So what is this “yeast” thing anyway? Yes that stuff that is used to make bread and beer. It is actually a living cell, a single celled organism actually. Yeasts are actually a type of very small fungus. The type used in bread and beer and wine has a genus and species name, namely saccharomyces cerevisiae. The breakdown of sugars into carbon dioxide and ethanol (for our bread and beer) is part of its natural metabolism. Of course, we have learned to grow it in other media, which allows us to purify it and put in into packets that you can pick up to bake bread of make beer.
Now just to worn you, other fungi can cause problems. Saccharomyces cerevisiae probably won’t infect you like other fungus/mold could.
Having problems with yeast? Cures for a yeast infection
If you like what you have learned, I could also use a small bit of thanks.