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Published: Wednesday, 10/19/2011

FDA says old equipment, improper cleaning at Colorado farm may be to blame for cantaloupe illness

BY MARY CLARE JALONICK
ASSOCIATED PRESS

WASHINGTON — Pools of water on the floor and old, hard-to-clean equipment at a Colorado farm's cantaloupe packing facility were probably to blame for the deadliest outbreak of foodborne illness in 25 years, the Food and Drug Administration said Wednesday.

Government investigators found positive samples of listeria bacteria on equipment in the Jensen Farms packing facility and on fruit that had been held there.

In a six-page assessment of the conditions at the farm based on investigators' visits in late September, the FDA said Jensen Farms had recently purchased used equipment that was corroded, dirty and hard to clean. The packing facility floors were also constructed so they were hard to clean, so pools of water potentially harboring the bacteria formed close to the packing equipment.

The equipment — purchased in July, the same month the outbreak started — was previously used for a different agricultural commodity, the agency said, and the listeria "could have been introduced as a result of past use of the equipment," according to the report.

The agency said the contamination likely happened in the packing house, but the way the cantaloupes were cooled after coming off the fields may have also contributed to listeria growth. The farm did not use a process called "pre-cooling" that is designed to remove some condensation, which creates moist conditions on the cantaloupe rind that are ideal for listeria bacteria growth. Listeria grows in cool conditions, unlike most pathogens.

FDA said that samples of cantaloupes in Jensen Farms' fields were negative for listeria, but bacteria coming off the field may have initially introduced the pathogen into the packing house, where it then spread. Listeria contamination often comes from animal feces or decaying vegetation.

Another possible source of contamination was a truck that frequently hauled cantaloupe to a cattle operation and was parked near the packing house. Contamination could have been tracked into the house by people or equipment, the report said.

The Centers for Disease Control and Prevention says 123 people have been sickened in the outbreak, including the 25 who died. It is the deadliest known outbreak of foodborne illness in the U.S. in more than 25 years.

The tainted fruit, which Jensen Farms recalled in mid-September, should be off store shelves by now. But the number of illnesses may continue to grow, as the symptoms of listeria can take up to two months to appear.

The CDC on Tuesday confirmed a sixth death in Colorado and a second in New York. Indiana, Kansas, Louisiana, Maryland, Missouri, Nebraska, New Mexico, Oklahoma, Texas and Wyoming have also reported deaths.



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