yeah, if i didn't see that film I would have thought that too ^^
here it is ... you can see it on 04min 43sec ... it's in german, sorry.
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About food ... if you ever had fruitflys, they also come from apples and Bananas you buy ... their larvae and eggs are in the food itself. About the mites, i had some in my food. I bought garlic and there was one part of it brown and dry. I looked at it and because of the mass of mites I saw it moving. Since that day I'm a little careful about food contermination ... . okay joke, I was careful about 2 days or so, then all the washing and cleaning got on my nerves and i did as before ^^ For me mites and such are only disgusting ... that's no problem, but for ants it might be dangerous.
Espacially your bran might be dangerous and it definitely is if you buy a wholefood product. A german institute did researches on it and found a too high contermination of fungal spores.
Bran products wheren't heated up and sterilised (it wouldn't be good if it were, so it's okay) ... and an other instiute from the USA found out, that every person in the world (not only chinese) eat up to 1,5kg of insect proteins with their food ...

Vegetarians of course some more
happy eating ^^