A baby Toxic Norn infected with macrobacteria after eating the shell
This is a type of bacteria that comes with the Toxic Norn pack, and are visible. They cling to your creatures and jump off if they want a new host!
Macrobacteria in its edible (for Toxic Norns) shell
They are healthy to Toxic Norns, but are usually dangerous to other creatures, as it can give them diseases or fevers.