Source of 'worst listeria outbreak' found

South Africa says it has finally traced the source of a listeria outbreak that has killed 180 people in the past year - said to make it the worst in history. The source is a factory operated by Enterprise Foods in Polokwane in Limpopo. More facilities are being tested to see if they contributed to the outbreak which infected almost 1,000 people. The health minister warned cross-contamination of other processed meats could have occurred in shops.

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