20. Cestodoses of poultry Flashcards
(27 cards)
What is the order of cestodoses in poultry?
Cyclophyllida & pseudophyllida
What families are included in the order Cyclophyllida - of poultry?
- Davaineidae
- Dilepididae
- Hymenolepididae
What is the definitive host (& location) for Davainea proglottina?
Poultry - Turkey, guinea fowl, pigeons
Duodenum
What is the intermediate host for Davainea proglottina?
Terrestrial snail and slugs – cysticercoid stage
What is the size range of Davainea proglottina?
Small – only 4-9 segments
Describe the morphology of Davainea proglottina’s scolex.
80-90 small hooks in 3-6 rows. Suckers have 4-5 rows of hooks
How are eggs of Davainea proglottina released?
Gravid segments of the adult tapeworms are released after 13 days in the chicken’s intestine
What clinical signs are associated with Davainea proglottina infection?
- Weight loss
- Rapid breathing
- Dry and ruffled feathers
- Necrotic, hemorrhagic enteritis
- Can be fatal
What treatments are effective against Davainea proglottina?
- Praziquantel
- Niclosamide
Species of family Davaineidae affecting poultry?
- Davainea proglottina
- Raillietina cesticullis, R. echinobothrida, R. tetragona
List the species of the genus Raillietina.
- Raillietina cesticullius
- Raillietina echinobothrida
- Raillietina tetragona
What is the size range of Raillietina species?
15-25 cm – large tapeworms
What is the pathogenesis of Raillietina species?
Less pathogenic. Do not cause severe pathology, but use host nutrients
What clinical signs are associated with Raillietina infection?
Non-specific
- Weakness
- Poor growth
- Diarrhea
- Inflammation and degradation of the villi
can cause nodules in SI, leading to enteritis
What is the treatment for Raillietina infections?
- Praziquantel
- Niclosamide
- Flubendazole
What family does Amoebotaenia cuneata belong to?
Dilepididae
What is the definitive host for Amoebotaenia cuneata?
Poultry – SI
What is the pathogenesis of Amoebotaenia cuneata?
Enteritis
What family does Drapanidotaenia laceloata belong to?
Hymenolepitidae
What is the life cycle of Diphyllobothrium dendriticum?
Egg reaches the water, embryonates, hatches into coracidium, ingested by copepods, develops into procercoid, then plerocercoid in fish, and finally reaches the definitive host
What is the definitive host for Diphyllobothrium dendriticum?
Man, fish eating mammals and birds – SI
What is a clinical sign of Diphyllobothrium dendriticum infection?
- Obstruction of SI
- Diarrhea or stop of feces
What is the treatment for Diphyllobothrium dendriticum?
- Praziquantel
- Niclozamide
What is the pathogenesis of Lingula intestinalis?
Attacks ovaries of fish, atrophy of gonads due to derangement of hormonal balance
