It’s more likely in that instance that the separated cheese came from a botulism infected source. Clostridium botulinum is a obligate anaerobe so it can’t grow in the air we breathe but it can grow in canned food. Can then gets super puffy and if someone doesn’t notice or realize the problem all the toxins go into the food. You can to cook the food at a high temperature for a long time to inactivate it making botulism one of the big food poisoning agents.