Unless you eat home cooked food 100% of the time, you're eating the same as everyone else in the country is eating. Trust me, the restaurants don't buy their groceries from market villa, and they don't buy imported pork and chicken. There is only one establishment in the area that, as far as I know, grows most of the produce they use, and that's the Chiva Som.
So, next time you sit down for a bowl of noodles, remember that the pork comes from one of the markets, and if you go to some fancy restaurant in town, the food you're served also comes from one of the markets.
So why bother trying to fight a battle you can't possibly win as long as you live in this country? And if you're still terrified of germs and bacteria on the fruit and veg, simply soak/rinse it in a weak solution of hydrogen peroxide, bottles of which are available at most pharmacies. I personally wouldn't bother though. Instead, I've given my body a chance to build up some resistance. Either my approach has worked, or else the food is not as dirty as we may think because I never get ill from it.
I think we're witnessing a bit of Bacteriophobia or perhaps mysophobia. Maybe even a bit of both.

Don't try to impress me with your manner of dress cos a monkey himself is a monkey no less - cold fact