Cestodes

Question 1

Pseudophyllidea cestodes (2)

Answer 1

1. Spirometra
2. Diphyllobothrium

Question 2

Cyclophyllidea cestodes (4)

Answer 2

1. Taenia
2. Echinococcus
3. Dipylidium
4. Hymenolepis

Question 3

acetabula

Answer 3

suckers

Question 4

rostellum

Answer 4

hooks

Question 5

scolex

Answer 5

basically the head, is the vibe

Question 6

neck

Answer 6

part of worm with immature proglottids

Question 7

cestode

Answer 7

tapeworm

Question 8

proglottid

Answer 8

individual segment of tapeworm which contains male and female reproductive organs

Question 9

Differences between Pseudo- and Cyclo- phyllidea (5)

Answer 9

Question 10

strobilia

Answer 10

main body of worm, linear series of proglottids

Question 11

cyclophyllidean lifecycle

Answer 11

round egg develops into oncosphere which then becomes one of four different kinds of cysts before becoming an adult cestode

Question 12

4 Types of Cyclophyllidean Cysts

Answer 12

1. Cysticercus
2. Cysticercoid
3. Coenurus
4. Hydatid

Question 13

Pseudophyllidean Life Cycle

Answer 13

ovoid egg to round coracidium to procercoid to plerocercoid to adult cestode

Question 14

Intermediate hosts of Cyclophyllidean?

Answer 14

terrestrial

Question 15

Intermediate hosts of Pseudophyllidean?

Answer 15

aquatic (copepods –> fish)

Question 16

Zipper worm (Spirometra mansonoides)

Answer 16

pseudophyllidean stomach intestinal worm of cats, they get it from eating fish; worldwide distribution

Question 17

Diphyllobothrium

Answer 17

pseudophyllidean worm which typically infects humans, dogs, or bears, common in the PNW, Great Lakes, and Canada

Question 18

How many genital pores per segment of Taenia?

Answer 18

1

Question 19

Taenia sagninata (beef tapeworm)

Answer 19

IH = cattle
DH = humans

Question 20

Taenia solium (pork tapeworm)

Answer 20

IH = swine or humans
DH = humans

Question 21

Taenia pisiformis (rabbit tapeworm)

Answer 21

IH = rabbits
DH = dogs

Question 22

Taenia hydaginata

Answer 22

IH = sheep, cattle
DH = dog, human

Question 23

Taenia lifecycle

Answer 23

herbivore ingests eggs from feces, cysticerci develop in tissue, carnivore eats this infectious tissue, develops into adult in small intestine

Question 24

Neurocysticercosis

Answer 24

neurological signs in humans due to Taenia solium

Question 25

Taenia solium detection and prevention

Answer 25

larvae in muscle at slaughterhouse will have nodules can also see the cysticerci on underside of pig tongue

Question 26

Where are taenia solium common?

Answer 26

free range pigs (and Central and South America)

Question 27

Measly meat

Answer 27

due to tapeworms (solium and saginata)

Question 28

Taenia solium clinical signs in humans

Answer 28

NEUROLOGICAL

Question 29

Taenia saginata clinical signs in humans

Answer 29

diarrhea and weight loss

Question 30

Taenia pisiformis rabbit diagnosis

Answer 30

larval cysts (cysticercus) in liver and peritoneal cavity on the viscera; also they'll have diarrhea and an itchy butt

Question 31

Uniqueness of Taenia multiceps

Answer 31

causes larval cysts in the brain, cranium, and spinal cord of intermediate hosts (sheep and goats) which don't stop growing! ataxia, circling, blindess this is the one that looks like that weird sand you had as a kid

Question 32

Smallest taenid?

Answer 32

Echinococcus granulosus

Question 33

Definitive host of Echinococcus

Answer 33

dogs, coyotes, wolves, and other canids

Question 34

Clinical Signs of Echinococcus granulosus

Answer 34

none in definitive host, but intermediate hosts will get large cysts which may rupture in vital organs and can cause sudden death; mainly a problem in sheep

Question 35

Echinococcus multiocularis

Answer 35

DH = dog/canid, IH = humans, causes liver disease and death and easily confused with cancer

Question 36

Intermediate host of Dipylidium caninum?

Answer 36

fleas and lice

Question 37

What parasite is responsible for butt scootin' in dogs?

Answer 37

Dipylidium caninum (pruritis ani is the vet term for butt scootin')

Question 38

Anoplocephala eggs

Answer 38

unusually shaped, can be square, traingular, etc

Question 39

What type of tapeworm is the exception to praziquantel treatment?

Answer 39

Anaplocephalidae - better with benzimadazoles

Question 40

Anoplocephala perfoliata

Answer 40

D-shaped eggs, adult worms are gross (duh), collect at ileocecal valve in horses and cause colic (bonus: intermediate host is mites!)