Midterm 3 Parasitlogy

Question 1

Liver fluke

Answer 1

Fasciola hepatica

Fasciola gigantica

Question 2

Liver fluke, intermediate host

Answer 2

Galba truncatula (Pulmonate freshwater snail)

Question 3

Rumen fluke

Answer 3

Calicophoron daubneyi
Paramphistomum cervi
Paramphistomum ichikawai

Question 4

Rumen fluke, intermediate host

Answer 4

Galba truncatula (Calicophoron daubneyi)
Red blooded pulmonate freshwater snail (Parahistomum cervi et. ichikawai)

Question 5

Lancet fluke

Answer 5

Dicrocoelium dendriticum

Question 6

Lancet fluke, intermediate host

Answer 6

Landsnail

Ants (Formica genus)

Question 7

Final host of the common liver fluke

Answer 7

Most: Sheep, goat, rabbit, mouse and rat
Medium: Cattle, pig and humans
Least: Horse, cat and dog

Question 8

Life-cycle of F. hepatica

Answer 8

Egg –> Miracidium (penetrate the snail) –> Sporocyst –> Radia 1 –> Radia 2 –> Cercariae (when raining it leaves the snail) –> Metacercariae (infective stage!) (ingested by Ru) –> Juvenile fluke –> Adult fluke
Liver –> parenchyma –> biliary duct
Feed on blood
Prepatent period: 6-12 weeks

Question 9

Final host of Calicophoron

Answer 9

Cattle

Question 10

Final host of Paramphistomum cervi

Answer 10

Sheep, goat and wild ruminants

Question 11

Final host of Paramphistomum ichikawai

Answer 11

Wild ruminants

Question 12

Prepatent period of rumen flukes

Answer 12

3-4 months

Question 13

Final host of the Lancet fluke

Answer 13

Sheep, goat, cattle, wild Ru, rabbit, hare (pig, horse, human)

Question 14

Lancet fluke egg

Answer 14

Dark red-ish brown with miracidium, detection by flotation, it is the smallest

Question 15

Life-cycle of the Lancet fluke

Answer 15

Egg (Miracidium) –> Eaten by a snail –> Sporocyst 1 –> sporocyst 2 –> Cercaria (snail will sneeze them out in a slime ball –> eaten by an ant) –> metacercaria –> Juvenile fluke –> Adult fluke
The juvenile fluke reach the liver through the ductus choledochus (no paranchymal migration, thus no damage)
Get nutrients via ABSORPTION!

Question 16

Blood fluke

Answer 16

Schistosoma mansoni
Schistosoma haematomium
Schistosoma japanicum
Schistosoma turbestanicum

Question 17

Blood fluke location

Answer 17

In blood vessels (sexual dimorphism)

Question 18

Life-cycle of the blood fluke

Answer 18

Egg (miracidium) –> snail –> sporocyst 1 –> sporocyst 2 –> Furocercaria (infective stage!) –> final host
Per cutan or per os

Question 19

Fish tapeworm

Answer 19

Diphyllobothrium latum

Question 20

Life-cycle of fish tapeworm

Answer 20

Egg –> water –> coracidium –> crustacean –> procercoid –> water –> fish –> plerocercoid (infective stage) –> fish eating mammal –> adult
Prepatent period: 2-6 weeks

Question 21

Cestodes of the ruminants

Answer 21

Monezia expansa

Monezia benedeni

Question 22

Monezia, larval form

Answer 22

Cysticercoid

Question 23

Cestodes of the quines

Answer 23

Anocephala perfoliata

Anocephala magna

Question 24

Anocephala, larval form

Answer 24

Cysticercoid

Question 25

Human tapeworms

Answer 25

Taenia solium | Taenia saginata

Question 26

Taenia solium, intermediate host and larval form

Answer 26

Swine (skeletal muscles, accidentally in brain or eye of humans) Cysticercus cellulosae

Question 27

Taenia saginata, intermediate host and larval form

Answer 27

Unarmed Cattle (skeletal muscles) Cysticercus bovis

Question 28

Tapeworms of carnivores

Answer 28

``` Taenia pisiformis Taenia hydatigena Taenia ovis Taenia cervi Taenia crassiceps Taenia taeniformis ```

Question 29

Taenia pisiformis, intermediate host and larval form

Answer 29

Rabbit and hares, Liver | Cysticercus pisiformis

Question 30

Taenia hydatigena, intermediate host and larval form

Answer 30

Ruminants, walnut sized, liver | Cysticercus tenucollis

Question 31

Taenia ovis, intermediate host and larval form

Answer 31

Sheep, skeletal muscles | Cysticercus ovis

Question 32

Taenia cervi, intermediate host and larval form

Answer 32

Deer, skeletal muscles | Cysticercus cervi

Question 33

Taenia crassiceps, intermediate host and larval form

Answer 33

Rodents, body cavity | Cysticercus longicollis

Question 34

Taenia taeniformis, intermediate host and larval form

Answer 34

Rodents, liver | Strobilocercus fasciolaris

Question 35

Tapeworms of canines

Answer 35

Taenia multiceps | Taenia serialis

Question 36

Taenia multiceps, intermediate host and larval form

Answer 36

Small ruminants, CNS (mainly in the brain) Coernus cerebralis Walnut sized GID! --> false GID is by Oestrus ovis (nasal bot fly)

Question 37

Taenia serialis, intermediate host and larval form

Answer 37

Hares, subcutaneous tissue or intermuscular CT | Coernus serialis

Question 38

Flea tapeworm

Answer 38

Diplydium caninum

Question 39

Diplydium caninum, larval form

Answer 39

Cysticercoid

Question 40

Intermediate host of Diplydium caninum

Answer 40

Ctenocephalides fleas or | Trichodentes canis

Question 41

Echinococcus worms

Answer 41

Echinococcus granulosus | Echinococcus multiocularis

Question 42

Echinococcus granulosus, morphology, intermediate host and larval form

Answer 42

3 segments long Bovine, suis, equine and humans; visceral organs (LIVER) + bone marrow Sheep and goat; mainly in the lungs Echinococcus hyatidosus

Question 43

Echinococcus multiocularis, morphology, intermediate host and larval form

Answer 43

5 segments long Rodents and humans; mainly in liver Echinococcus alveolaris