(CNN) -- Dan Kruse started to feel weak one day while hanging out with his friends in a park. The next day, the eighth-grader woke up completely jaundiced -- the whites of his eyes were yellow -- and he urinated blood.



Dan Kruse, now 23, had food poisoning from E. coli bacteria as a teenager.



Deeply concerned, his mother took him to the doctor, who told him to go to the hospital immediately.  Doctors determined he had a severe form of food poisoning that made his kidneys shut down in a condition known as hemolytic uremic syndrome, caused by the bacteria E. coli. A priest gave him last rites, and doctors said he would most likely spend the rest of his life on kidney dialysis.  "I didn't go to the bathroom at all for seven to nine days because of my kidneys shutting down," said Kruse, now a Web developer in Philadelphia, Pennsylvania. "I definitely almost died."



But with the help of an experimental treatment involving medicine "like a fine grain sand" that he ate six times a day, Kruse began to improve, and made a full recovery without dialysis.  Food poisoning from strains of E. coli is less common in the United States than salmonella, a bacteria that has caused more than 1,000 infections in a recent outbreak since April, according to the Centers for Disease Control and Prevention. Tomatoes have been implicated in this outbreak, but many other foods, such as raw meat and poultry, can spread salmonella and other kinds of bacteria.



Food borne illnesses result in more than 300,000 hospitalizations in the United States every year, according to the CDC. About 76 million cases of food borne disease occur annually in the United States, the CDC said.



Salmonella and E. coli present themselves in such similar ways that doctors can't tell which is which without testing a stool sample.  Learn more about the differences between salmonella and E. coli »



Both kinds of bacteria can lead to infections involving diarrhea, vomiting, abdominal cramps and sometimes a low-grade fever. In most cases, an infected person will recover within a week without medicine simply by staying hydrated, doctors said.



People who experience voluminous, bloody and persistent diarrhea should seek medical attention, and may need antibiotics, said Dr. Jennifer Christie, gastroenterologist and assistant professor of medicine at Emory University.



When should you go to the hospital?



When you're not able to tolerate fluids, vomiting so much that you can't keep anything down, or have profuse watery diarrhea, said Dr. Iris Reyes, associate professor of emergency medicine at the University of Pennsylvania. A racing heart along with diarrhea and vomiting indicates dehydration, she said.



People with compounding medical problems such as cardiac conditions or diabetes should also seek medical attention, doctors said.



In some cases, especially among small children, the elderly, and people with compromised immune systems, the infection may become more severe and lead to long-term complications.



Salmonella can lead to a condition called Reiter's syndrome that involves joint pain, eye irritation and painful urination. Chronic arthritis may result, regardless of whether a person takes antibiotics.



A common strand of E. coli, often called E. coli 0157, can lead to hemolytic uremic syndrome, which makes bacterial toxins go into the bloodstream and destroy red blood cells. This can result in kidney failure as a result of damaged cells clogging tiny blood vessels, according to MayoClinic.com.



That strain of E. coli is distinct from enterotoxigenic E. coli, which causes traveler's diarrhea. People traveling to developing countries of Latin America, Africa, the Middle East, and Asia are at particular risk for traveler's diarrhea, but it usually resolves in a few days and is rarely life-threatening.



Symptoms of food borne bacterial infections are also similar to those of some viruses, though bloody diarrhea is sometimes a telltale sign of bacteria.



To prevent these infections, medical professionals emphasize the importance of washing your hands after handling raw meat, poultry, and uncooked eggs. You should also wash your hands after using the bathroom, touching pets or coming into
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