Pseudophyllideans (False Tapeworms)- Diphyllobothriideans

Question 1

Spirometera mansonoides definitive host

Answer 1

Dog, cats, raccoons (small intestine)

Question 2

Spirometera mansonoides intermediate host

Answer 2

Copepod (cyclops)
Vertebrate with exception of fish (amphibians, reptiles, birds, small mammals, rodents)

Question 3

Location of type of larval stages in intermediate host

Answer 3

Copepod: body cavity with procercoid
Vertebrates: muscles and tissue with plerocercoid

Question 4

Type of larval infective stage for definitive host

Answer 4

Plerocercoid (sparganum)

Question 5

Spirometera mansonoides lifecycle

Answer 5

Indirect that requires 2 intermediate hosts
Prepatent: 2 weeks

Question 6

Spirometera mansonoides characteristics

Answer 6

Adults more than 1 foot in length
Small scolex and long strobila (body)

Question 7

Spirometera mansonoides lifecycle steps

Answer 7

1. Spirometers eggs passed in feces of infected dog or cat into environment
2. In aquatic environment eggs develop a ciliated larva (coracidium)
   3a. Copepod ingest coracidium that develops into procercoid
   3b. Vertebrate etas copepod, then developers plerocercoid
3. Dog or cat eats vertebrate and plerocercoid develops into adult

Question 8

Clinical signs of Spirometera mansonoides

Answer 8

Rarely causes disease in definitive host
May see diarrhea, weight loss and vomiting

Question 9

How do you diagnose Spirometera mansonoides and Diphyllobothrium latum?

Answer 9

Fecal flotation
Fecal sedimentation

Question 10

Spirometera mansonoides and Diphyllobothrium latum eggs

Answer 10

Resemble fluke egg
Have operculum
Granular multicellular content

Question 11

How do you treat Spirometera mansonoides and Diphyllobothrium latum?

Answer 11

Praziquantel (4-6 times the usual dose for Dipylidium caninum ans Taenia species)
Keep dogs and cats from roaming and scavenging raw fish

Question 12

Public health significance of Spirometera mansonoides

Answer 12

Zoonotic
Causes Sparganosis in human

Question 13

What is the definitive host and type of larval infective stage of Diphyllobothrium latum?

Answer 13

Dogs, cats, man in small intestine
Plerocercoid

Question 14

Intermediate host and type of larval infective stage of Diphyllobothrium latum

Answer 14

Copepod (diaptomus)- body cavity with procercoid
Fish- muscle and tissue with plerocercoid

Question 15

Lifecycle of Diphyllobothrium latum

Answer 15

Indirect that requires 2 intermediate host
Prepatent: 5-6 weeks

Question 16

Characteristics of Diphyllobothrium latum

Answer 16

Adults can grow up to 9 feet or more
Broad fish tapeworm

Question 17

Lifecycle steps of Diphyllobothrium latum

Answer 17

1. Diphyllobothrium eggs passed in feces of infected dog or cat into environment
2. In aquatic environment eggs develop a ciliated larva (coracidium)
   3a. Copepod ingest coracidium that develops into procercoid
   3b. Fish etas copepod, then develops plerocercoid
3. Dog or cat eats vertebrate and plerocercoid develops into adult

Question 18

Clinical signs of Diphyllobothrium latum

Answer 18

Diarrhea
Weight loss
Vomiting
May cause anemia