Exam I - Oslerus osleri

Question 1

What is the common name for Oslerus osleri?

Answer 1

tracheal worm

Question 2

To which taxonomic superfamily does Oslerus osleri belong?

Answer 2

Metastrongyloidea

Question 3

What is/are the final host(s) for Oslerus osleri?

Answer 3

Dogs and wild carnivores

Question 4

What is/are the intermediate host(s) for Oslerus osleri?

Answer 4

Trick question, biatch! This metastrongyloid does not utilize an intermediate host.

Question 5

Desribe the life cycle for Oslerus osleri.

Answer 5

• Infective L₁ ingested and all stages develop in lungs.
• Female lays eggs containing larvae that hatch before being expelled in sputum, or coughed up, swallowed and passed in feces.
• Infection is through ingestion of regurgitated stomach contents, lung tissue or feces of infected dogs.
• PPP is 10-18 wk.

Question 6

How long is the PPP for Oslerus osleri?

Answer 6

10-18 weeks

Question 7

What are the sites of infection for Oslerus osleri?

Answer 7

Nodules with nematodes in the trachea at the region of bifurcation, in adjacent bronchi or deeper in the lungs.

Question 8

What are some clinical signs associated with Oslerus osleri?

Answer 8

Asymptomatic unless heavy infection

Then tachypeana (increased rate of respiration) is observed