Introduction Fasciolosis is a worldwide disease predominantly caused by two parasites of the class Trematoda, genusFasciola, named F.gigantica and F.hepatica. Both parasites are hermaphroditic, have identical life cycles, and induce equivalent clinical manifestations in humans. Fasciolosis is an acute food-borne parasitic zoonosis disease and an emerging public health threat in numerous regions worldwide, including Iran. Humans are secondary hosts and frequently acquire infection by eating watercress or water chestnuts and other freshwater plants, including water lettuce, mint, alfalfa, and parsley. Humans can also get infected by drinking polluted water containing metacercariae. We aspire to contain recent information on the distribution, prevalence, and associated risk factors for Fasciola spp.

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