Lecture 22: Tapeworm Disease I Flashcards
Where do tapeworms primarily infect
Small intestine
What is the scolex
Anchoring organ
What is the proglottid
Segment containing hermaphroditic reproductive organs, terminal plogottids contain eggs
What is the basic life cycle of tapeworms/cestodes
- Eggs passed in feces of definitive host
- Metacestode- infective stage, develops in 2nd intermediate host
- Definitive host ingests intermediate host or paratenic host
What is the infective stage for tapeworms/cestodes
Metacestodes
Which intermediate host do metacestodes develop in
2nd
Where do Taenia tapeworms infect and what species are infected
Adults infect SI of Felids, canids
Passage of proglottids can cause ___
Perianal irritation
How do you dx taenia tapeworms
Fecal float
What is the intermediate host of taenia tapeworms
Prey species of definitive host
What species does Taenia hydatigena infect
Dogs
What are the intermediate host for T. Hydatigena
Domestic and wild ruminants, swine
How does T. Hydatigena develop in IH
- Larvae migrates to liver
- Then to abdominal cavity where metacestode encysts
What are some signs of heavy acute infections of T. Hydatigena in IH
Hepatitis, peritonitis, pneumonia
Fatal in young animals
identify the genus, adult worms primarily infect SI
Taenia eggs
How do you dx T. Hydatigena in sheep
MRI or US of liver
What is the tx for T. Hydatigena in dogs and sheep
Dogs: praziquantel, epsiprantel, fenbendazole
Sheep; praziquantel
What species does T. Taeniaeformis infect
Cats
What is the intermediate host for T. Taeniaeformis
Rodents, rabbits
Following is SI of barn cat who actively hunted rodents, what parasite was it infected with
T. Taeniaeformis
What is tx for T. Taeniaeformis
Praziquantel, epsiprantel, fenbendazole
Abdominal radiograph of a cat with a suspected intestinal impaction shows loops that resemble a “string of pearls” what parasite could this be
T. Taeniaeformis
What species does T. Pisiformis infect
Dogs
What is the intermediate host for T. Pisiformis
Rabbits, hares, rodents
Describe the development/movement of T. Pisiformis in intermediate host
- Migrates to liver
- Encysts in peritoneal membrane
What species do Echniococcus tapeworms infect/ where do they infect
SI of Dogs and cats
What is the intermediate host for Echinococcus tapeworms
Prey of definitive host
What species does E. Granulosus infect
Dogs
What is the intermediate host for E. Granulosus
Domestic and wild ruminant, pigs, camelids, equids
E. Granulosus cause __cyst in liver and lungs
Hydatid cyst in liver and lungs
What are hydatid cysts
Metacestodes that contain protoscolices that can develop onto adult worms
What are some some clinical signs of E. Granulosus
Liver: abdominal distention, discomfort, ascites, jaundice
Lung: pneumonia, bronchial compression, cough, dyspnea
What is present on the liver and lungs? Parasite commonly infects dogs, intermediate host are ruminants, pigs, camelids, and equids
hydatid cysts
Why is the control of E. Granulosus important in sheep raising regions of the world
Zoonotic hydatid disease
How do you dx E. Granulosus in dogs
- Fecal float
How do you dx E. Granulosus in sheep
US or CT of liver/lungs
What is the treatment for E. Granulosus in dogs
Dogs: praziquantel and epsiprantel
What species does diplyidium caninum primarily infect and where
SI of dogs and cats
What is the intermediate host of D. Caninum
Fleas, chewing lice
How does D. Caninum spread from IH to DH
Larvae fleas or lice ingest eggs, metacestodes form and cat/dog ingest during grooming
Dog presented with flea infestation and fecal showed these eggs. What are they
D. Caninum
