ANIMAL PARASITOLOGY LAB. BIOL 4426L

LAB. #6.

Family Echinostomatidae

Echinostomum revolutum - (Text Pages 251-253)

Slide: whole worm,

- Locate the oral sucker. What unique feature distinguishes this worm?

- Locate and identify the ovary, uterus and the testes

- Can you distinguish the intestinal cecae and vitellaria?

Family Dicrocoeliidae

Dicrocoelium lanceolatum (dendriticum) - (Text Pages 263-265)

Slide: whole worm,

- Locate the oral sucker, ventral sucker.

- Locate and identify the ovary, uterus and the testes

- Can you distinguish the intestinal cecae and vitellaria?

- What unique feature distinguishes this worm?

Study questions: What is unique about the life cycle of this worm?

Family Troglotrematidae

Paragonimus westermani - (Text Pages 267-271)

Slide: whole worm,

- Locate the oral sucker, ventral sucker.

- Locate and identify the ovary, and testes. What are their shapes?

- Can you distinguish the intestinal cecae and vitellaria?

- What unique feature distinguishes this worm?

Slide: egg

- Distinguish this egg from the others you have seen

- How would you collect a sample of eggs from a patient?

Slide: redia,

- What morphological features distinguish this stage?

- What host is parasitized by this stage?

Slide: cercaria,

- What is the shape of this stage. How is it different from cercaria of

Fasciola and Schistosoma?

Slide: metacercaria,

- Locate the oral sucker, ventral sucker, ceca, and excretory bladder.

- Where is this stage found

- What host is parasitized by this stage?

Study questions: Where are adults of this worm located in the host?

How does a human become infected with this worm?

What hosts are the metacercaria in? the redia?

How are the eggs passed out of the body of the host?

Family Heterophyidae

Heterophys heterophys - (Text Pages 277-278)

Slide: whole worm,

- Locate the oral sucker, ventral sucker.

- Locate and identify the ovary, and testes. What are their shapes?

- Can you distinguish the intestinal cecae and vitellaria?

- What unique morphological feature distinguishes this worm?

Family Hirudinellidae

Hirudinella ventricosa - (not in book)

Whole worms in jar

- What hosts are these worms found in?

- What is distinctive about these worms?

BE ABLE TO DISTINGUISH THE DIGENETIC EGGS

Phylum Platyhelminthes

Class Monogenea (Text Pages 277-278)

Order Dactylogyridea

Family Dactylogyridae

Haplocleidus furcatus

- Locate the head organs, eye spots and pharynx

- Locate the haptor, with its anchors and bars.

- How many anchors and bars can you see?

Clavunculus bursatus

- Locate the head organs, eye spots and pharynx

- Locate the haptor, with its anchors and bars.

- How many anchors and bars can you see?

- How does the size of this parasite differ from the others?

Order Capsalidea

Family Capsalidae

Tristomella laevis

- Locate the head organs, eye spots and pharynx

- Locate the haptor, with its anchors and bars.

- How many anchors and bars can you see?

- How does the size of this parasite differ from the others?

- What structures are present on the anterior of this worm that are not seen on the other worms?

Order Mazocraeidea

Neothorcocotyl sp.

- Locate the head organs and pharynx

- Locate the haptor, with its attachment organs. What are they called?

- How do these attachment organs differ from the other species of

monogenea you have seen? How many are present?

- How does the size of this parasite differ from the others?