Dough-maker Aspen Hills has issued a recall for the cookie dough that it sold to numerous food companies like Blue Bell Creameries because the product might be contaminated with listeria monocytogenes bacteria.

The Iowa-based company notified customers about the recall, but it was not immediately clear whether the problematic product reached any consumers because the company does not sell directly to consumers. The names of the companies or states where the product was sold were also not immediately revealed.

Jon Austin, a spokesperson for Aspen Hills, said that the company recalled the cookie dough because it found lapses in its food safety system, such as failure to wear proper uniforms, which could have allowed the dough to become contaminated.

In a newly released statement, Austin said, “Any one of these issues is a matter we would take seriously, but collectively they represent to us an unacceptable lapse in the standards our customers — and we — expect.”

Last month, ice cream-maker Blue Bell recalled some of its products from the markets after it found that the raw material supplied by Aspen Hills tested positive for listeria contamination.

The bacterium in question causes a serious infection called listeriosis, which is characterized by fever, muscle aches, nausea and diarrhea. The illness primarily affects newborns, older adults, pregnant women, and others with weakened immune systems.