Bacteria are often used in food production. Are they ever the whole food product, itself?

I know there are ways to grow %26amp; harvest pure bacterial spores, which could doubtless be activated temporarily enough to be living bacteria, so that you can have a pile of living bacteria without necessarily having to have them "in" anything for them to eat. I also know that living bacteria (bacteria that are living when you eat them) are present in and added to yogurt and certain other foods on purpose, but bacteria -added- to other substances is not what I'm talking about. Whether active or dormant, is bacteria ever used as a food in and of itself?





The concept seems gross, but if it can be viable, it would be an interesting concept for an "emergency foodsource" because one thing we'll -always- be able to grow, even when crops and livestock fail - will be bacteria.

Bacteria are often used in food production. Are they ever the whole food product, itself?
Probably not unless it was perfected enough but unless you count fungus like mushrooms and some types of molds probably not unless the plant or animal turned into a bacteria over time as well.

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