Parasitology

Question 1

Round worm lifecycle

Answer 1

Egg
Egg with L1
Egg with L2
(Sometimes L3)
Ingestion
Migrate through tissues
Become adults
Excreted

Question 2

Strongyloides westeri facts

Answer 2

Can be transmitted directly to foal (in milk)
Can be free living adults outside host (heterogonic cycle)

Question 3

Dictyocaulus arnfieldi facts

Answer 3

Likes to go to lungs
Donkeys are the host

Question 4

Tapeworm lifestyle

Answer 4

Eggs excreted
Mites ingest eggs
Develop in mites
Consumption
Become adults in horse
No migration in tissues

Question 5

Facts about gasterophilus

Answer 5

Adult is a fly
Lays eggs on hairs of horses legs, horse licks/bites legs
Larvae go into stomach, live there in winter
Larvae excreted

Question 6

What causes the most damage

Answer 6

Migrating larvae (roundworm)

Question 7

Adults in intestines may cause…

Answer 7

Obstruction

Question 8

When should you deworm a horse

Answer 8

200-250 eggs per gram of feces

Question 9

What is the fecal egg count reduction test (FECR)

Answer 9

Check for drug-resistant parasites
1. Do a FEC
2. Deworm
3. Wait a week or two
4. Do another FEC
Should find 90% reduction in eggs

Question 10

Test to check for drug resistant parasites

Answer 10

Fecal egg count reduction test

Question 11

External parasites e.g.

Answer 11

Mites
Lice
Ticks
Biting flies

Question 12

Infestation vs infection

Answer 12

Infection = internal parasites
Infestation = external