Dictionary > Diphyllobothrium latum

Diphyllobothrium latum

Definition
noun
Fish tapeworm that infests the intestine of its mamalian (including human) host
Supplement
Diphyllobothrium latum belongs to the genus Diphyllobothrium, which in turn belongs to the class Cestoda (tapeworm). D. latum causes diphyllobothriasis in its human host. Infection in humans is usually by eating uncooked fish. The larval stage is known as sparganum. It occurs in Scandinavia, western Russia, and the Baltics. It is regarded as the longest human tapeworm, reaching about ten to twelve meters long. As a tapeworm, the adult D. latum has three major body parts: the head or scolex, the neck, and the proglottids. The scolex lacks hooks and has slit-like grooves called bothria that run longitudinally. The worm uses bothria to attach to the wall of the intestine. The neck serves as the proliferative region that gives rise to new proglottids. The proglottids contain the reproductive organs (and therefore involved in sexual reproduction). The species is hermaphrodite, which means it carries both sets of sex organs and therefore is capable of self-fertilization.
D. latum is whitish or yellowish in color and is dorso-ventrally flattened. The adult worm in the gut feed through the skin (tegument). They absorb nutrients from food digested in the intestine. They lack oral opening.
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Platyhelminthes
  • Class: Cestoda
  • Subclass: Eucestoda
  • Order: Pseudophyllidea
  • Family: Diphyllobothriidae
  • Genus: Diphyllobothrium
  • Species: D. latum

Common names:

  • broad tapeworm
  • fish tapeworm
  • broad fish tapeworm
  • See also:


    You will also like...

    Biosecurity and Biocontrol
    Biosecurity and Biocontrol

    This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..

    DNA carries genes coding for proteins
    Genetic Information and Protein Synthesis

    Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..

    sponge
    Primitive Animals

    Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

    Homeostasis by water regulation
    Homeostasis of Organism Water Regulation

    Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

    An artistic depiction of Dunkleosteus fish
    Fish

    The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

    Gene Pool and Speciation
    The Gene Pool and Population Genetics

    According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..