What Makes You Sick?

Campylobacter are a group of bacteria that infect both humans and animals and are passed via fecal material. (Illustration by Nancy Minnigerode)

Salmonella are a group of bacteria that cause an estimated 1.4 million illnesses and more than 400 deaths annually in the U.S. (Illustration by Nancy Minnigerode)

Shigella are a group of bacteria that cause approximately 14,000 cases of shigellosis, in the U.S. annually, though many more likely go unreported, as symptoms often resolve after a few days. (Illustration by Nancy Minnigerode)

Giardia is a microscopic parasite that lives in the intestine of humans and animals, and spreads via fecal material. (Illustration by Nancy Minnigerode)