I will look in to metametrics but my GI did extensive stool testing and didn't come up with anything. I had to fill many vials at different intervals. Does that sound like what metametrics did?
When I didn't know what else there could be, after 12 months of suffering, I finally took an expensive DNA stool profile test from a company called metametrics. They test for fungus, bacteria, blood, parasites and whatever in that test. 9 weeks later I got the answer what was wrong and finally was able to ask for a treatment for this special problem, and it works. It was worth every cent.
The usual tests doctors do are tests for blood, bacteria cultures which need live bacteria to grow, and to test for parasites under the microscope. For this they need bacteria and fungi that are alive, but most bacteria are dying when they get in contact with air. They also need complete specimen to see, but if there is something wrong higher up in your intestine, everything will be digested and dead.
The metametrix ones are to test for DNA, and therefore dont need live bugs or complete parasites, they can even measure DNA from digested things. They make ratios of your probiotic bacteria and compare that to common bad bacteria. They test for antibiotic resistant bacteria, too.
I cannot remember how many different stool samples I gave,over the course of 15 months, and everything negative, until I made this one, and came out positive for two stupid parasites. I also know of someone else where the GPs had no clue, told her she had IBS, and we talked, I told her about the test. She just wrote me an email that she had klebsiella bacteria, and since she got one special course of antibiotics, she is fine again. The biggest problem with this test is that GPs normally dont accept the outcome. My specialist was trying to convince me that I didnt have parasites at all, until I brought him some worms in a jar.