joe ate at a chinese restaurant on friday night at 8 p.m. he ate fried rice, orange chicken and salad. he awoke at 12 a.m. vomiting and had abdominal cramps. he had no fever and no diarrhea. this continued for about 6 hours and then he felt better. a fecal sample would have revealed the presence of gram positive aerobic endospore forming bacilli. what is the most likely cause of his illness and which food was most likely to have been contaminated?