This was sent out as a warning for people who have mold allergies. I cut and pasted from this site.
"It is possible for someone who chows down on pancakes made from a mix that has sat around too long to suffer a potentially fatal anaphylactic reaction to the molds that have grown therein. We know this to be so because it has happened before, and the resultant death was documented.
In 2001, two pathologists practicing in
The cause of his death was determined to be anaphylaxis due to an allergic reaction to molds.
Anaphylaxis is a rapidly developing immunologic reaction that occurs when those who have allergies come in contact with the substances they are allergic to. When it kills, it does so by triggering fatal respiratory or cardiac arrest.
The pancake mix that delivered a toxic payload was analyzed and found to contain four rather nasty molds: Penicillium, Fusarium, Mucor, and Aspergillus. The decedent had not been allergic to eggs (which are a component of pancakes), so there was no doubt as to which allergy had killed him. It had been mold, and nothing but.
There was a death, and it had been due to ancient pancake mix. Or, rather, to an allergic reaction to the mold that had grown in the stale pancake mix.
It needs be kept in mind there is nothing inherently toxic about pancake mix that has passed its freshness date, the product's getting old does not transform it into a poison, nor does the growth of mold within opened boxes of flapjack powder turn it into something that will fell all who ingest it. Only those who have allergies to mold are at risk, and even then, for the pancake mix to pose a hazard it has to contain mold spores, not just be over the hill.
For mold to gain access to a food product, the foodstuff has to be exposed to its spores. Pancake mix cocooned in an unbleached wax paper, plastic, or a foil pouch within its outer packaging wouldn't have this contact and should still be safe no matter how old it gets. However, mix sold unpouched in cardboard boxes or paper sacks would likely be at risk even if the box or sack hadn't previously been opened, because such packaging would not necessarily keep dampness out, and mold thrives in damp environments.
What does all this mean? If you don't have a mold allergy, you needn't fear your pancake mix; if you do have such a sensitivity, you shouldn't keep your flapjack makings around for a few years after opening the box or pouch it came in. It's not worth dying over 50¢ worth of pancake mix, so when in doubt, throw it out."