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Parasitology > Superfamily Metastrongyloidea > Flashcards

Superfamily Metastrongyloidea Flashcards

1
Q

What is the super family name for Oslerus Osleri?

A

Metastrongyloidea

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2
Q

What is the common name for Oslerus Osleri?

A

Tracheal Worm

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3
Q

What are the hosts for Oslerus Osleri?

A

Dogs and Wild carnivores

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4
Q

What are the characteristic features of Oslerus Osleri?

A

Hair-like, small, and not recovered intact from tissues. A squeeze preparation is used. L1 present in feces or sputum. Larva has kinked tail.

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5
Q

Describe the life cycle of Oslerus Osleri

A

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.

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6
Q

Female Oslerus Osleri are known as ovoviviparous, what does this mean?

A

Females contain a definite worm that is readily infective towards next recipient once it leaves the host.

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7
Q

Where are the sites of infection of Oslerus Osleri?

A

Trachea, bronchi, and lung parenchyma

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8
Q

What are the pathogenesis and lesions of Oslerus Osleri?

A

Millet seed nodules, with heavy infections greyish masses of many nodules observed.

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9
Q

What are the clinical signs for Oslerus Osleri?

A

Asymptomatic unless heavy infection

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10
Q

What the hell is going on in this image?

A

Parasitic granulomas of the trachea due to Oslerus Osleri infection

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11
Q

What can you depict from this image?

A

Nodules in trachea and bronchi from Oslerus Osleri infection.

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12
Q

How is Oslerus Osleri diagnosed?

A

Nodules are detected with a bronchoscope. L1 with kinked tail in feces or sputum, centrifugal flotation or with baermann technique.

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13
Q

What is the treatment and prevention for Oslerus Osleri?

A

Persistent problems in kennels, Benzimidazoles may help with treatment.

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14
Q

What can you distinguish from this neat image?

A

Oslerus larvae because of its kinked tail feature

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15
Q

What is the super family name for Aelurostrongylus Abstrusus?

A

Metastrongyloidea

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16
Q

What is the common name for Aelurostrongylus Abstrusus?

A

Cat lungworm

17
Q

What are the hosts of Aelurostrongylus Abstrusus?

A

Final hosts are cats, intermediate hosts are snails and slugs, paratenic hosts are birds, rodents, and frogs

18
Q

What are some characteristic features of Aelurostrongylus Abstrusus?

A

Adults are 1 cm in length, L1 with kinked tail present in feces, aggregations of parasites in lung tissue.

19
Q

What parasitic species does this larvae belong to?

A

Aelurostrongylus Abstrusus

20
Q

Describe the life cycle of Aelurostrongylus Abstrusus.

A

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

21
Q

Where is the site of infection for Aelurostrongylus Abtrusus?

A

Lung parenchyma and bronchioles

22
Q

What is the pathogenesis for Aelurostrongylus Abstrusus?

A

There is low pathogenicity as majority of infections are discovered incidentally at necropsy.

23
Q

What are the clinical signs for Aelurostrongylus Abstrusus infection?

A

Chronic mild cough

24
Q

How is Aelurostrongylus Abstrusus diagnosed?

A

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

25
Q

What is the name of Jonathan’s favorite cocktail as seen in this image?

A

Baermann technique

26
Q

What is the treatment and prevention for Aelurostrongylus Abstrusus?

A

Two remedies used: Prevent access to intermediate or paratenic host

Parasitology (11 decks)

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