Is Listeria a risk in cut pineapple? Not overly so. One study (Huang, etat, 2018) found that Listeria decreased on cut pineapple when stored at various temperatures. "Under chronic temperature abuse, three different pathogen growth patterns emerged on five test products: both S. enterica and L. monocytogenes grew significantly on cut cantaloupe, honeydew and watermelon at 8 and 12 °C; but only survived on cut radish, and even declined in population on cut pineapple under the same conditions." Another study (Zeigler, etal, 2018) showed similar impact of pineapple on Listeria, but stated that the biggest issue was final product pH, and this can be an issue with a fruit mixture, such as when blended with items like melon or bananas.
https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/scenic-fruit-company-recalls-organic-pineapple-because-possible-health-risk
Scenic Fruit Company Recalls Organic Pineapple Because of Possible Health Risk
Summary
Company Announcement Date: June 22, 2023
FDA Publish Date: June 23, 2023
Product Type: Food & Beverages
Reason for Announcement: Potential to be contaminated with Listeria monocytogenes.
Company Name: Scenic Fruit Company
Brand Name: Cadia and Trader Joe’s
Product Description: Organic Frozen Pineapple and Frozen Fruit Blend Containing Organic Frozen Pineapple
Scenic Fruit Company Recalls Organic Pineapple Because of Possible Health Risk
Summary
Company Announcement Date: June 22, 2023
FDA Publish Date: June 23, 2023
Product Type: Food & Beverages
Reason for Announcement: Potential to be contaminated with Listeria monocytogenes.
Company Name: Scenic Fruit Company
Brand Name: Cadia and Trader Joe’s
Product Description: Organic Frozen Pineapple and Frozen Fruit Blend Containing Organic Frozen Pineapple