Dictionary > Parascaris equorum

Parascaris equorum

A parasitic roundworm found in the intestines of equine hosts
Parascaris equorum is a parasitic nematode that infects horses and other equids. It is typically found in the host’s small intestine. The species belongs to the family of Ascarididae, Phylum Nematoda.
P. equorum shows sexual dimorphism. The female adults are larger than the male adults. The females can reach 38 cm in length. Both males and females are yellow-white in color. The eggs have a thick shell and are expelled in feces. Consumption of grass contaminated with P. equorum eggs may lead to the infection of the horse or equid. The eggs that are swallowed release the larvae. The larvae migrate into the small intestine where they will reach maturity. During the larval migratory phase, ascariasis in other body parts may occur. For instance, the larvae may migrate to the lungs and liver and cause inflammation.
No cross infection is reported between equids and humans or other animals.1
Word origin: Greek askarís (“an intestinal worm”)
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Nematoda
  • Class: Secernentea
  • Order: Ascaridida
  • Family: Ascarididae
  • Genus: Parascaris
  • Species: Parascaris equorum

See also:

  • ascarid
  • ascariasis
  • Reference(s):

    1 Briggs, K. (March 1, 2004). “Ascarids: A Growing Problem”. The Horse. Retrieved from ://www.thehorse.com/articles/10920/ascarids-a-growing-problem.

    You will also like...

    Chemical composition of the body
    Chemical Composition of the Body

    The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

    Sugar Homeostasis
    Sugar Homeostasis

    The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

    Community Patterns

    Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

    Crossing Over and Genetic Diversity
    Inheritance and Probability

    Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

    Sigmund Freud and Carl Gustav Jung
    Sigmund Freud and Carl Gustav Jung

    In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

    Salmon jumping upstream in the river
    Lotic Communities & Animals

    A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..