If you’ve ever read the back of a probiotic supplement pack, you’ve probably seen long, complicated names like Lactobacillus bulgaricus, Streptococcus thermophilus, or Bifidobacterium longum. Sometimes there’s even a strange number next to them — something like NBIMCC 8244 or DSM 17938. Those codes may look like random lab jargon, but they’re actually the hidden passports of microbes or something like their ID cards. They help scientists know exactly which living strain i