What kind of probiotics are necessary for the body?

There are nine confirmed probiotics: Lactobacillus casei Shirota (LCS), Lactobacillus rhamnosus LGG, Lactobacillus acidophilus LA7, Lactobacillus acidophilus LA5, Lactobacillus acidophilus DDS, F. B. Leiter BB 12 (Bifidobacterium lactis, BB 12) and G. Bifidobacterium longum BB533.