Staphylococcus aureus is a common cause for skin infections, respiratory infections, and food poisoning.

Microbial Group: 
Bacterium

For Rocky Mountain Spotted Fever (RMSF), the overall mortality rate is 4%, despite effective antibiotic therapy (Medscape)

Microbial Group: 
Bacterium

Legionnaires disease has a 25% mortality rate (Medscape)

Microbial Group: 
Bacterium

Symptoms of an infection are: watery diarrhea with possible blood cells, abdominal pain, fever, nausea and vomiting, inflamed digestive tract, and general weakness. Most cases of campylobacter infections do not show symptoms, however, complications can occur, like a urinary tract infection or an abortion.

Microbial Group: 
Bacterium

Aeromonas hydrophila can cause diarrhea, kidney disease, wound infections, pneumonia, and urinary tract infections. 

Microbial Group: 
Bacterium

Cyanobacteria can produce toxins called cyanotoxins, this comes from the blooms that form. Health effects associated with exposure to cyanobacteria are: stomach and intestinal illness, breathing problems, allergic reactions, skin irritation, liver damage, and neurotoxic reactions.

Microbial Group: 
Bacterium

Listeria monocytogenes is a bacterium that can cause the disease listeriosis. It is a series disease, especially for pregnant women, people with a weakened immune system, and adults over the age of 65. It causes a variety of symptoms depending on the location the bacterium is affecting. Basic symptoms include fever and diarrhea. However, if the bacteria travels further than the gut, the symptoms depend on if the person is pregnant. If it is a woman who is pregnant, symptoms are usually flu like, however, the infection may lead to miscarriages or life-threatening infections to the newborn. If the people are not pregnant, symptoms can include headaches, stick neck, loss of balance, and convulsions.

Microbial Group: 
Bacterium

This bacterium infects multiple types of hosts including herbivorous mammals such as livestock and is considered zoonotic however humans are a dead end host and do not become infectious.

Microbial Group: 
Bacterium