If cookie dough adulterated with E. coli O157:H7 was so rare, how could consumers have been at fault for the E. coli outbreak linked to Nestles Cookie Dough?

Posted by Fred Pritzker in Food Safety

A logical disconnection (Non sequitur, if you will) is an argument in which its conclusion does not follow from its premises.

In March 2009 there was an E. coli O157:H7 outbreak associated with Nestle Cookie Dough involving 77 confirmed E coli infections in 30 states, including 35 hospitalizations and 10 cases of hemolytic uremic syndrome. I represented several of the survivors from that outbreak.

In a medical journal article published online on December 8, 2011,¹ the authors concluded that raw flour used to make the cookie dough was the “prime suspect” in the outbreak although there was no conclusive evidence that the flour was, in fact, adulterated. The authors concluded:

This is the first reported STEC outbreak associated with consuming ready-to-bake commercial prepackaged cookie dough. Despite instructions to bake brand A cookie dough before eating, case patients consumed the product uncooked. Manufacturers should consider formulating ready-to-bake commercial prepackaged cookie dough to be as safe as a ready-to-eat product. More effective consumer education about the risks of eating unbaked cookie dough is needed. (emphasis added)

Within a few months of the outbreak (by July 1, 2009 according to press reports), FDA investigators were focusing on flour as the source of the E. coli O157:H7. However, officials and food safety pundits stressed how novel it was for an E. coli O157:H7 outbreak to be associated with either raw flour or cookie dough. Evidently it was so novel that most cookie dough producers were not treating their flour to kill off the deadly pathogen (and presumably were not testing for it either).

There appears to be a logical disconnection here. If cookie dough adulterated with E. coli O157:H7 was so rare that even producers did nothing to prevent it, how can it be suggested that consumers (who are known to eat raw cookie dough) are implicitly at fault because they failed to take precautions against the E. coli O157:H7 threat?

I can already hear the response: Everyone knows cookie dough contains raw eggs and everyone knows raw eggs carry Salmonella, so if consumers used common sense and refrained from eating cookie dough to avoid salmonellosis, they could have also avoided E. coli O157:H7 poisoning.

But you know what? Most consumers are not food safety experts. They may not know about the dangers associated with raw cookie dough and certainly could not know it was capable of harboring deadly E. coli O157:H7. They also don’t know that the infective dose of E. coli O157:H7 is so incredibly low (which means that you don’t even have to eat raw cookie dough to become poisoned by it).

I agree that consumers need to take reasonable precautions. But if producers – especially multi-national companies like Nestle – don’t consider a danger or prevent it from occurring, it’s illogical and unfair to blame consumers for not doing so.

Food is a product and therefore subject to product liability law and the requirements of safe product design. Those requirements establish a three-tier safe design process: design out the defect; if you cannot design out the defect, add guards that prevent contact with the danger; and if you cannot design out or guard against the danger, then (and only then) are you allowed to warn users to avoid the danger (and when you do issue warnings, they have to be explicit).

In this case, as in so many others involving unsafe food products, producers don’t design out the dangers; they simply bypass the principles of safe design and jump to innocuous and ill-conceived warnings that do not convey sufficient information to constitute an effective warning (Why? Because if the warnings were truly effective, people would not buy the product).

 1. Karen Neil, et al., A Novel Vehicle for Transmission of Escherichia coli O157:H7 to Humans: Multistate Outbreak of E. coli O157:H7 Infections Associated With Consumption of Ready-to-Bake Commercial Prepackaged Cookie Dough—United States, 2009 , Clin Infect Dis. (2011) doi: 10.1093/cid/cir831. First published online: December 8, 2011.

Tags: E. coli O157, Food Safety Lawyer