what seems like every test my MD could order, with no luck. My naturopathic physician sent my blood to Igenex late December for the Western Blot, which came back IND for band 39, + for band 41 and IND for band 83-93. She then consulted with a LLMD? (could have been a naturopathic doctor) who gave me a very positive clinical diagnosis of Lyme and Babesia.

I was clinically dxed a several years ago. I didn't test positive(by W. B.) until I had spent a full year on Minocycline.