Mesostephanus spp

From Dog
Adult M. milvi fluke [1]

Mesostephanus are a parasitic small intestinal cyathocotylid fluke of dogs in northern Africa and south-east Asia.

the life cycle involves paratenic hosts (snails) and an intermediate aquatic host (catfish)[2].

Species which have been reported in dogs include:

  • Mesostephanus appendiculatum
  • Mesostephanus longisaccus[3]
  • Mesostephanus milvi
  • Mesostephanus fajardensis

Most dogs are asymptomatically infected this parasite and are an incidental finding during routine epidemiological surveys[4].

Diagnosis is usually based on coprological identification of eggs.

Treatment would be effective empirically with praziquantel at 5 mg/kg every 4 - 6 weeks.


  1. Bowman, DD et al (2005) Feline clinical parasitology. Iowa State University Press, Iowa. pp:91
  2. el-Assal FM et al (1986) Three Egyptian trematodes of fish-eating mammals of family Cyathocotylidae (Poche, 1926). Z Parasitenkd 72(1):73-78
  3. Chandler AC (1950) Mesostephanus longisaccus, a new cyathocotylid trematode from a dog. J Parasitol 36(1):90
  4. El-Gayar AK (2007) Studies on some trematode parasites of stray dogs in Egypt with a key to the identification of intestinal trematodes of dogs. Vet Parasitol 144(3-4):360-365