Filaroides (Oslerus) osleri (2)

Question 1

What are the hosts?

Answer 1

Dogs and wild carnivores

Question 2

Describe an adult

Answer 2

Small, hairlike, grayish

Tracheobronchial nodules

Concentrated around Tracheobronchial bifurcation

Question 3

Describe the larvae

Answer 3

Found in feces or sputum

Kinked tail

Diagnostic and infective - Bitch gives to puppy while cleaning the
puppies
Squeeze preparation

Question 4

Explain the life cycle

Answer 4

L1 ingested - develop in lungs

Female lays eggs with larvae

L1 hatch, expelled in sputum or coughed up, swallowed, pass in feces

Infection by ingestion of regurgitated stomach contents, lung tissue or feces of infected dogs

PPP: 10-18 weeks
     - Long
     - Clinical signs won't show up until after puppies have been 
        purchased or adopted
     - Big problem for breeders

Question 5

What are the sites of infection?

Answer 5

Trachea

Bronchi

Lung parenchyma

Question 6

Describe the Pathogenesis

Answer 6

Millet seed nodules

Heavy infections - grayish masses of many nodules observed

Symptomatic if heavy infection

Bitch to pups

Can damage reputation of a breeder

Question 7

How do you diagnose?

Answer 7

Nodules detected with a bronchoscope

L1 with kinked tail in feces or sputum, centrifugal flotation or with Baermann technique

Question 8

How do you treat and prevent?

Answer 8

Persistent problems in kennels

Benzimidazoles reduce levels? - no confirmatory studies to prove that it
is effective

Question 9

What is the common name?

Answer 9

Tracheal Worm