Dictionary > Sporozoite

Sporozoite

Definition
noun, plural: sporozoites
A minute, elongated cell that arise from the repeated division of the oocyst during sporogony in certain Apicomplexans
Supplement
Apicomplexa is a phylum comprised of protozoans characterized by having a special organelle called an apical complex, and most of them are single-celled, parasitic, and spore-forming. They are intracellular parasites. Their life cycle is comprised of stages where each has a particular cellular variety. Nevertheless, not all members have all the various life stages.
For instance, the life cycle of Plasmodium species, the causative agents of malaria in humans, is comprised of human and mosquito stages. In mosquito stage, the gametocytes ingested by a mosquito during a blood meal from a human host develop into microgametes and macrogametes. The microgamete enters the macrogamete, forming an ookinete. The ookinete is the fertilized zygote that glides its way through the epithelial cells lining the midgut of mosquitoes. It transforms into a thick-walled structure called oocyst. The oocyst undergoes repeated divisions (sporogony) and ruptures to release the sporozoites. The sporozoites move to the salivary glands of the mosquito host. The sporozoite stage is the infective stage in human hosts. When the mosquito takes a blood meal it injects soporozites into the human host. Within the human host, the sporozoites move to invade liver cells (exo-erythrocytic cycle). In liver cells, they give rise to merozoites that infect the red blood cells and initiate clinical malaria.
Word origin: sporo– (“spore”) + zoon (“animal”)
Synonym(s):

  • germinal rod
  • zoite
  • zygotoblast

See also:

  • Apicomplexa


  • You will also like...

    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..

    Flowers and tiny fruits of the pomegranate plant
    Fruits, Flowers, and Seeds

    This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..

    kinesin motor proteins transporting molecules across microtubules
    Movement of Molecules Across Cell Membranes

    Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

    Human perception in action
    Human Perception – Neurology

    This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

    Disturbance on a still water
    Abiotic Factors – Water Conditions

    A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

    mRNA
    Protein Synthesis

    Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

    Related Articles...

    No related articles found

    See all Related Topics