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PHYLUM Common Name NEMATODA Round Worms ? ? Biology: pg 406-407BDOL: pg 731-733.

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Presentation on theme: "PHYLUM Common Name NEMATODA Round Worms ? ? Biology: pg 406-407BDOL: pg 731-733."— Presentation transcript:

1 PHYLUM Common Name NEMATODA Round Worms ? ? Biology: pg BDOL: pg

2 Nematoda # of Species?80,000+ Life Style?50% parasitic Where Are They Found? 90,000 in 1 apple 50 species infect humans alone. 10 million / meter 2 (ubiquitous)

3 Nematoda Features? One way tube No circular muscles The first “anus” Eyespots (free-living) Dioecious (means?) - Separate male & females

4 Nematoda Body Cavities? (none) - Name? - Example Organism? Acoelomate Planarian Endoderm Ectoderm Mesoderm

5 Nematoda Body Cavities? - Name? - Example Organism? Ascaris Pseudocoelom

6 Nematoda Body Cavities? - Name? - Example Organism? Coelom Earthworm or Human

7 Nematoda Pet Infections - Ascarids - Hookworms

8 Nematoda Ascarids Cats - Toxocara cati

9 Nematoda Ascarids Dogs - Toxocara canis

10 Nematoda Ascarids Raccoon - Baylisascaris procyonis - 70 to 90% infection rate - Eggs have long-term viability - Low infectious dose needed - Larval Migrans in humans Primarily dangerous to human children

11 Nematoda Ascarids Larval Migrans? Toxocariasis (TOX-o-kah-RYE-us-sis) Human ascarid infection from pets. 10,000 cases / year - Larva in wrong host - tries to complete its life cycle anyway - Larva starts to migrate – gets lost – often in the eye or brain - Larva dies - causing extreme inflammatory reaction

12 Nematoda Ascarids Larval Migrans - External Links: Cutaneous, visceral & ocular larva migrans (ex: Whipworm) Cutaneous, visceral & ocular larva migrans (ex: Whipworm) Baylisascaris procyonis (roundworm from raccoons) Dirofilaria immitis (heartworm from dogs) Strongyloides stercoralis (threadworm from dogs) - Most victims are children – consuming worm eggs in soil

13 Nematoda Ascaris lumbricoides - What protects it? - Number infested? Ascarids Scientific name of our dissection specimen? Cuticle 1 billion

14 Nematoda Ascaris lumbricoides Life Cycle? Egg

15 Nematoda Ascaris lumbricoides - Bolus (fatal)

16 Nematoda Worm ID? Hookworms Note Pharynx

17 Nematoda Ancylostoma duodenale Hookworms Life Cycle? - Larva in warm soil enter feet - Skin “trails” & “ground itch” - To blood, to lungs, then swallowed - Larvae attach to intestine & mature - Eggs leave with feces - hatch in soil - Adults mate & release eggs Scientific name?

18 Nematoda Ancylostoma duodenale - 10 – 15 mm - Hook-shaped Hookworms - Cutting plates - Anticoagulant - Anemia if 25 – 50 worms - 1,500+ infestations - May live several years Stray Facts & Vocab Terms

19 Nematoda Ancylostoma duodenale Hookworms - Anemia Symptoms? - Retarded mental & / or physical growth - Low energy (“shiftless & lazy”) - Lung cough

20 Nematoda Ancylostoma duodenale Hookworms Egg

21 Nematoda Ancylostoma duodenale Hookworms Interrupt The Life Cycle By: - Don’t Go Barefoot - Avoid Warm, Moist, Soil - Improve Sanitation In Area

22 Nematoda Enterobius vermicularis - Size: 5 – 10 mm - Glow w/bright light Pinworms - 10,000 eggs - Scotch Tape Test - Female dies after laying eggs - 1 month to mature million infested Scientific Name? - Symptoms: Itching & Nervousness

23 Nematoda Enterobius vermicularis Pinworms Eggs

24 Nematoda Drancunculus mediensis Guinea Worms What Is It?

25 Nematoda What is going on here? Guinea Worms

26 Nematoda Drancunculus mediensis Guinea Worms Why mostly the feet & lower limbs?

27 Nematoda Drancunculus mediensis Guinea Worms

28 Nematoda Is There An Intermediat Host? Guinea Worms

29 Nematoda Drancunculus mediensis Guinea Worms YES !!! The Copepod (cyclops)

30 Nematoda “Name That Disease !!!” I’m waiting.... I’m STILL waiting.... Too late, it’s....

31 Nematoda Now, What Caused It? ELEPHANTIASIS !

32 The Filarial Worm ! Nematoda OK, So What IS It? This Did !!!

33 ELEPHANTIASIS Nematoda Scientific name of the Filarial Worm? Wuchereria bancrofti That’s a HEEL

34 - LYMPHOEDEMA - ELEPHANTIASIS Edema? Nematoda

35 The Filarial Worm - ELEPHANTIASIS Nematoda

36 Is There A Vector? The Mosquito

37 ELEPHANTIASIS

38

39 Mosquito transmitted racoon filarial worm  in human eye. (Larval Migrans) River Blindness - Cause? - 18 Million People - Blackfly Eggs in water

40 Nematoda What Are These? These are muscle fibers

41 Nematoda Trichina Worms This is your tongue. What are in the cysts?

42 Nematoda Trichinella spiralis Trichina Worms Scientific Name?

43 Nematoda Trichina Worms Trichinella spiralis Disease Name? Trichinosis Wild local host? Bear

44 Abdominal pain, Allergies, Anemia Chronic fatigue, Constipation, Diarrhea Eating without feeling full Gas and bloating, Headaches Irritable bowel syndrome Itching (anus or other places) Joint and muscle aches and pains Lethargy, Loss of appetite Nervousness, Skin conditions Sleep disturbances Teeth grinding How do I tell if I have a parasite?

45 How can a parasite hurt me? Destroy cells faster than cells can be regenerated. Produce toxic substances and allergic reactions. Irritate and invade body tissue, including the skin and intestinal lining. Put pressure on body organs and cause organ obstructions. Depress immune system function while activating immune system response. Result in malabsorption of nutrients.


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