(CNN) After a series of recalls, an investigation into safety issues at US ice cream makers forced one manufacturer to cease operations and resulted in three voluntary recalls, the US Food and Drug Administration said Wednesday.

The FDA said that it inspected and obtained samples from 89 ice cream production facilities in 32 states in 2016 and 2017, detecting listeria monocytogenes, which can cause listeriosis , at 19 facilities and one instance of salmonella.

in the prior three-year period and an outbreak of listeriosis linked to an ice cream maker in 2015 that The investigation was launched in August 2016 after 16 recalls of ice cream productsin the prior three-year period and an outbreak of listeriosis linked to an ice cream maker in 2015 that involved three deaths

"Although many of these facilities were adhering to good manufacturing practices, we did find that some were in violation of the law," said Frank Yiannas, FDA deputy commissioner for food policy and response.

"These results serve as an important reminder to all food facilities distributing products in the US of the importance of complying with rules set forth to mitigate safety issues."

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