Consumers have been warned not to eat a batch of Ambrosia packet custard, which may carry potentially fatal botulism bacteria, following a recall of the product from Oliver's Delicatessen yesterday. The manufacturer, Unilever Bestfoods in Britain, recalled the product following the detection of the bacteria Clostridium butyricum in certain batches. The 500-gram packs carry the item code 2750 and lot number Q1 and were sold at Oliver's. City Super imported other batches of the brand and has voluntarily withdrawn all stocks to avoid confusion. A Food and Environmental Hygiene Department spokesman said victims of botulism could suffer abdominal pain, nausea, blurred or double vision and muscle weakness. Infants could suffer constipation, lethargy and general weakness. The disease can be fatal, particularly in infants. For health advice, consumers can call the department's special hotline on 2867 5438 from 8am to 6pm until tomorrow. For product inquiries, call the 24-hour hotlines at Oliver's on 2299 3828 or City Super on 2506 2888.