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Disease. Heterophyiasis

Geographic distribution. Asia-Pacific countries: Philippines, Hawaii, Japan, Thailand and Korea.

Life cycle. The first intermediate hosts are brackish water snails such as Stenomelania newcombi or Thiara granifera; the second intermediate host is the mullet.

Morphology. The adult worm is small, pyriform or ovoid in shape and 0.4-0.7 by 0.3-0.4 mm in size. It is characterized by the position of ventral sucker, which is slightly deviated to the right side of the body, and the presence of an elongated sac-like seminal vesicle on the opposite side of the ventral sucker. Intrauterine egg is yellowish in color, oval, and a little elongated in shape with slightly attenuated anterior end, and 25-29 by 11-13 mm in size.

Pathology and clinical symptoms. Refer to Metagonimus Species.

Diagnosis. Refer to Metagonimus Species.

Prevention. Refer to Metagonimus Species.

Treatment. Refer to Metagonimus Species.

Metacercaria of Stellantchasmus falcatus from a mullet.

Stellantchasmus falctus collected from a naturally infected man.

Stellantchasmus falcatus collected from a cat.

S. falcatus collected from a cat. Semichon's acetocarmine stained.