<unk>  can be diagnosed by Nagler's reaction, in which the suspect organism is cultured on an egg yolk media plate. One side of the plate contains anti-alpha-toxin, while the other side does not. A streak of suspect organism is placed through both sides. An area of turbidity will form around the side that does not have the anti-alpha-toxin, indicating uninhibited lecithinase activity. In addition, laboratories can diagnose the bacteria by determining the number of bacteria in the feces. Within the 48 hours from when the disease began, if the individual has more than 106 spores of the bacteria per gram of stool, then the illness is diagnosed as<unk>  food poisoning. Other tests/reactions: Catalase: Negative, Spot indole: Negative, Lecithinase: Positive, Lipase: Negative, Litmus Milk: Stormy Fermentation, Reverse CAMP plate: Positive, Gas Liquid Chromatography products: (Acetic, Butyric and Lactic Acids). Typically, the symptoms of<unk>  poisoning are used to diagnose it. However, diagnosis can be made using a stool culture test, in which the feces are tested for toxins produced by the bacteria.
Clostridium perfringens
Bacillus cereus
Clostridium botulinum
Clostridium tetani
Clostridium innocuum
Clostridioides difficile 
Campylobacter upsaliensis
Escherichia coli