ANIMAL PARASITOLOGY LAB. BIOL 4426L

LAB. #8.

Flatworms

Phylum Platyhelminthes

Class Cestoidea(Text pages 297-323)

Order Pseudophyllidea

Family Diphyllobothriidae (Text pages 325-329)

Diphyllobothrium latum – (Text pages 325-329)

Slide: scolex

-Locate and identify the attachment organs on the scolex. What is this type of attachment called?

Slide : proglottid

-Locate the ovary, testes, uterus and genital opening

Slide: eggs

-Can you see the operculum and the small knob at the terminal end?

Taenia solium – (Text pages 333-335)

Slide: Scolex with hooks

- Locate and identify the attachment organs on this worm

- There are other species of cestodes that you will see that have a similar attachment organs.

- Be able to distinguish the scolices

Slide: mature proglottid – demonstration

- Locate the ovary, uterus, genital opening, cirrus, testes, vitelline gland

Slide: gravid proglottid - demonstration

- How many branches of the uterus can you count. How many are there supposed to be?

Slide: Cysticercus whole mount

- Locate the invaginated scolex. Make sure you see the rostellar spines

- What is the common name of this type of larval cestode?

Taeniarhynchus saginatus – (Text pages 331-333)

Slide: mature proglottid

- Locate the ovary, uterus, genital opening, cirrus, testes, vitelline gland

Slide: gravid proglottid -

- How many branches of the uterus can you count. How many are there supposed to be?

Slide: Eggs

- What is distinctive about these eggs? These are typical for all the species of Taenia.

Echinococcus granulosis – – (Text pages 337-340)

Slide: whole worm

- How many proglottids are present on this worm?

- What kind of attachment organs are present on the scolex

- How big is the whole worm?

Slide: hydatid sand

- Where are these parasites found?

- What host?

- Locate the rostellar spines

Slide: hydatids in tissue sections

- Locate the parasite tissue. How many layers can you see?

- Identify the developing protoscolices

- What host is this stage found in?

Slide: Eggs

- What is distinctive about these eggs? Can you distinguish these from the Taenia eggs?