Bacteria
Bacteria were highly adaptable single-ed lifeforms. They were prokaryotic organisms that lacked a membrane-bound  or membrane-bound organelles.

According to Captain Jonathan Archer, over seventy percent of the organisms on Earth are bacteria. ()

Bacteria could be killed with antibiotics. ()

The Crystalline Entity left no trace of life behind on Melona IV, not even soil bacteria. ()

Dr. Beverly Crusher first assumed that a bacterial infection was responsible for some VISOR malfunctions Geordi La Forge experienced in 2369. She later realized that tampering by solanogen-based lifeforms was responsible as she couldn't find any matching bacterial stem in the medical database. ()

Upon his arrival in a village on Bajor in 2369, Julian Bashir ran a scan for bacteria in the water. ()

The bio-neural gel packs of the  were once infected by Neelix with bacteria from cheese. ()

In late 2372, Dr. Bashir told Odo that an illness that made it difficult for him to hold his shape could be a bacterial infection. ()

Classes and types 
 Anaerobic bacteria
 Gram-positive bacteria
 Bacilli
 Cocci
 Staphylococcus
 Synthococcus novae
 Subatomic bacteria

Bacteriological diseases 
 Bubonic plague
 Cholera
 Food poisoning
 Gastroenteritis
 Rigelian fever
 Typhoid fever

External link 
 

de:Bakterie
Microorganisms