From a Blue Bell press release:

For the first time in 108 years, Blue Bell announces a product recall.

One of our machines produced a limited amount of frozen snacks with a potential listeria problem.

When this was detected all products produced by this machine were withdrawn.  Our Blue Bell team members recovered all involved products in stores and storage.

This withdrawal in no way includes our half gallons, quarts, pints, cups, three gallon ice cream or the majority of take-home frozen snack novelties.

I guess they forgot about the customers who actually contracted Listeria.

Sales must just be that important.