In lab we did an experiment of finding out what bacteria are in the environment around us. We did this by swabbing our environment and then inoculating a plate of TSA (Trypticase soy agar) a non-selective or differential media. For my environmental swabs I chose my water bottle mouth piece and my dogs mouth. I swabbed both with seperate swabs and inoculated two different plates. The results were kind of gross. Both plates were lawns, which means there was so much bacterial growth over the 5 day long incubation that there wasn’t a single isolated colony. It was a little surprising that my water bottle had so much bacteria on it, but now that I think about it it makes a lot of sense. Your mouth has countless different types of bacteria in it so it would make sense that anything you put your mouth on has countless different types of bacteria in it. And my for my dog’s mouth, well he’s a dog. I was expecting that to be super gross. I wish that we had other plates to select or promote certain bacterial growth just to see the diversity of bacteria that is growing everywhere in the world around us. Some girl did a soda gun at work and came back with similar results to my plates. That seems really gross. At least with my bottle it is the bacteria that belongs to me and is always living inside of my mouth. I would prefer not to drink the bacteria of people serving me soda.
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