9-yr old daughter smells

I recently went have been noticing a very strong odor from my 9-year old daughter.  It is really noticeable in tight spaces (like my car).  It smells like a mix btwn stinking feet/Body Odor and gas.  I can obviously tell when either one of my kids pass gas, and this is a different odor.

Then a few days ago, I was at Parent/Teacher Conferences when her teacher advised me that she smells of "a bowell movement" regularly, and other classmates were starting to complain and not want to sit near my daughter.

I've asked her if she has been wiping herself thoroughly after using the bathroom, and she says she is.  We are very clean people, that shower daily etc etc.  I have scheduled a Dr. Appointment; but am baffled as this just recently became an issue....and I don't want her embarrassed at school or otherwise.  She's "the smelly kid"  at school!!!   HELP!

[Londres70]

I have actually read alot of info about this on and off over the years.  This sounds like a metabolic issue.  

Basic labs should be done along with a kidney profile and a liver profile.