Here is a direct quote from the CDC site http://www.cdc.gov/foodsafety/clostridium-perfingens.html
"What causes C. perfringens food poisoning?
Although C. perfringens may live normally in the human intestine, illness is caused by eating food contaminated with large numbers of C. perfringens bacteria that produce enough toxin in the intestines to cause illness. C. perfringens spores can survive high temperatures. During cooling and holding of food at temperatures from 54°F-140°F (12°C -- 60°C), the spores germinate and then the bacteria grow. The bacteria grow very rapidly between 109°F-- 117°F (43°C --47°C). If the food is served without reheating to kill the bacteria, live bacteria may be eaten. The bacteria produce a toxin inside the intestine that causes illness."
What else causes food poisoning? Boston Market's Chicken Pot Pie
It hurts so bad, totally not worth it...