17. Cestodoses of dogs, cats, and other carnivorous animals

Question 1

What class do cestodoses of dogs, cats, and other carnivorous animals belong to?

Answer 1

Cestoda

Cestoda is the class of flatworms commonly known as tapeworms.

Question 2

What is the order of the genus Dipylidium?

Answer 2

Cyclophyllidia

Question 3

What is the size range of Dipylidium caninum?

Answer 3

0.2 - 0.5 m

Question 4

What are the intermediate hosts (IH) for Dipylidium caninum?

Answer 4

• Fleas (Ctenocephalides, Pulex irritans)
• Mallophaga-chewing lice (Trichodectes canis)

Question 5

What is the morphology of the scolex of Dipylidium caninum?

Answer 5

4 suckers, rostellum with 3-4 rows of 30-60 hooks

Question 6

How are eggs of Dipylidium caninum characterized?

Answer 6

• Small
• Rounded
• Three thick shells
• Embryonated
• Brown

Question 7

What is the life cycle process of Dipylidium caninum?

Answer 7

Eggs are released in feces, ingested by flea larva, hatches into oncosphere, forms cysticercoid, flea matures, dog/cat eats flea and develops adult tapeworm.

Question 8

What are the common clinical signs of Dipylidium caninum infection?

Answer 8

• Anorexia
• Matt, brittle fur
• Vomitus

Question 9

What is the treatment for Dipylidium caninum?

Answer 9

Praziquantel

Question 10

What is the primary diagnostic method for Dipylidium caninum?

Answer 10

Proglottids in feces (looks like cucumber seeds)

Question 11

What is the zoonotic species of the genus Mesocestoides?

Answer 11

Mesocestoides lineatus

Question 12

What are the intermediate hosts for Mesocestoides?

Answer 12

• Soil mites (IH1)
• Amphibians, reptiles, birds, mammals (IH2)

Question 13

How are eggs released by Mesocestoides in the host?

Answer 13

Gravid, motile proglottids are shed in feces.

Question 14

What are the clinical signs of Mesocestoides infection?

Answer 14

Asymptomatic, enteritis, diarrhea in strong infection

Question 15

What is the treatment for Mesocestoides?

Answer 15

Praziquantel

Question 16

What is the life cycle of Taenia hydatigena?

Answer 16

Adult attached to SI, proglottids shed in feces, eggs ingested by IH, hexacanth larva migrates, encysts in peritoneal membranes, ingested by FH.

Question 17

What is the pathogenesis of Taenia hydatigena in FH?

Answer 17

Mild inflammation, typically asymptomatic.

Question 18

What is the control measure for Taenia hydatigena?

Answer 18

Restrict canine access to sheep pasture

Question 19

What is the treatment for Taenia multiceps in FH?

Answer 19

Praziquantel, fenbendazole

Question 20

What are the three stages of human coenurosis caused by Taenia multiceps?

Answer 20

• Stage 1: Meningoencephalitis
• Stage 2: Asymptomatic
• Stage 3: Deterioration of health condition

Question 21

What is the primary host for Echinococcus granulosus?

Answer 21

Dog, wolf, jackal

Question 22

What is the size of Echinococcus granulosus?

Answer 22

2-7 mm

Question 23

What type of cyst does Echinococcus granulosus develop into in the intermediate host?

Answer 23

Hydatid cyst

Question 24

What is the treatment for Echinococcus granulosus?

Answer 24

Surgery and Albendazole

Question 25

What are the clinical signs of Echinococcus multilocularis infection?

Answer 25

* Abdominal pain * Biliary obstruction * Occasionally metastatic lesions into lungs and brain

Question 26

What is the primary diagnostic method for Echinococcus multilocularis?

Answer 26

Post-mortem findings (Intestinal Scraping Technique)