Skip to Content


Pronunciation: me-sis'to-sir'us

Definition: 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. mekistos, very long, + L. cirrus, curl, the protruding male organ of a nematode]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.