The hot-cold phenomenon is seen due to which toxin-
Beta hemolysin: is a sphingomyelinase hemolytic for sheep Blood cells but not for human or rabbit blood cells . It exhibits hot cold phenomenon the hemolysis being at 37degC but becoming evident only after chilling Ref: Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no 202
Alpha lysin
Beta lysin
Gamma lysin
Theta lysin
general microbiology