Trematodes

Question 1

What are the normal IH for trematodes?

Answer 1

Molluscs (snails and slugs)

Question 2

DH for fasciola hepatica?

Answer 2

Sheep, cattle, goats and other ruminants

Question 3

IH for Fasciola hepatica?

Answer 3

Aquatic snails

Question 4

Adult fasciola hepatica site of infection?

Answer 4

Bile ducts

Question 5

Immature Fasciola hepatica site of infection?

Answer 5

They migrate throughout the liver parenchyma

Question 6

What stage of Fasciola hepatica does the IH ingest?

Answer 6

Miracidia

Question 7

What stage of Fasciola hepatica is infective to the DH?

Answer 7

Metacercariae

Question 8

DH of Fascioloides magna?

Answer 8

Primarily white-tailed deer, also elk, and moose

Question 9

IH of Fascioloides magna?

Answer 9

Aquatic snails

Question 10

Adult Fascioloides magna site of infection in DH?

Answer 10

Cysts in the liver parenchyma

Question 11

Immature Fascioloides magna site of infection in the IH?

Answer 11

They migrate through the liver

Question 12

Paramphistomum cervi DH?

Answer 12

Domestic and wild ruminants throughout the world

Question 13

IH of Paramphistomum cervi?

Answer 13

Aquatic snails

Question 14

What stage of Paramphistomum cervi is infective to the DH?

Answer 14

Metacercariae

Question 15

DH of Nanophyetus salmincola?

Answer 15

Piscivorous (fish-eating) mammals

Question 16

IH of Nanophyetus salmincola?

Answer 16

1st: aquatic snail
2nd: Fish

Question 17

Nanophyetus salmincola adult site of infection?

Answer 17

Small intestine

Question 18

What stage of Nanophyetus salmincola is ingested by the snail?

Answer 18

Miracidium

Question 19

What stage of Nanophyetus salmincola is ingested by fish?

Answer 19

Cercaria

Question 20

DH for Paragonimus kellicotti?

Answer 20

Dogs, cats, wild carnivores

Question 21

IH for Paragonimus kellicotti?

Answer 21

First = aquatic snail
Second = crayfish

Question 22

DH adult site of infection of Paragonimus kellicotti?

Answer 22

Lung parenchyma

Question 23

What stage of Paragonimus kellicotti is infective to the snails?

Answer 23

Miracidia

Question 24

What stage of Paragonimus kellicotti are infective to crayfish?

Answer 24

Cercariae

Question 25

What stage of Paragonimus kellicotti is infective to DH?

Answer 25

Metacercariae

Question 26

What is the PPP for Paragonimus kellicotti?

Answer 26

4-5 weeks for dogs | 10 weeks for cats

Question 27

DH for Dicrocoelium dentriticum?

Answer 27

Sheep, cattle, goats, and other mammals

Question 28

IH for Dicrocoelium dentriticum?

Answer 28

``` 1st = terrestrial snail 2nd = Ant ```

Question 29

What is the site of infection of adult Dicrocoelium dentriticum in the DH?

Answer 29

Bile ducts and gall bladder

Question 30

What stage of Dicrocoelium dentriticum is infective to snails?

Answer 30

Embryonated eggs

Question 31

What stage of Dicrocoelium dentriticum is infective to ants?

Answer 31

Cercariae

Question 32

What stage of Dicrocoelium dentriticum is infective to DH?

Answer 32

Metacercariae

Question 33

What is the PPP for Dicrocoelium dentriticum?

Answer 33

11-12 weeks

Question 34

DH of Platynosomum illiciens?

Answer 34

Cats, wild mammals and birds

Question 35

IH of Platynosomum illiciens?

Answer 35

``` 1st = terrestrial snail 2nd = terrestrial isopod (roly polys) ```

Question 36

PH of Platynosomum illiciens?

Answer 36

Lizards, et al. reptiles and amphibians

Question 37

Platynosomum illiciens adult site of infection in the DH?

Answer 37

Gall bladder and bile ducts

Question 38

What stage of Platynosomum illiciens is infective to snails?

Answer 38

Eggs containing miracidia

Question 39

What stage of Platynosomum illiciens are infective to the DH?

Answer 39

Metacercariae

Question 40

PPP of Platynosomum illiciens?

Answer 40

2-3 months

Question 41

DH of alaria?

Answer 41

dogs, cats, and other carnivores

Question 42

IH of alaria?

Answer 42

Aquatic snails and tadpoles

Question 43

PH of alaria?

Answer 43

frogs, snakes, mouse, rats, birds, other small mammals and reptiles

Question 44

Adult site of infection in the DH for alaria?

Answer 44

Small intestines

Question 45

Immature fluke site of infection in the IH for alaria?

Answer 45

Immature flukes in the lungs

Question 46

What stage of alaria is infective to the DH?

Answer 46

Mesocercaria

Question 47

DH of Heterobilharzia americana?

Answer 47

Dogs, raccoons and bobcats

Question 48

IH of Heterobilharzia americana?

Answer 48

Aquatic snails

Question 49

Adult site of infection in DH for Heterobilharzia americana?

Answer 49

Mesenteric veins of large and small intestines

Question 50

What stage of Heterobilharzia americana is infective to the IH?

Answer 50

Miricidum

Question 51

What stage of Heterobilharzia americana infects the DH?

Answer 51

Cercariae

Question 52

What larval stage does Heterobilharzia americana lack?

Answer 52

Metacercariae

Question 53

What are the two rickettsial agents that trematodes are known vectors for?

Answer 53

Neorickettsia risticii and Neorickettsia helminthoeca