A monotypic genus of trichostrongylid nematodes (subfamily Mecistocirrinae), with the single species, Mecistocirrus digitatus; it is not grossly distinguished from Haemonchus contortus and has about the same effect on the host. Mecistocirrus is distributed chiefly in Asia in cattle, sheep, buffalo, bison, the stomach of pigs, and occasionally in humans.
[G. mēkistos, very long, + L. cirrus, curl, the protruding male organ of a nematode]
a genus of worms in the family Trichostrongylidae.
found in the abomasum of domestic ruminants and buffalo, and in the stomach of pigs. In endemic areas it is an important parasite, causing effects similar to those of Haemonchus spp.