Lecture 22: Tapeworm Disease I

Question 1

Where do tapeworms primarily infect

Answer 1

Small intestine

Question 2

What is the scolex

Answer 2

Anchoring organ

Question 3

What is the proglottid

Answer 3

Segment containing hermaphroditic reproductive organs, terminal plogottids contain eggs

Question 4

What is the basic life cycle of tapeworms/cestodes

Answer 4

1. Eggs passed in feces of definitive host
2. Metacestode- infective stage, develops in 2nd intermediate host
3. Definitive host ingests intermediate host or paratenic host

Question 5

What is the infective stage for tapeworms/cestodes

Answer 5

Metacestodes

Question 6

Which intermediate host do metacestodes develop in

Answer 6

2nd

Question 7

Where do Taenia tapeworms infect and what species are infected

Answer 7

Adults infect SI of Felids, canids

Question 8

Passage of proglottids can cause ___

Answer 8

Perianal irritation

Question 9

How do you dx taenia tapeworms

Answer 9

Fecal float

Question 10

What is the intermediate host of taenia tapeworms

Answer 10

Prey species of definitive host

Question 11

What species does Taenia hydatigena infect

Answer 11

Dogs

Question 12

What are the intermediate host for T. Hydatigena

Answer 12

Domestic and wild ruminants, swine

Question 13

How does T. Hydatigena develop in IH

Answer 13

1. Larvae migrates to liver
2. Then to abdominal cavity where metacestode encysts

Question 14

What are some signs of heavy acute infections of T. Hydatigena in IH

Answer 14

Hepatitis, peritonitis, pneumonia

Fatal in young animals

Question 15

identify the genus, adult worms primarily infect SI

Answer 15

Taenia eggs

Question 16

How do you dx T. Hydatigena in sheep

Answer 16

MRI or US of liver

Question 17

What is the tx for T. Hydatigena in dogs and sheep

Answer 17

Dogs: praziquantel, epsiprantel, fenbendazole
Sheep; praziquantel

Question 18

What species does T. Taeniaeformis infect

Answer 18

Cats

Question 19

What is the intermediate host for T. Taeniaeformis

Answer 19

Rodents, rabbits

Question 20

Following is SI of barn cat who actively hunted rodents, what parasite was it infected with

Answer 20

T. Taeniaeformis

Question 21

What is tx for T. Taeniaeformis

Answer 21

Praziquantel, epsiprantel, fenbendazole

Question 22

Abdominal radiograph of a cat with a suspected intestinal impaction shows loops that resemble a “string of pearls” what parasite could this be

Answer 22

T. Taeniaeformis

Question 23

What species does T. Pisiformis infect

Answer 23

Dogs

Question 24

What is the intermediate host for T. Pisiformis

Answer 24

Rabbits, hares, rodents

Question 25

Describe the development/movement of T. Pisiformis in intermediate host

Answer 25

1. Migrates to liver 2. Encysts in peritoneal membrane

Question 26

What species do Echniococcus tapeworms infect/ where do they infect

Answer 26

SI of Dogs and cats

Question 27

What is the intermediate host for Echinococcus tapeworms

Answer 27

Prey of definitive host

Question 28

What species does E. Granulosus infect

Answer 28

Dogs

Question 29

What is the intermediate host for E. Granulosus

Answer 29

Domestic and wild ruminant, pigs, camelids, equids

Question 30

E. Granulosus cause __cyst in liver and lungs

Answer 30

Hydatid cyst in liver and lungs

Question 31

What are hydatid cysts

Answer 31

Metacestodes that contain protoscolices that can develop onto adult worms

Question 32

What are some some clinical signs of E. Granulosus

Answer 32

Liver: abdominal distention, discomfort, ascites, jaundice Lung: pneumonia, bronchial compression, cough, dyspnea

Question 33

What is present on the liver and lungs? Parasite commonly infects dogs, intermediate host are ruminants, pigs, camelids, and equids

Answer 33

hydatid cysts

Question 34

Why is the control of E. Granulosus important in sheep raising regions of the world

Answer 34

Zoonotic hydatid disease

Question 35

How do you dx E. Granulosus in dogs

Answer 35

1. Fecal float

Question 36

How do you dx E. Granulosus in sheep

Answer 36

US or CT of liver/lungs

Question 37

What is the treatment for E. Granulosus in dogs

Answer 37

Dogs: praziquantel and epsiprantel

Question 38

What species does diplyidium caninum primarily infect and where

Answer 38

SI of dogs and cats

Question 39

What is the intermediate host of D. Caninum

Answer 39

Fleas, chewing lice

Question 40

How does D. Caninum spread from IH to DH

Answer 40

Larvae fleas or lice ingest eggs, metacestodes form and cat/dog ingest during grooming

Question 41

Dog presented with flea infestation and fecal showed these eggs. What are they

Answer 41

D. Caninum