South African officials say an outbreak of listeriosis has killed 172 people since the start of 2017. It is the world’s largest reported Listeria outbreak.
The National Institute of Communicable Diseases said 915 cases of listeriosis had been confirmed since Jan. 1, 2017. Early last month, only 61 deaths had been confirmed.
It is prevented by basic hygiene and washing food, but South African authorities say the source of the worsening outbreak is still unknown.
The United Nations has said South Africa’s listeriosis outbreak is believed to be the largest-ever worldwide.
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