Eggs can contain a type of bacterium called salmonella known to cause illness in people. Symptoms of salmonella infection include fever, diarrhea and abdominal cramps. Most cases do not require treatment with antibiotics. To reduce your risk of a salmonella infection, store eggs in the refrigerator to prevent salmonella bacteria from growing. Cook eggs thoroughly so that both the whites and yolks are firm, and consume them promptly.