Anthrax is a pretty bad one. MRSA which is a strain of staph that is resistant to most antibiotics is an awful one. Many times hospital and nursing home patients can pick this one up as it is transmitted from skin to skin contact. Hand washing is critical. However, if someone does get infected, it poses a challenge to treat and cure this infection.
I would say that one of the most harmful bacteria here in the United States is Escherichia coli. This bacterium is better known simply as E. coli and is a major cause of food poisoning. There are many cases of foods having to be recalled because they have become contaminated with E. coli and have caused sickness and even death in people who ate the contaminated food.
Vibrio - A bacteria that leads to Cholera.
Symptoms of Cholera: diarrhea, cramps in abdomen, waterless, pale skin, low urination, decreasing of blood pressure, fatigue and nausea.
The infection with salmonella leads to typhoid.
Symptoms of typhoid: diarrhea, constipation, continuous fever, weakness, oily taste, skin eruptions, inflammations of bones.
Infection with mycobacterium tuberculosis leads to Tuberculosis.
Symptoms of Tuberculosis: Cough with expectoration of blood, excessive weight loss because of the loss of appetite, fatigue and a persistent low fever.
Whats 5 harmful bacteria
salmonella, shigella, mrsa and many more