--The phrase ‘fermentation seminar’ is slang for having a kegger.
--If you avoid salad bars on campus because you know specifically what the coliform count is for that week.
--If family and friends avoid asking how work/school was today during dinner.
--If you yell at the doctor for prescribing antibiotics to you after diagnosing you with a cold.
--If friends come into the lab retch from the stench, but you don’t notice it.
--If talk about Koch’s postulates and wonder why people giggle.
--If you’ve seriously considered a biohazard tattoo.
OR
--If you have a biohazard tattoo.
--If you’ve wondered what LB broth tastes like.
--If you’ve actually drank LB broth, because you were curious.
--If you follow disease outbreaks with more enthusiasm than your favorite sport.
--If you bet on said disease outbreaks.
--If, when you look into your storage fridge, you find beer right next to plates of salmonella.
--If you think that the inventor of parafilm was more of a genius than Einstein.
--If you’ve ever streaked a plate of Strep with your initials
--If you remember Latin species names easier than your friends’ names.
--If when flaming your loop you’ve thought that you are committing mass genocide—and giggled!
--If you have a personalized lab coat.(Note:Ooo, ooo, I have one of those)
--If you get pissed when someone else uses your lab coat.
--If you can roughly guess the bacteria by the colony morphology.
--If you know what ‘colony morphology means.
--If can self-diagnose food poisoning due to the amount of time between eating and symptoms.
--If you avoid salad bars on campus because you know specifically what the coliform count is for that week.
--If family and friends avoid asking how work/school was today during dinner.
--If you yell at the doctor for prescribing antibiotics to you after diagnosing you with a cold.
--If friends come into the lab retch from the stench, but you don’t notice it.
--If talk about Koch’s postulates and wonder why people giggle.
--If you’ve seriously considered a biohazard tattoo.
OR
--If you have a biohazard tattoo.
--If you’ve wondered what LB broth tastes like.
--If you’ve actually drank LB broth, because you were curious.
--If you follow disease outbreaks with more enthusiasm than your favorite sport.
--If you bet on said disease outbreaks.
--If, when you look into your storage fridge, you find beer right next to plates of salmonella.
--If you think that the inventor of parafilm was more of a genius than Einstein.
--If you’ve ever streaked a plate of Strep with your initials
--If you remember Latin species names easier than your friends’ names.
--If when flaming your loop you’ve thought that you are committing mass genocide—and giggled!
--If you have a personalized lab coat.(Note:Ooo, ooo, I have one of those)
--If you get pissed when someone else uses your lab coat.
--If you can roughly guess the bacteria by the colony morphology.
--If you know what ‘colony morphology means.
--If can self-diagnose food poisoning due to the amount of time between eating and symptoms.
**When you open ordinary bottles using your little finger
**If you catch yourself using sterile technique in the kitchen
**if you start calling the colonies you've plated: "My babies!
( Note: But, they're my babies ,what.! They really are)
**When you start wondering what chocolate agar tastes like…(OMG, this is soooo true for me)
** …And when you’ve tasted chocolate agar (Note: eeeewww!) 
** When you talk to the TV telling the actors in CSI when they've done something incorrectly
** If you’ve thought about writing a murder mystery involving botulism, an autoclave, and possibly an in-house incinerator.
(Credit to Elizabeth Mah for this)
