1 / 22

The Evil Mind Controlling Parasite aka Dicrocoelium dendriticum

Allaa Hassan. The Evil Mind Controlling Parasite aka Dicrocoelium dendriticum. dih - kroh -SEE-lee-um den- DRIH - tih - kum. D. Dendriticum. Phylum: Platyhelminthes Class: Trematoda Order: Plagiorchiida Family: Dicrocoeliidae Genus: Dicrocoelium Species: Dicrocoelium dendriticum

barto
Télécharger la présentation

The Evil Mind Controlling Parasite aka Dicrocoelium dendriticum

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Allaa Hassan The Evil Mind Controlling ParasiteakaDicrocoelium dendriticum

  2. dih-kroh-SEE-lee-um den-DRIH-tih-kum

  3. D. Dendriticum • Phylum: Platyhelminthes • Class: Trematoda • Order: Plagiorchiida • Family: Dicrocoeliidae • Genus: Dicrocoelium • Species: Dicrocoelium dendriticum • Liver fluke that is a parasite fluke. • Lives in the liver of its hosts • 3 host life cycle • Adult worm chills inside sheep/cow • Lays eggs • Sheds into environment with host’s poo

  4. Geographic Range • Europe • North Asia • North America and Australia • North Africa • Found in areas favoring intermediate hosts • Fields with dry and chalky soils.

  5. Definitive Hosts • Cows • Sheep • Any ‘grazer’ • Although rare, humans, herbivorous, and carnivorous mammals can also serve as definitive hosts • through ingestion of infected ants. • No known vector

  6. Intermediate hosts • 1st • Land snail • 2nd • Ant

  7. Reservoirs • Sheep • Cows • Land snails • Ants • Goats • Pigs • Llamas • Alpacas

  8. Life Cycle

  9. Life cycle… • Captain Higgins • http://theoatmeal.com/comics/captain_higgins

  10. Life cycle… • Cows/sheep spread D. dendricitum eggs via poo. • Snails ingest poo along with eggs. • Eggs hatch in snail intestine, parasite crosses the wall of snail gut, settles in digestive gland, matures into fluke. • Fluke produces cercariae, snail’s defense system wraps cercariae in balls of slime. • Slime is coughed up by snail. • Ants ingest slime balls along with cercariae. • Parasite enters ant’s body, wanders, finds its way to a cluster of nerves that control ant’s motor skill. • Most lancet flukes go back to abdomen to form cysts. • 1 or 2 stay behind in ants head…

  11. Zombie mode (Symptoms/effects) • Once they have control over ant’s motor skills…zombie mode begins. • When the sun goes down, and the temperature is a bit cooler, the infected ant leaves its colony and is driven to the top of a blade of grass. • The ant is driven to clamp its jaws on the blade of grass until the sun rises once again. • (if ant is not eaten) once dawn comes, the ant resumes it daily activities with the colony, as if nothing happened. • This continues night after night until the ant is eaten with blades of grass, by grazers.

  12. Video • http://www.youtube.com/watch?v=lGSUU3E9ZoM

  13. Once ingested… • The flukes shoot out of the ants head and head straight for the liver. • They chill there until they’re adults. • Continue their lifecycle; they stay there, get married, have baby eggs. • Eggs are released into the • bile duct • Intestines • Poo

  14. Question • Why does the ant come out at night and then head back to the colony after dawn? • Why not stay out during daylight?

  15. Diagnostic tests • Humans • examine bile/ duodenal fluid for eggs • Animals • stool examination • post-mortem examination of the liver.

  16. Symptoms in Humans • Rare in humans • Most infections are asymptomatic and light • In heavier infections: • Cholecystitis • Inflamed gallbladder • Liver abscesses • Upper abdominal pain.

  17. Treatment • Drug of choice • Praziquantel

  18. Simon Says…

  19. Works Cited • http://people.emich.edu/kselby/page%202.html • http://theoatmeal.com/comics/captain_higgins • http://www.damninteresting.com/a-fluke-of-nature • http://www2.biology.ualberta.ca/parasites/ParPub/text/index/plagi02i.htm • http://www.youtube.com/watch?v=lGSUU3E9ZoM • http://dailyparasite.blogspot.com/2010/08/august-10-dicrocoelium-dendriticum.html • http://www.dpd.cdc.gov/dpdx/HTML/Dicrocoeliasis.htm • http://www.dpd.cdc.gov/dpdx/HTML/Dicrocoeliasis.htm

More Related