For a long time identifying bacteria required growing them on different media. If then bacteria didn't grow on the media,, we didn't know what it was. However for most pathogenic bacterium we did figure out how to culture them.
Then molecular biology advanced to a level where we can amplify and sequence a single bacterium's DNA. This has led to a continuous stream of new species discoveries from different environments.
Finding a new pathogenic bacteria for humans is still a rare discovery.
I foster extra spicy kittens and tame them so they can be adopted. Each time one bites me I think about how I have almost no insurance and this could be the one that unalives me. Those puncture bites are amazing. This little predator weighing less than 1% what I do can do me in with just their teeth.
We had four cats die within a year. All orange boys.
Then one day I get a call from a place I'm doing Trap Neuter Release. Some mom just dropped three kids on a porch. I go grab the kids and set a trap for mom. I get the kids home. Three orange girls, two are bobtails. I've been on the hunt for an orange girl for years. Jackpot.
Really hoping we get mom because these are bottle babies. Get mom. Orange girl with even less tail.
I know I'm probably keeping mom no matter how feral she is. Definitely one of the kids too.
Time to make the decision. Which kid to keep. Wife vetoes me. We are keeping them all. Plus two more orange girls that will show up over the year. I have six orange girls. Probably more than anyone on the east coast. So much foster fail. So few braincells.
Eventually tame mom after 12 months and multiple attempts on my life.
So many orange girls.