Now this is really disgusting. Health magazine says that there is a tenth of a gram of feces in every pair of underwear. Really? That means you get E.coli on your hands when you move the clothes from the washer to the dryer.
The washer and dryer should be at 150 degrees to kill bacteria. Most organisms die in the drying cycle. Wash underwear separately and wash whites with bleach. Transfer wet laundry to the dryer quickly and dry for at least 45 minutes (or until load is fully dry). Wash hands after doing laundry. Run a cycle of bleach and water after laundering underwear.
I'll never look at washing underwear the same.