Wow, alot of unneccessary alert going on here. FWIW
ALL BEER IS INFECTED, most of it with one or more fungus of the Saccharomyces
GENUS (Yeast). Other beers(Lambics, Flanders, etc) happen to be infected also by wild yeast(s) (Actually bacterium) such as those of the Brettanomyces and Lactobacillus
GENUS.
Just like the Saccharomyces
GENUS, the Brettanomyces and Lactobacillus
GENUS have strains that may contribute to undesireable traits in certain styles of beer.
Due to the PH level of beer, nothing that is harmful to humans can live in beer.
Keep on brewing my friends