Exam II - Dictyocaulus arnfieldi Flashcards Preview

RUSVM Parasitology > Exam II - Dictyocaulus arnfieldi > Flashcards

Flashcards in Exam II - Dictyocaulus arnfieldi Deck (9)
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1
Q

What is the common name for Dictyocaulus arnfieldi?

A

Lungworm

2
Q

What is/are the host(s) for Dictyocaulus arnfieldi?

A

Donkeys. In horses, adults usually don’t reach sexually maturity.

Score 1 for donkeys

3
Q

Which life cycle stages of Dictyocaulus arnfieldi are recovered in feces and bronchial washings?

A

L1 (400 um long) and eggs (75 um long)

4
Q

Describe the appearance of Dictyocaulus arnfieldi adults

A

Long white nematodes (8 cm) in lungs

5
Q

Describe the Dictyocaulus arnfieldi life cycle

A

Direct. Adult stages in bronchi lay eggs containing L1.

Eggs hatch in lungs and in feces (eggs & L1 are found in feces)

Develop to L3, migrate from feces to herbage where ingested

PPP is 2-4 months

6
Q

Describe any pathogenesis and clinical signs associated with Dictyocaulus arnfieldi in horses and donkeys

A

Horses: damage to pulmonary tissue, chronic, productive cough

Donkeys: no clinical signs

7
Q

How would you diagnose Dictyocaulus arnfieldi?

A

L1 recovered in fresh feces and lung washings

Adults in lungs at necropsy

8
Q

What are some treatment & prevention options for Dictyocaulus arnfieldi?

A

In endemic areas, don’t pasture horses & donkeys together

9
Q

What is the infective stage of Dictyocaulus arnfieldi?

A

L3

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