Outbreak of Haff Disease along the Yangtze River, Anhui Province, China, 2016

Haff disease is an unexplained rhabdomyolysis that occurs within 24 hours after consumption of certain types of freshwater or saltwater fish.  There was a  large outbreak of Haff disease that occurred along the Yangtze River in Anhui Province, China, in 2016. Of the 672 cases identified during the outbreak, patients experienced myalgia (100%) and muscle weakness (54.7%). Eating crayfish was the only common exposure among all cases; 96.8% (240/248) of implicated crayfish were caught on the shores of the Yangtze River or its connected ditches. CDC Emerging Infectgious Diseases

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