Superfamily Metastrongyloidea Flashcards
(26 cards)
What is the super family name for Oslerus Osleri?
Metastrongyloidea
What is the common name for Oslerus Osleri?
Tracheal Worm
What are the hosts for Oslerus Osleri?
Dogs and Wild carnivores
What are the characteristic features of Oslerus Osleri?
Hair-like, small, and not recovered intact from tissues. A squeeze preparation is used. L1 present in feces or sputum. Larva has kinked tail.
Describe the life cycle of Oslerus Osleri
Infected L1 is ingested and all stages develop in lungs -> female lay eggs containing larva that hatch before being coughed up, swallowed, and passed in feces -> infection is through regurgitated stomach contents, lung tissue, or feces of infected dogs. PPP is 10-18 weeks.
Female Oslerus Osleri are known as ovoviviparous, what does this mean?
Females contain a definite worm that is readily infective towards next recipient once it leaves the host.
Where are the sites of infection of Oslerus Osleri?
Trachea, bronchi, and lung parenchyma
What are the pathogenesis and lesions of Oslerus Osleri?
Millet seed nodules, with heavy infections greyish masses of many nodules observed.
What are the clinical signs for Oslerus Osleri?
Asymptomatic unless heavy infection
What the hell is going on in this image?
Parasitic granulomas of the trachea due to Oslerus Osleri infection
What can you depict from this image?
Nodules in trachea and bronchi from Oslerus Osleri infection.
How is Oslerus Osleri diagnosed?
Nodules are detected with a bronchoscope. L1 with kinked tail in feces or sputum, centrifugal flotation or with baermann technique.
What is the treatment and prevention for Oslerus Osleri?
Persistent problems in kennels, Benzimidazoles may help with treatment.
What can you distinguish from this neat image?
Oslerus larvae because of its kinked tail feature
What is the super family name for Aelurostrongylus Abstrusus?
Metastrongyloidea
What is the common name for Aelurostrongylus Abstrusus?
Cat lungworm
What are the hosts of Aelurostrongylus Abstrusus?
Final hosts are cats, intermediate hosts are snails and slugs, paratenic hosts are birds, rodents, and frogs
What are some characteristic features of Aelurostrongylus Abstrusus?
Adults are 1 cm in length, L1 with kinked tail present in feces, aggregations of parasites in lung tissue.
What parasitic species does this larvae belong to?
Aelurostrongylus Abstrusus
Describe the life cycle of Aelurostrongylus Abstrusus.
L3 is infective stage -> L3 is ingested and migrate to the lungs -> female adults lay eggs in “nests” in lung parenchyma (appear as grey nodules) -> L1 hatch, coughed up, swallowed, and passed into feces -> L1 ingested by intermediate host (molluscs) and develop to L3 -> Paratenic host eat intermediate host -> Either host is ingested by cat
Where is the site of infection for Aelurostrongylus Abtrusus?
Lung parenchyma and bronchioles
What is the pathogenesis for Aelurostrongylus Abstrusus?
There is low pathogenicity as majority of infections are discovered incidentally at necropsy.
What are the clinical signs for Aelurostrongylus Abstrusus infection?
Chronic mild cough
How is Aelurostrongylus Abstrusus diagnosed?
Widespread because it develops in such a wide range of slugs and snails. Fecal examination by smear, flotation or Baermann method which reveals kinked tail L1
