Strongylidae, Stephanuridae, Synganimidae Flashcards
What is the common name of Strongylus spp?
Palisade or red worms of horses
What are the general classifications of Strongylidae?
Well developed buccal capsule, leaf crown or corona radiata, and copulatory bursa
Which species affects the cecum and colon of horses and has a buccal cavity containing 1 large tooth and 2 small teeth?
Strongylus equinus
Which species has a special migratory phase in the liver of horses and is characterized by a buccal cavity devoid of teeth?
Strongylus dentatus
Which Strongylidae species has well developed ear shaped teeth?
Strongylus vulgaris
What is the main condition caused by Strongylus vulgaris that is fatal in nature?
Parasitic aneurysm
What are the small strongyles known as?
Cythostomes
What are the four genera of small strongyles?
Triodontophorus, Gyalocephalus, Cylicodontophorus, Cylicocyclus
What are the nodular worms known as?
Oesophagostomum
Which species is known as the large mouthed bowel worm?
Chabertia ovina
What is the final host and predilection site of Chabertia ovina?
Sheep and goat, colon
Where are Strongylus spp mainly found in animals?
Cecum and colon of horses
What are the three genera of Strongylidae?
Strongylus, Oesophagostomum, Chabertia
Identify at least four effects of Strongylus spp.
Verminous arteritis, aneurysm, organ infarction, thromboembolic colic
What type of drugs are used for control and treatment of Strongylus spp?
Antithrombotic drugs
What is a significant effect of wormy horses or small strongyles, particularly Triodontophorus spp?
Cyathostomiasis
Which species can suck up to 10 ml of blood per day?
Strongylus equinus
Which species are known as the nodular worm of pigs and ruminants?
Oesophagostomum
What lesions do Oesophagostomum cause that interfere with absorption and bowel movement?
Pimply gut
Which larval stage of small strongyles causes nodule formation?
L4 and L5
What is the predilection site of Chabertia ovina?
Colon
Which species are known as the plug feeders causing ulcers?
Strongylidae
Which larval stage of C. ovina ingests plugs of mucosa and causes hemorrhage?
L5
What is known as the kidney worm of pigs?
Stephanurus dentatus
In which tissues is S. dentatus found?
Kidney, perirenal tissue
What is the intermediate or paratenic host of S. dentatus?
Earthworm
What is the mode of transmission of S. dentatus?
Ingestion, skin penetration, prenatal
Describe the morphological characteristics of S. dentatus.
Cup shaped buccal capsule, large and stout worm, pinkish when fresh
Which larval stage of S. dentatus causes cirrhosis and ascites in infected animals?
L4
Which species are known as the gapeworm of poultry?
Syngamus trachea
What is the pathogenesis of small strongyles?
Cyathostomiasis
Which species are the plug feeders causing ulcers?
Strongylus
Which species are controlled through the gilts only scheme?
Stephanurus dentatus
What is the predilection site of nodular worms?
Small and large intestines
Which larval stages are most involved in nodule formation?
L4 and L5
In which animals are gapeworms found and what are the affecting sites?
Non aquatic birds, trachea
What are the nodular worms affecting small ruminants?
Oesophagostomum radiatum
Describe the shape of the buccal capsule of nodular worms.
Cylindrical and narrow
Describe the buccal capsule and leaf crown of Chabertia ovina.
Bell shaped buccal capsule, has double row of leaf crowns
Which species are permanently in copula forming a Y shape?
Syngamus trachea
What are the affected sites of the kidney worm of pigs?
Ureter, kidney, renal pelvis, perirenal fat
Which species have well developed epaulletes?
Stephanurus dentatus
What are the nodular worms of cattle, buffalo, zebu, and wild large ruminants?
Oesophagostomum radiatum
Which of the nodular worms do not cause nodule formation?
Oesophagostomum venulosum
What are the nodular worms of the Philippine monkey?
Oesophagostomum longicaudum
What are the nodular worms of gorillas, chimpanzees, and other monkeys?
O. stephanostomum
Which species cause tracheitis?
Syngamus trachea
What is known as the gapeworm of anseriform birds?
Cyathostoma bronchiale
Which species are erratic parasites in the liver and other abdominal and thoracic organs?
Stephanurus dentatus
Describe the morphology of S. dentatus based on their buccal capsule, vulva, leaf crowns, and body.
Cup shaped buccal capsule, vulva near the anus, has epaulettes, large and stout, pinkish
Other strongyloids present in primates
Macropicola, Hypodontus
Other strongyloids present in Ostriches
Codiostomum struthionis
