A Rhode Island-based grocery chain is recalling certain Mediterranean olives because they have the potential to be contaminated with Clostridium botulinum. Ocean State Job Lot (OSJL) issued a voluntary recall of Bel Frantoio brand Mediterranean Olives: Calcidica Sweet Monday after the Rhode Island Department of Health (HEALTH) discovered that the product was stored at room temperature when it should have been kept refrigerated, allowing for the potential growth of Clostridium botulinum bacteria. The bacteria produce botulinum toxins, which attack the nervous system when ingested, a condition called botulism. No illnesses have been associated with consumption of the recalled olives to date, according to a HEALTH press release. The product was sold in 34-ounce plastic containers at OSJL locations in Rhode Island, Massachusetts, Connecticut, New Hampshire, Vermont and Maine. No other Bel Frantoio olives are affected by this recall. Consumers who purchased the recalled olives should return them to OSJL for a full refund.