Quiz 7

Question 1

Who is the host for Strongylus vulgaris

Answer 1

Horse

Question 2

What does the worm Strongylus vulgaris look like?

Answer 2

Bard red with a large buccal capsule

Question 3

What is the agent of Acute Verminous Arteritis?

Answer 3

Strongylus vulgaris

Question 4

Life cycle of S vulgaris

Answer 4

Direct

Eggs passed in feces
L1-L3 in environment

Horse ingests L3
L3 penetrates mucosa of cecum/colon
L3-L4 in cecum/colon
L4 migrates through the mesenteric arteries
Molt to Immature adults-migrate to intestinal wall to develop into the adult

Question 5

What causes aneurysms, thromboembolisms, intestinal infarctions?

Answer 5

S vulgaris

Acute Verminous Arteritis

Question 6

How can you diagnose S vulgaris?

Answer 6

ELISA

Question 7

What CS will you see with a S vulgaris infection?

Answer 7

acute colic and diarrhea

Question 8

What is the primary parasitic pathogen of horses?

Answer 8

Cyanthostomes

Question 9

What do you need to remember about the weather and Cyanthostomes

Answer 9

Resistant to colder weather

Question 10

Life cycle of Cyanthostomes

Answer 10

Direct, non-migratory

Eggs in feces
L1-L3
L3 ingested and penetrate colonic and cecal mucosa
L3 to L4 and encysts (hypobiosis)
L4 remerges in the spring to the surface of the mucosa and molts into adults

Question 11

What CS are you gonna see with larval cyanthostomiasis?

Answer 11

Colic

Question 12

When you have thousands of L4 remerging at the same time what CS will you see for cyanthostomiasis?

Answer 12

PLN

Question 13

How can you diagnose Cyanthostomes?

Answer 13

Larvae seen on a rectal palpation sleeve
CS and PCR

NO FECAL FLOAT

Question 14

Why can you not see eggs on a fecal float when you see CS?

Answer 14

The CS occur onces the L4 have re-emerged. There are no eggs at this life stage

Question 15

What parasite is common in the adult pig?

Answer 15

Oesophagostomum

Question 16

Where is the oesophagostomum found in the body?

Answer 16

Lumen and SI

Question 17

What parasite causes thin sow syndrome?

Answer 17

Oesophagostomum

Question 18

Life Cycle of oesophagostomum

Answer 18

unebryonated eggs in feces
L1-L3 in enivronment
L3 ingested and encysts in/on intestinal wall
develop to L4
L4 re-emerges in 2wks-2mo and develops to adult

Question 19

CS of Oesophagostomum

Answer 19

Catarrhal enteritis
Stunted growth
Nodules caseate and calcify

Question 20

Dx of oesophagostomum

Answer 20

CS or post mortum

Question 21

What parasite is found in cysts in the perirenal fat and the pelvis of the kidney in swine?

Answer 21

Stephanurus dentatus

Question 22

What do the worms of S dentatus look like?

Answer 22

Mottled appearance

Question 23

What kind of pig does S dentatus infect?

Answer 23

older pigs that are housed outdoors

Question 24

Is S dentatus sensitive to the cold?

Answer 24

YES, free living larvae are killed by cold temps

Question 25

Life Cycle of S dentatus

Answer 25

Eggs passed in URINE Larvae in environment for several months Larvae ingested by pigs OR penetrate skin of PH (earthworm)--L3 Larvae migrate from intestine to liver to retroperitoneal tissue surrounding kidney Eggs in 9-16 months and can persist for 3 yrs Transplacental transmission also possible

Question 26

What is the primary pathology of s dentatus?

Answer 26

liver damage from migration. Milk Spots

Question 27

What is a common CS of S dentatus

Answer 27

Failure to thrive Weight loss emaciation

Question 28

What other CS can be caused by S dentatus?

Answer 28

Paralysis--migration to spinal cord

Question 29

What is the scientific name for the grape worm?

Answer 29

Syngamus Trachea

Question 30

Who is the DH for Syngamus trachea?

Answer 30

Birds

Question 31

Who is the PH for Syngamus trachea?

