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Thread: cross-contamination?

  1. #1
    Join Date
    Oct 2005
    Posts
    2

    cross-contamination?

    Has anyone heard of a brew being contaminated by fruit flies. I think the yeast was somehow crossed by the flies.My ale tastes like lager. Is this possible?Rookie needs help..Thanks in advance.

  2. #2
    Join Date
    Jun 2003
    Location
    Berlin, Maryland, USA
    Posts
    351
    I've brewed lots of ales that tasted like lagers. Sometimes even on purpose!

    I'd think it's much more likely that your yeast has mutated a little bit...

    Cheers, Tim

  3. #3
    Join Date
    Aug 2005
    Location
    Nashville, TN
    Posts
    258

    Fruit flies

    Quote Originally Posted by rookie
    Has anyone heard of a brew being contaminated by fruit flies. I think the yeast was somehow crossed by the flies.My ale tastes like lager. Is this possible?Rookie needs help..Thanks in advance.

    Fruit flies are aerobic; your beer is anaerobic.
    So, fruit flies don't change the flavor of your beer.
    How do the flies got in your yeast?

    Fred

  4. #4
    Join Date
    Dec 2004
    Location
    Mukilteo, WA
    Posts
    304
    Fruit Flies generally carry an Acetobacter that starts turning the alcohol to vinegar. However, in a closed fermenter and conventional brewing practices, they shouldn't have gotten in there.

    Just like Tim, I've intentionally brewed beers to simulate lager taste profiles.

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