Sanitizing fridge and freezer after days of no power Coming back from 10-day vacation, we found that our fridge was off the whole time. Fruit and packaged ham in the fridge, veggies fruit and meat in the freezer. Oops.

Obviously everything has thawed and became really smelly. Even tbough the meat was in bags, some of the "juice" may have still leaked. There was quite some liquid in the freezer drawers, though most of it probably from fruit/veggie.

What nasty things could have grown in there? How do I clean up this mess without throwing away the fridge?

We've already applied both the steam cleaner and boiling hot water (the latter only to plastic drawers and glass shelves). What else should we do? What chemicals?

I'm concerned that something may have gotten into all the platics or air circulation. In case it matters, the fridge is a 2-year fairly expensive bosch - probably not the most vulnerable thing, but not all glass and stainless steel either.
you don't have to throw out the fridge, you just need to clean it. Forget steam and boiling water, just get a bottle of spray surface cleaner and a bunch of rags, or a tub of soapy water (use dishwashing liquid). Take out the shelves and drawers and clean them separately, then clean the inside thoroughly with your spray cleaner and/or soap. If you've used soap then rinse with clean water and let it dry. Air it out for a few hours. 

There's nothing you can do about the air circulation, but you probably don't have to. It's not as if you actually put food in there, the worst that could happen are maybe some mold/fungus spores and they won't like the dry and cold environment of the fridge. You may have some residual smells in the air ducts, those should work themselves out fairly quickly, a plate of baking soda will help absorb these although there are purpose made fridge deodorizers which are better.