An outbreak of Salmonella infections linked to ground beef has been reported in Illinois, with 26 cases confirmed, and patients reported in other states. The source of the contaminated meat has not yet been identified, and consumers are urged to cook ground beef to 160 degrees F to prevent infection. The symptoms of Salmonella infection include diarrhea, abdominal cramps, and fever, and can range from mild to severe, especially in vulnerable populations like infants, children, seniors, and those with weakened immune systems.