This workshop is an expanded version of the 1.5 day workshop, and will cover topics including: beer spoilers, testing for bacteria and wild yeast; preparation of media, yeast culturing, and equipment needed for setting up a brewery lab. Students will have a chance to see some of their results during the class. The class will also demonstrate the use of the Invisible Sentinel DNA-based detection method for lactic acid bacteria and Saccharomyces diastaticus. The class will take place in a fully-equipped microbiology teaching lab. Part of the workshop will involve testing in a brewery setting.