Preview

Trichianella Spiralis

Good Essays
Open Document
Open Document
625 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Trichianella Spiralis
Trichianella Spiralis
Tammora Holmes
SCI/163
December 18, 2012
Tejuana Redmond

Trichianella Spiralis

The trichinella spiralis is the smallest known nematode. There are three different types of ecological life cycles of the nematodes. The cycles are called urban, sylvatic, and marine cycles. The trichinella species is found worldwide. They are prevalent in Mexico, the northern hemisphere, parts of South Asia, Africa, South America, and Middle East. In the urban cycle the nematodes are carried by pigs and rats. In the sylvatic cycle they are hosted by walruses, wales, and polar bears.
The male’s nematode is 1.4 mm in length. The female is twice the size of the male. The body of the worm is more slender at the anterior than the posterior. The anterior end of the female contains hatching juveniles. The female is ovo-vivparious. This means that she produces eggs but doesn’t lay them until they have already hatched in the uterus. The nematode is also made up of three layers. The outer layer is called the cuticle layer. The cuticle layer protects the nematode so they can invade in the digestive tracts of animals.
The life cycle of the nematode begins after ingestion of the first from the intermediate host. The worm molts four times within the first thirty hours and then mates. Then they move through the veins into the bloodstream. The larvae grow within the muscles causing a cyst. After a cyst is formed the worm cannot migrate any further. The only way the species can continue the life cycle is to be ingested by another host.
Humans may know this parasite through the disease that is causes. This nematode can cause a serious infection in the human body calls trichinella or trichinosis. The human body can obtain this worm by eating meat that is already infected. The onset of the infection typically occurs within the first 24-48 hours after ingestion. The stage usually takes 4-8 weeks to complete and produces a different range of symptoms. Generally

You May Also Find These Documents Helpful

  • Powerful Essays

    Planarian Lab Report

    • 1335 Words
    • 6 Pages

    Planarian worms are free-living flatworms that are not parasitic. Planarians have a three-cavity digestive system. Planarians are usually either carnivorous or scavengers. Planarians may eat other living, as well as dead, invertebrates, detritus or decaying organic matter. Planarians do not realize that are eating a lot, and can over eat resulting in death. Most planarians are freshwater forms that can be found underneath dead leaves, rocks or logs. Planarians belong to the order Tricladida. Most species range from about 1/8 inch to 1 inch. There are different species which come in white, gray, black, brown and sometimes transparent. Planarians are hermaphrodites, meaning they have both female and male organs. They reproduce sexually but they cannot reproduce by fertilizing their own eggs with their sperm. Planarians can also reproduce asexually by regeneration. Planarians have become a vital model system for studying tissue regeneration and stem cell characteristics because of their quick ability to regenerate. Studying planarians will build on our current knowledge in the fields of regenerative medicine and stem cell biology. Flatworms themselves are preyed upon by a variety of predators and are intermediate levels of the food chain, so they are important because they feed other animals.…

    • 1335 Words
    • 6 Pages
    Powerful Essays
  • Satisfactory Essays

    The glow worm can live up to 5 months but would most likely die before 5 months.…

    • 109 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    (A)Adult worms in meninges lay eggs (B) eggs go into circulation, reaches the lungs (C) hatches into larvae L1. The L1 migrate up bronchial tree (D) to pharynx, coughed, swallowed, feces (E). L1 infects snails or slug through foot. L3 takes approximately 3 weeks. F-S with L3 are ingested penetrates abomasum, spinal nerves to spinal cord. Mature 20-30 days to adults. Adults migrate to subdural space to brain from ingestion to exit of eggs in feces (prepatent period).…

    • 764 Words
    • 4 Pages
    Good Essays
  • Good Essays

    biology 102 study guide

    • 7398 Words
    • 30 Pages

    -One fungus makes traps for nematode worms while another fungus has sticky knobs to hold them in place while hyphae penetrate into nematode worm’s body with digestive enzyme and extracellular digestion takes place.…

    • 7398 Words
    • 30 Pages
    Good Essays
  • Satisfactory Essays

    Study Guide 3

    • 313 Words
    • 2 Pages

    Phylum: Platyhelminthes-The flat worms----------Bilateral symmetry with acoelomic cavity. Phylum: Nematoda-The round worms--------------Pseudocoelomic cavity.…

    • 313 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Biology Quiz Paper

    • 2581 Words
    • 11 Pages

    Each of the following parasites has an intermediate host as part of its life cycle EXCEPT:…

