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Parasites. Dr. N. Matthew Ellinwood, D.V.M., Ph.D. Presented by Schontonia Davis March 5, 2014. Iowa State University College of Agriculture and Life Sciences. What are Parasites?. “An organism that lives on or in a host organism and gets its food from or at the expense of the host.”
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Parasites Dr. N. Matthew Ellinwood, D.V.M., Ph.D. Presented by Schontonia Davis March 5, 2014 Iowa State University College of Agriculture and Life Sciences
What are Parasites? • “An organism that lives on or in a host organism and gets its food from or at the expense of the host.” • http://www.cdc.gov/parasites/about.html • Many often serve as vectors for many disease
Parasites • Life cycle may include many different stages • E.g., eggs, larvae, nymphs, pupae, and adults • And different hosts • the larval or juvenile stages are found in intermediate host(s) • The adult stage are found in the definitive host
Parasites • Important phyla • Arthropoda • Nematoda • Plstyhelminthes (flatworms) • Sarcomastigophora (Protozoa kingdom) • Apicomplexa
Toxascaris leonina • Common name: Ascarid/roundworm • Size of adult: 6-17 cm in SI • Host: Dogs & Cats http://www.thepetcenter.com/exa/ascarids_3.jpg http://images.google.com/imgres?imgurl=http://www.uga.edu/~lam/kids/worms/Pics/round.jpg http://www.beaglesunlimited.com/Photos/CanineRoundworms.jpg
Trichuris vulpis • Common name: Whipworm • Size of adult: 3-8 cm in cecum • Host: Dogs http://www.angelhealingcenter.com/Paras12.gif cal.vet.upenn.edu/paralab/images/labimage/lab4/4_18.gif&imgrefurl http://images.google.com/imgres?imgurl=http://www.path.cam.ac.uk/~schisto/Pic
Ancylostoma caninum • Common name: Southern Hookworm • Size of adult: 8-16 mm in SI • Host: Dogs http://www.animalhealth.bayer.ca/content/pictures/Ancylostoma%20Caninum.jpg http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-4b/Hookworm_1/Lab_4b-21a.jpg
Giardia canis • Common name: None • Flagellated protozoa • Size of organism: 10 x 18 µm • Hosts: Dogs, cats, humans, etc. http://www.nih.go.jp/niid/para/atlas/images/giardia-trph.jpg
Giardia in Motion • http://www.youtube.com/watch?v=j1sOJUw5Eo0 • http://www.youtube.com/watch?v=-yIHkq9R5_c&feature=endscreen&NR=1
Coccidia Quick Facts • Causes: • Diarrhea • Hemorrhagic enteritis • Poor growth • Occurs during very stressful events (i.e. weaning)