Tuesday, December 6, 2011

SO...WHAT IS IT??? -Identifying our unknown bacteria!

After a semester with our unknown bacteria, we have studied its physical characteristics, how it grows, how it moves, how it reacts in different conditions, and what it uses for energy. All the results of these tests have given us clues as to our mysterious unknown. Using the flow chart provided for us, we were able to FINALLY identify it!

These were the determining characteristics when using the flow chart:
  • Gram positive--narrowing it down to Corynebacterium spp., Bacillus spp., and Lactobacillus spp.
  • Spore-forming--narrowing it down to Bacillus spp.
  • Positive mannitol test--narrowing it down to the species B. megaterium and B. subtilis
  • Positive Voges-Proskauer (VP) test-- Bacillus subtilis!!!!

Now that we know what our bacteria is, we decided to do a little research on Bacillus subtilis. Here are some interesting facts that we found:
  • naturally-occuring
  • widespread
  • used for its natural fungicidal properties to prevent crop disease
  • Used in commercial Japanese and Korean food production
  • Can convert explosives into nitrogen, carbon dioxide, and water
  • Used as an immunostimulatory agent in alternative medicine
References:

1 comment:

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