Escherichia coli; a type of bacteria commonly found in the lower intestines of humans and other warm-blooded animals

The bacterium that causes tuberculosis; mycobacterium tuberculosis

a common soil bacterium often used as a model organism in biological research

a species of beneficial bacteria often found in dairy products and used as a probiotic

An infectious disease caused by Brucella bacteria that affects both humans and animals, also known as undulant fever or Mediterranean fever; it often causes recurring fever in humans and miscarriages in animals.

Helicobacter pylori, a type of bacterium that can infect the stomach and cause ulcers

Helicobacter pylori; a species of bacteria that inhabits the stomach and can cause ulcers or gastritis

listeria bacillus; any bacteria of the genus Listeria

Gram-positive bacteria that include the pathogen causing diphtheria; widely found on the skin and mucous membranes of humans and animals

anthrax bacterium; Bacillus anthracis

Klebs-Löffler bacillus; the bacterium that causes diphtheria

Clostridium botulinum; an anaerobic bacterium that grows on decaying meat and produces a powerful toxin that causes botulism.

Clostridium botulinum (bacterium that produces the botulinum toxin and causes botulism)

a type of soil-dwelling bacteria that can cause food poisoning

a species of Gram-positive, spore-forming bacteria often abbreviated as C. diff that can cause severe diarrhea and colitis

lactobacillus; any of a group of rod-shaped bacteria that ferment carbohydrates into lactic acid

the bubonic plague bacillus

A type of bacterium that can cause food poisoning, also known as "Bacillus cereus".

legionella bacteria

a genus of bacteria that require blood-derived growth factors; haemophilus bacteria