Changes

These methods only work with pure cultures of ''Lactobacillus'' (or at least cultures that do not contain an unwanted microbe that can take advantage of the residual sugars in the soured wort, such as yeast). Cultures from grains, [[Mixed_Cultures|mixed cultures]], or cultures from other fermented foods such as those listed on the [[Alternative Bacteria Sources]] wiki page, should be treated as a mixed culture that potentially contains yeast. See [[Mixed_Fermentation#Storing_a_Yeast_Cake_or_Sample|Storing a yeast cake or sample of a mixed culture]].

==Contamination Concerns==