1 / 20

PARASITES

PARASITES. By:afnan bakhsh. Parasitology : the study of parasites. Parasite: it is organism living in or on other organism. Parasites can be divided to: Protozoa. unicellular Helminthes. Multicellular Arthropods. Multicellular. Protozoa:.

hidi
Download Presentation

PARASITES

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. PARASITES By:afnanbakhsh

  2. Parasitology: the study of parasites. • Parasite: it is organism living in or on other organism.

  3. Parasites can be divided to: • Protozoa. unicellular • Helminthes. Multicellular • Arthropods. Multicellular

  4. Protozoa: • Single cell (unicellular) eukaryotes. • They can live as free organisms or parasites. • They transmitted by: • Blood sucking insect bites. • Accidental ingestion. • It have two stages: • Cyst: dormant stage outside the body. • Trophozoite: active stage inside the body.

  5. Protozoa are classified into four classes according to their motility: 1-ameobsas 2-ciliates 3-flagellates 4-sporozoa

  6. Amoebas: move by pseudo pods (Ex:Entamoebahistolotica). Cyst Trophozoite

  7. Ciliates: move by cilia (Ex:Balantidium coli). Cyst Trophozoite

  8. Flagellates: move by flagella (Ex:Trypanosoma).

  9. Sporozoa: intracellular parasite, doesn’t move it transmit through the blood (Ex:Plasmodium). Blood parasite.

  10. Helminthes (worms): • Multicellular eukaryotic organisms. • - It has two stages: • Larval stage (egg): measure 100-200 Mm. • Adult worms: measure from cm to meters.

  11. Adult worms: measure from cm to meters. • They can classify into: • Nematode: Ex. Ascaris. • Trematode: Ex. Schistosoma. • Cestode: Ex. Taenia.

  12. ascaris

  13. Schistosoma.

  14. taenia

  15. Arthropods (insects): • Ex: mosquitoes, bee, flea and flies. • Harmful effects of them: • Food poisoning. • Discomfort. • Cause diseases and transmit diseases. • Damage of crops.

  16. Benefit of arthropods: • Bees produce honey. • Fertilization of plants and flowers.

More Related