Two Blue Bell employees work on enhancements to the process at one of the company's facilities in this June, 2015 photo.
But don't worry, according to Blue Bell, this is completely normal and the company says it shows that its new "enhanced environmental and product testing procedures are working."
"We have identified locations where suspected Listeria species may be present in our facility, and we continue to extensively clean and sanitize those areas and make additional enhancements to the facility and our procedures based on the environmental test results," the company says in a press release.
Blue Bell says it expects to periodically find microbiological indications at its facilities, and is testing every batch of ice cream produced, none of which have tested positive for Listeria.
"Because Listeria is commonly found in the natural environment, no manufacturer can ever assume it can be entirely eradicated," the company says. "We have worked closely with our expert team of microbiologists to develop an enhanced, robust testing system specifically designed for each facility to identify any possible presence of Listeria in the production environment, including extensive environmental testing and testing every single batch of ice cream we make before it is sold to customers."