Linked from
The 13 pages that link to Bacterium, each with the reason it gives.
PrionCompared with: Prions are protein particles, not cells capable of independent metabolism.
FungiCompared with: Fungi have eukaryotic cells, unlike bacteria.
DiphtheriaNarrower topic: Diphtheria is caused by bacteria rather than viruses or parasites.
ChlamydiotaNarrower topic: Chlamydiota belongs to this broad domain of cellular life.