    • 2581 Words
    • 11 Pages
    Satisfactory Essays
  • Satisfactory Essays

    6) Nephridia-small organs. they function like your kidneys, are in every segment of the earthworm's body except the 1st 3 and the very last one.…

    • 328 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Lymphatics Webquest

    • 339 Words
    • 2 Pages

    There are usually no symptoms until about a year after infection. Before the worm comes out the person may develop a fever, swelling, and pain in the area.…

    • 339 Words
    • 2 Pages
    Satisfactory Essays
  • Better Essays

    The organisms that were observed during this study belong to a group that is known as the Flatworms. Some common characteristics of the Flatworms are that they attach themselves to hosts and suck all the nutrients that are needed for survival (Jokiel et al. 1974). In this particular study the specific organism that is focused on is Dugesia tigrina (Figure 1.) also known more commonly as the brown planarian. Dugesia belong in the phylum Plateyhelminthes and in the class Turbellaria. These organisms despite being known as a member of the Flatworms are not parasitic. Instead they feed on Dugesia are mostly found in freshwater such as ponds and lakes.…

    • 1066 Words
    • 5 Pages
    Better Essays
  • Good Essays

    Essay On Pinworms

    • 864 Words
    • 4 Pages

    originates. When asleep, the female pinworms rove to the cecum of the large intestine and to lay…

    • 864 Words
    • 4 Pages
    Good Essays
  • Better Essays

    Savanna Hypothesis

    • 1810 Words
    • 8 Pages

    The burning sensation causes human hosts to feel the urge for cold water to ease the pain. However, this is host manipulation because the cool water triggers the worms to release the milky substance carrying the larvae. This allows the Guinea worm to continue the life cycle with a new generation of larvae. 5b. Hymenoepimecis argyraphaga is…

    • 1810 Words
    • 8 Pages
    Better Essays
  • Better Essays

    Parasite Host Relationship

    • 1602 Words
    • 7 Pages

    Throughout this course we have discussed the ways in which parasites manage to reside in a host, resist the immune system of the host, and keep the host alive long enough to successfully reproduce. Their ability to do this very thing has made them expert survivalists, and have allowed for adaption to the host. Researchers now know depending on the host, as well as the parasite, the form in which the parasite enters their host varies and will initiate a varying immune response. By studying parasite life cycles researchers have begun identifying the ways the typical immune system will respond to certain forms and species of parasites. By identifying the magnitude of the response, as well as the type of response researchers hope to develop more efficient vaccines and treatments for parasite burden, but in doing so have discovered the parasite host relationship offers information that can be utilized to treat immune related diseases in…

    • 1602 Words
    • 7 Pages
    Better Essays
  • Good Essays

    Toxoplasmosis

    • 901 Words
    • 4 Pages

    The pattern is similar in humans. After you're infected with T. gondii, the parasite forms cysts that can affect almost any part of the body, but often affects your brain and muscles, including the heart. If you're generally healthy, your immune system keeps the parasites inactive, and they remain in your body for life. But if your resistance is weakened by disease or certain medications, the infection can be reactivated, leading to serious complications. Although you can't catch toxoplasmosis from an infected child or adult, you can become infected if you come in contact with cat feces, ingest contaminated food or water, contaminated kitchen utensils, fruits or vegetables, or an infected organ…

    • 901 Words
    • 4 Pages
    Good Essays
  • Good Essays

    For any animal that is too large and/or too complex a circulatory system is needed to obtain essential chemicals by the process of diffusion alone. A circulatory system transports nutrients, oxygen and other important chemicals to all body cells. This system have three components: circulating fluid, a heart or pulsating vessel in charge of pumping the fluid, and vessels through these fluids travels. There are two types of circulatory system. In an Open circulatory system, the vessels are open at one end allowing hemolymph fluid to flow among the cells. Most mollusks and arthropods have this type or system. In a closed circulatory system, the fluid is called blood and this fluid remains in the vessels as it circulates the body. Most vertebrates and annelids have this type of system.…

    • 1056 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Health

    • 302 Words
    • 2 Pages

    Hobbs M, Seña EC, Swygard H, Schwebke J. Trichomoniasis vaginalis and Trichomoniasis. In: KK Holmes, PF Sparling, WE Stamm, P Piot, JN Wasserheit, L Corey, MS Cohen, DH Watts (editors). Sexually Transmitted Diseases, 4th edition. New York: McGraw-Hill, 2008, 771-793.…

    • 302 Words
    • 2 Pages
    Satisfactory Essays