Newcastle University (Australia) CFS research in the late 1990s found that many cases of chronic sinus infection in us are actually being caused by Staphylococci in the nose. Thou 25% of normal people also get Staph in the nose, it was fund thou that we tended to have the kinds which produce toxins (this can cause also IBS and CFS symptoms). A couple of others CFS specialists in Australia also studied this..
Due to that I had nasal swabs done and yes a lab did find a had Staphylococci in my nose. I never thou got another nasal swab for more advanced testing to find out if it was an actual toxin producing kind or not (due to cost, Staph varieties not covered by medicare test only the basic nasal swab test was covered). So then just had tests done to find out what antibiotic to treat it with.. the one I had was immune to two thirds of the antibiotics it was tested with. I also took with olive leaf extract when I took an antibotic it didnt have resistance too, as doctor had told me it can still be hard to kill.. I only occassionally get sinus like symptoms nowdays... Ive no idea if I got the staph back or not (but a test at a later date a year or so later showed i was stil clear of it in my nose).
I dont feel enough energy to go looking for the actual study link but there is something on "toxin producing strains" of staph causing sinus issues in ME/CFS at http://home.vicnet.net.au/~mecfs/general/whiting.html
Tania i think from memory the toxins were from people swallowing the post nasal drip and cause gut infections, i think thats how it went but i could be wrong??