This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Staphylococci, Subject name: Microbiology
Which of the following organisms causes fastest food poisoning: 
Select and explain. 
A. Staph. Aureus, B. Clostridium Perfringins, C. Bacillus Cereus, D. Vibrio cholerae
A: Staph. Aureus
Answer: A: Staph. Aureus 
Explanation: Ans. (a) Staph. AureusRef.: Harriosti 18th ed. / 128y Microbiology by Ananthanarayan and Paniker 8th ed. /198Bacterial Food PoisoningIncubation period, organismSymptomsCommon sources1-6 H Staphylococcus aureusNausea, vomiting, diarrheaHam, poultry, potato or egg salad, mayonnaise, cream pastriesBacillus cereusNausea, vomiting, diarrheaFried rice8-16 H Clostridium perfringensAbdominal cramps, diarrhea (vomiting rare)Beef, poultry, legumes, graviesB. cereusAbdominal cramps, diarrhea (Vomiting rare)Meats, vegetables, dried beans, cereals>16 H Vibrio choleraeWatery diarrheaShellfishEnterotoxigenic Escherichia coliWatery diarrheaSalads, cheese, meats, waterEnterohemor- rhagic E. coliBloody diarrheaGround beef, roast beef, salami, raw milk, raw vegetables, apple juiceSalmonella spp.Inflammatory diarrheaBeef, poultry, eggs, dairy productsCampylobacter jejuniInflammatory diarrheaPoultry, raw milkShigella spp.DysenteryPotato or egg salad, lettuce, raw vegetablesVibrio parahaemolyticusDysenteryMollusks, crustaceans