Salad is supposed to be good for you – so what’s behind all the cases of lettuce poisoning?

Iceberg lettuce has been blamed for a surge in American cases of the parasitic illness cyclosporiasis. Symptoms include ‘frequent and sometimes explosive bowel movements’

Name: Salad.

Age: Legend has it that in the Byzantine period, the Greek island of Kos was a centre for growing a long-leafed variety of lettuce that your grandparents might know as cos, though that variety is now more commonly referred to as romaine.