(CNN) California-grown avocados sold in bulk to retail stores in six states by the Henry Avocado Corporation are being recalled due to potential contamination with the bacterium listeria monocytogenes, the company announced on Saturday.

"Henry Avocado is issuing this voluntary recall out of an abundance of caution due to positive test results on environmental samples taken during a routine government inspection at its California packing facility," reads the company's statement. There have been no reported illnesses associated with the recall at this time.

The recalled products included California-grown conventional and organic avocados. They were packed at Henry Avocado Corporation's facility in California and distributed to six states: Arizona, California, Florida, New Hampshire, North Carolina and Wisconsin. Henry Avocado, a family-owned and managed company, started packing in this facility in late January 2019 and every shipment is subject to the recall.

Listeria bacteria is especially concerning in pregnant women because they can cause miscarriage, stillbirth, premature delivery or a life-threatening infection in a newborn. Others at risk for listeria infection are the elderly and individuals with weakened immune systems.

Symptoms of listeriosis include fever, muscle aches, headache, stiff neck, confusion and loss of balance. Patients may experience diarrhea or other gastrointestinal symptoms, as well as convulsions. It can be treated with antibiotics.

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