Microbiology When infection is caused by all of these agents symptoms of food poisoning occurs in 6-7 hours, EXCEPT: A Staphylococcus B E. coli C Clostridium D Bacillus cereus 💡 Explanation When infection is caused by all of these agents symptoms of food poisoning occurs in 6-7 hours, EXCEPT: ✓ Correct Answer: B. E. coli