E. Coli

• Escherichia coli, or E. coli, is a group of bacteria. Many of the bacteria types in this group are completely harmless, though some cause a variety of illnesses in humans. The kind of E. coli that can make humans sick may be found in the gut of the cow and other ruminants but does not make the cow sick. Human symptoms begin within the first four days after being exposed and may last up to 10 days. Common symptoms include urinary tract infections, diarrhea, respiratory illness and pneumonia.
  
  

Salmonella

• Salmonella causes a bacterial infection called salmonellosis. The bacteria reside in the intestines of animals, and are transferred to humans by the animal product coming into contact with the animal's feces. Symptoms begin within the first 72 hours after exposure and include fever, abdominal cramps and diarrhea. Though many people recover within seven days, there is a small risk of the infection spreading through the bloodstream to other parts of the body. This risk is increased in those with a weakened immune system.
  
  

Listeria

• Listeria is a bacteria that causes listeriosis in humans; it is especially dangerous due to its ability to live off its host for years and cause serious complications. It can be carried by an animal that shows no symptoms and passed on through meat and dairy products. Symptoms of listeriosis include muscle aches, stiff neck, balance problems, fever, confusion and even convulsions. They Initial symptoms are usually those you would expect from an abdominal infection, such as cramping and diarrhea. Listeriosis is particularly dangerous to pregnant women and can result in miscarriage, fetal death, or illness or death of a newborn.
  
  

Campylobacter

• Campylobacter causes an intestinal infection called campylobacteriosis. Cows can become infected with campylobacter through their udders and pass the bacteria on in milk. The milk itself may also become contaminated if it comes into contact with manure. Symptoms develop within the first five days after being exposed and include abdominal pain, fever and bloody diarrhea. Campylobacter is especially dangerous for those with a weakened immune system, as it can lead to a rare disorder called Guillain-Barré syndrome, which causes paralysis.
  
  

Brucella

• Brucellosis is an infection caused by the bacteria brucella. It can be transmitted by breathing in the bacteria, injesting it or through a skin wound. Drinking contaminated milk products is the most common way for humans to become infected with brucellosis. Symptoms are similar to the flu and may also include recurring fever, fatigue and joint pain.