Should I worry about parasites in my sushi?

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Recently, headlines claimed that Japanese broad tapeworms might be present in some sushi. Now, a study published in BMJ Case Reports details an Anisakis infection in a Portuguese man. The man needed to have the worm surgically removed; he made a full recovery after. But the news may leave a bitter taste in the mouth of sushi lovers everywhere.

Forbes noted that estimating the prevalence of parasites in sushi in the United States is difficult because it's not something recorded by public health officials. The report also mentioned that there is a growing number of Anisakis infections in Japan, but that most parasites in fish can be killed through freezing. However, Forbes noted that food safety guidelines for sushi vary at the state level, so it's unclear w...