Answer 31

what do birds eat? Earthworms

Question 32

Life Cycle of Syngamus trachea

Answer 32

Direct | ingestion of egg for earthworm containing L3

Question 33

How do the adult Syngamus trachea look?

Answer 33

copula forming a Y shape

Question 34

CS of Syngamus trachea

Answer 34

Dyspnea, suffocation, gaping mouth, extended neck Death

Question 35

Dx of Syngamus trachea?

Answer 35

eggs with bipolar plugs in FF

Question 36

What adult parasites are thin, reddish brown worms?

Answer 36

Ostertagia

Question 37

Who are the DH for ostertagia? | What is the other name for this

Answer 37

Cattle Western Stomach worm

Question 38

LC of Ostertagia

Answer 38

Direct, non-migratory Eggs in feces Larvae to L3 on ground DH ingests L3 Penetrate the gastric glands and molts in L4 Immature adults emerge onto mucosal surface and mature

Question 39

What are the 2 types of Ostertagia?

Answer 39

T1: Summer Weanling calves in first grazing session Diarrhea and weight loss Lots of eggs and adult worms in feces T2: Winter Rapid emergence of hypobiotic larvae in yearling calves Few eggs/adults in feces High mortality, anemia, hypoproteinemia, emaciation, bottle jaw

Question 40

What is the scientific name for the barber pole worm? Why is it called this?

Answer 40

Haemonchus Females look like barber poles-their uterus/ovaries wind around blood filled gut

Question 41

DH of Haemonchus

Answer 41

Sheep and cattle

Question 42

LC of Haemonchus

Answer 42

Direct, non-migratory L3 ingested Penetrate gastic epithelium of abomasum--L4--immature adult--re-emerge, mature to adult Hypobiosis-"overwinter" and re-emerge in favorable conditions

Question 43

Will you see eggs during the hypobiosis phase?

Answer 43

NO

Question 44

Why will you see a periparturient rise in haemonchus?

Answer 44

Ewes at lambing-rapid pasture contamination

Question 45

When will you see anemia with haemonchus?

Answer 45

Acute with 10,000 worms

Question 46

What form is the most common form of Haemonchus?

Answer 46

Chronic-little or no anemia

Question 47

How do you Dx haemonchus?

Answer 47

FAMACHA, | FF

Question 48

What does Refugia mean?

Answer 48

Proportion of worm population that is not selected by drug treatment bc of selective tx rather than treating the whole herd

Question 49

Why do we think this selective tx works for resistance?

Answer 49

Resistant worms from treated population will be diluted by non-resistant worms from untreated populations

Question 50

Nematodirus DH?

Answer 50

Cattle and sheep

Question 51

LC of Nematodirus

Answer 51

Direct-L3 infective stage

Question 52

CS of Nematodiurs

Answer 52

Acute Diarrhea in young, could be fatal

Question 53

Dx of Nematodirus

Answer 53

LARGE eggs on FF or adult worms at necropsy

Question 54

Cooperia DH?

Answer 54

Cattle, sheep, goats

Question 55

LC

Answer 55

same as other L3 infective | Adults are in SI

Question 56

CS fo Cooperia

Answer 56

Diarrhea, anorexia, depressed growth

Question 57

Dx of Cooperia

Answer 57

Eggs in FF or adults at necropsy

Question 58

Trichostrongylus axei DH?

Answer 58

Cattle sheep goats-maybe horses

Question 59

CS fo Trichostrongylus axei

Answer 59

Gastroenteritis in young

Question 60

You are on a farm and multiple spp of animals are sick, what parasit could this be?

Answer 60

Trichostrongylus axei they can cross infect

Question 61

Hyostrongylus DH

Answer 61

Swine

Question 62

LC fo Hyostrongylus

Answer 62

Direct, no migration | Larvae molt in the gastric mucosa in nodules

Question 63

CS of hyostrongylus

Answer 63

Anemia, poor appetite, melena Nodules in gastric mucosa Hemorrhagic gastritis

Question 64

Dx Hyostrongylus

Answer 64

Strongyle type egg or necropsy