Respiratory parasites

Question 1

What is canine tongue worm

Answer 1

Linguatla serrata

Question 2

Describe the life cycle of linguatla serrata (canine tongue worm)

Answer 2

1. Eggs on pasture/ water and is injested by intermediate host (ruminant)
2. Eggs hatch in intestine and larvae migrate to organs
3. Dog eats infected raw meat from the intermediate host
4. Adult stages develop i dogs nasal passage- expels eggs via nasal discharge

Question 3

What is oestrus ovis

Answer 3

Sheep/goat nasal bot fly

Question 4

Describe the life cycle of oestrus ovis

Answer 4

1. Fly deposits L1 into nasal passage of sheep/goat
2. Larvae mature in the nose and sinuses to L3
3. Are sneezed out and pupate on ground

Question 5

What are the clinical signs of Oestrus ovis

Answer 5

Avoidance behavior
Excess nasal discharge
Labored breathing
Loss of appetite

Question 6

Why is oestrus ovis important in agriculture

Answer 6

Economic importance in many countries not considered high e.g. high morbidity / low mortality

Question 7

What is nasal myiasis

Answer 7

Infestation by a parasite which feeds on the membranes in nasal cavity/sinuses

Question 8

What is dog nasal mite

Answer 8

Pneumonyssus caninum

Question 9

Gapeworm in birds

Answer 9

Syngamus trachea

Question 10

In what species is syngamus trachea economically important

Answer 10

Turkey
Chicken
Pheasant
Non-aquatic birds

Question 11

Describe the life cycle of Syngamus trachea (birds)

Answer 11

1. Ingestion of egg/ hatched L3/ paratenic host (earthworm)
2. L1-L3 maturation occurs inside egg shelll
3. L3 migrates from duodenum to liver to lungs
4. Eggs formed in trachea

Question 12

What are the clinical signs of syngasmus trachea

Answer 12

Gaping- open mouth wide and extends neck

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