Equine Lecture 1

Question 1

T/F Equines are host to largest collection (numbers and kinds) of parasites of domestic animals

Answer 1

T

Question 2

T/F Immune responses in horses will completely eradicate parasites of horses

Answer 2

F

Will protect but not eradicate

Question 3

T/F 80% of parasites live in 50% of horses

Answer 3

F

20% of horses

Question 4

Hairworm of horses

Answer 4

Trichostrongylus axei

Question 5

Habitat of Trichostrongylus axei

Answer 5

Stomach (lumen of glands)

Question 6

Trichostrongylus axei eggs and repro

Answer 6

Males have copulatory bursas to mate with females to make thin walled morulated egg (HW like egg)

Question 7

Life cycle of Trichostrongylus axei

Answer 7

Unemryonated eggs pass in poop

Eggs embryonate and L hatch and molt in environment

L3 migrate onto grass and are INGESTED

L3 goes to stomach and molt to L4

Enter lumen and molt to L5

Adults in gastric glands by 3 weeks of ingestion of L3

Question 8

Hyperplastic gastritis

• what
• seen with

Answer 8

-Glandular part of stomach damaged and cells try to repair over itself.

Trichostrongylus axei

Question 9

Catarrhal gastritis

• what
• seen with

Answer 9

Inflammation of stomach walls. Causes redness, necrosis, mucosal erosion, ulcers.

Trichostrongylus axei

Question 10

Hypoproteinemia

• what
• seen with

Answer 10

Protein-losing gastropathy

Trichostrongylus axei

Question 11

What species can Trichostrongylus axei be found in?

Answer 11

Stomach of

Horse

Cattle

Swine

Question 12

Pre-patent period of Trichostrongylus axei

Answer 12

3 weeks (short)

Question 13

What are the only approved treatment agents of Trichostrongylus axei

Answer 13

Ivermectin/moxidectin

Question 14

Habronema spp Draschia spp common names

Answer 14

Stomach worms

Spirurids

Question 15

Habronema spp Draschia spp habitat

Answer 15

Stomach

Question 16

Habronema spp Draschia spp life cycle

Answer 16

Adult worm makes eggs

Maggots/flies pick up larvae (INTERMEDIATE HOST)

Fly deposits larvae (via mouth) on skin of horse

Question 17

Pulmonary habronemiasis (pulmonary granulomas)
seen with

Answer 17

Habronema spp Draschia spp

Question 18

Main pathological disease with Habronema spp Draschia spp

AKA

Answer 18

Summer sores
AKA

Cutaneous habronemiasis
Granular dermatitis
Ocular habronemiasis

Question 19

Self mutilation seen with

Answer 19

Summer sores
Habronema spp Draschia spp

necrosis and calcification of 3rd stage larva

Question 20

Draschia megastoma habitat

Answer 20

Nodules in stomach

Question 21

Larvae or adults more harmful Habronema spp Draschia spp

Answer 21

Larvae

Question 22

Do you see ascarids in adults or young animals

Answer 22

Young

Question 23

Ascarids habitat and seen

Answer 23

Small intestine

Worldwide

Question 24

Parascaris quorum habitat

Answer 24

SI

Question 25

Parascaris quorum larvae involved with

Answer 25

hepatotracheal migration

–>Summer colds

Question 26

T/F Parascaris quorum passed transplcentally

Answer 26

F

Question 27

Does Parascaris quorum use IM host?

Answer 27

No

Question 28

Intestinal threadworm of horses

Answer 28

Strongyloides westeri

Question 29

Strongyloides westeri habitat

Answer 29

SI of horse, donkey, pig

Question 30

Strongyloides westeri pathogenic in intestine

Answer 30

Entwines in mucosa

Question 31

Strongyloides westeri homogonic and heterogonic cyle

Answer 31

Homogonic-L penetrate skin or ingested in milk/colostrum

Hetergonic-L are free living in environment

Question 32

Foal Heat diarrhea
what
cause

Answer 32

Strongyloides westeri

Caused by increased fiber and changes in intestinal flora

Question 33

Large equine pinworm

Answer 33

Oxyuris equi

Question 34

Oxyuris equi habitat

Answer 34

LI

Question 35

Oxyuris equi lifecycle

Answer 35

Eggs ingested

Question 36

Oxyuris equi pathology

Answer 36

Pruritis ani

Seat Itch