عُضيات ممحفظة هامة Important Encapsulated Organisms

All of the organisms you have mentioned are bacteria except Cryptococcus Neoformans.
Cryptococcus Neoformans is a fungs
So what?
it is a very important fungs that causes meningitis in T cell deficient pts, exp AIDs pts, and post-organ transplant pts.

They diagnoze it by a test called india ink test which is positive when you see the large halo due to the thick capsule around the organism.

Eventhough the Cryptococcal Antigen is more sensitive.

So even its capsule protect this organism but it makes us find