Oba odgovori su o ljudskim infekcijama a u pitanju je infekcija piva tudjim kvascom (drugacim nego onaj koji se koristi za fermentaciju/proizvod piva).
"Always, always, always clean and sanitize your equipment (this includes your bottles, bottle caps, containers, utensils). At the end of the brewing process, you don't want your yeast to have unwanted competition when it comes to the consumption of your fermentable sugars --- that is, you don't want bacteria and foreign yeast "fermenting" your beer for you."
http://www.mtbrewing.com/2009/03/27/a-minimalists-guide-to-b...