Lecture 1

Question 1

What is helminthology

Answer 1

the study of helminthes or “worms”

Question 2

name the 4 Phylums of Helminthology and the common name for each

Answer 2

Playthelminthes- “flatworms” aka- flukes and tapeworms
Nematoda- “Roundworms”
Namatomorpha- “horse-hair worms”
Acanthocephala- “thorny-headed worms”

Question 3

What are the three classes of phylum Platyhelminthes

Answer 3

Trematoda- Flukes
Eucestoda- true tapeworms
Cotyloda- pseudotapeworms

Question 4

What are the two subclasses of Class Trematoda

Answer 4

Subclass Digenea & Subclass Monogenea

Question 5

A subclass of trematodes that are typically ectoparasites and associated with water; infesting the skin/gills of fish, amphibians, and reptiles.

Answer 5

Monogenetic trematodes

Question 6

Monogenetic trematodes commonly occur in domesticated animals- true or false?

Answer 6

False- None of the monogenetic trematodes occure in domestic animals.

Question 7

a subclass of trematodes that are endoparasitic of domestic and wild animals and humans; that have more than one intermediate host

Answer 7

Digenetic trematodes

Question 8

Fill in the blank:

The first intermediate hose for any digenetic fluke is usually a ______

Answer 8

Snail

Question 9

What are the 7 morphological features of FLUKES

Answer 9

1. Dorsoventrally flattened (may be long and narrow or leaf-shaped)
2. have a tegument (outer-skin that’s covered in tiny spines or smooth)
3. two organs of attachment (oral sucker and acetabulum)
4. have GI system
5. have and excretory system
6. have a nervous system
7. complex reproductive system- hermaphroditic

Question 10

What are the only digenetic flukes that are not hermaphroditic and are long and thin?

Answer 10

Schistosomes aka. “blood-flukes”

Question 11

What does the digestive tract of a digenetic trematode consist of?

Answer 11

oral sucker> mouth> muscular pharynx> esophagus> two blind ceca (either simple or dendritic)

Question 12

Trematodes have a tremendous reproductive capacity- True or False?

Answer 12

True

Question 13

What are the 7 developmental stages in the life cycle of a typical fluke?

Answer 13

Operculated Egg> Miracidium> Sporocyst> Redia> Cercariae> Metacercaria> Adult Fluke

Question 14

What is the normal first intermediate host of any digenetic fluke?

Answer 14

A snail

Question 15

A single Miracidium will only produce 1 cercariae. True or False?

Answer 15

False- 1 miracidium can produce thousands of cercariae.

Question 16

The lancet fluke of ruminants

Answer 16

Dicrocoelium dendriticum

Question 17

Fluke that causes liver poisoning in cats

Answer 17

Platynosomum fastosum

Question 18

What are the three major reasons for why Fasiola hepatica is such an important ruminant fluke?

Answer 18

1. it is the most pathogenic fluke of cattle in the US
2. it is a major cause of liver condemnation in slaughter houses, producing a contition known as FASCIOLIASIS.
3. it is the best known of all the flukes regarding the details of its’ lifecycle and pathology.

Question 19

What is fascioliasis?

Answer 19

Liver rot or liver fluke disease

Question 20

What are the liver flukes of the ruminants?

Answer 20

Fasciola hepatica and fascioloides magna

Question 21

What are the rumen flukes of the ruminants?

Answer 21

Paramphistomum and Cotylophoron species

Question 22

what are the 2 syndromes of Fasciola hepatica infection

Answer 22

Acute Fascioliasis and Chronic fascioliasis