Exam 1

Question 1

Type I Ostertagia ostertagi
Season?
Age affected?
Emergence?
When do they emerge?

Answer 1

Summer
Calves
slow emergence
emerge during 1st grazing period

Question 2

Type II Ostertagia ostertagi
Season?
Age affected?
Emergence?
When do they emerge?

Answer 2

Winter
Yearlings
Synchronized emergence
emerge after 1st grazing period

Question 3

You go to a farm where you see cows displaying clinical signs of diarrhea, bottle jaw, and weight loss. It is February and the cows affected were born the year before. You perform a McMaster and find strongylid type eggs. You perform a necropsy and find Moroccan leather in the abomasum. What parasite are you dealing with?

Answer 3

Type II ostertagia ostertagi

Question 4

You go to a farm where you see sheep and goats that show clinical signs of intermittent diarrhea and weight loss. You perform a McMaster where you find strongylid type eggs. What parasite are you likely dealing with and what part of the stomach does it affect?

Answer 4

Teladorsagia circumcincta; affects gastric glands of the stomach

Question 5

Which two parasites are associated with poor sow syndrome?

Answer 5

Hyostrongylus rubidis and oesophagostomum

Question 6

What age group are you concerned about becoming infected with toxocara (roundworms) and why?

Answer 6

young (puppies and kittens); the adults are large and can cause obstruction in the small intestine

Question 7

Your patients are a litter of 3 week old puppies and their mother. The puppies present with pot bellies, diarrhea, vomiting, and a cough. The mom presents with vomiting and diarrhea which started before she got pregnant with the puppies. You perform a fecal flotation and find eggs with a thick shell and dark morula. What parasite are you dealing with and what would you suggest the owner do to prevent reinfection?

Answer 7

Toxocara canis; owner should pick up feces

Question 8

Which of the following roundworms are zoonotic and which is the most zoonotic?

a. Toxocara canis
b. Toxocara cati
c. Toxocaris leonina
d. Parascaris equorum
e. Ascaris suum
f. Baylisascari procyonis

Answer 8

a. Toxocara canis
b. Toxocara cati
c. Ascaris suum
d. Baylisascari procyonis (MOST ZOONOTIC)

Question 9

Which species of parasite has an infective L2 or L3 stage and can be seen within the egg?

Answer 9

Toxocari

Question 10

What is the common name for strongyloides?

Answer 10

Threadworms

Question 11

Which parasite is best described:
can live free in the environment
L3 stage can live in somatic tissues
adult lives in the SI but can migrate to the heart and lungs
1/3 of body is esophagus
VERY SHORT PPP
Clinical signs include uticaria

Answer 11

Strongyloides (threadworms)

Question 12

Your patient is a foal displaying frenzy, diarrhea, and enteritis. You perform a Baermann and find L1 in eggs. What parasite do you suspect?

Answer 12

Strongyloides westeri

Question 13

Which of the following strongyloides is zoonotic?

a. S. stercoralis
b. S. papillosus
c. S. ransomi
d. S. westeri

Answer 13

S. stercoralis

Question 14

Which lungworms’s L1 has a kinked tail?

Answer 14

Metastrongyloidea

Question 15

Which lungworms’s L1 has a straight tail?

Answer 15

Dictyocaulus

Question 16

Which group of parasites is the only one with an INDIRECT life cycle that we have learned about?

Answer 16

Metastrongyloidea

Question 17

Your P is a 14 year old cat who presents with a cough, bronchitis and pneumonia. What parasite could be causing this?

Answer 17

Aelurostrongylus abstrusus

Question 18

You perform a necropsy on a sheep that appears to have “leadshot” in the lungs (lesions). Which parasite is causing this?

Answer 18

Muellerius spp. (Metastrongyloidea)

Question 19

Your patient is a horse that presents with neurological signs. The horse is given time to roam freely about the property where wildlife can often be seen. What parasite would you expect?

Answer 19

Paralephostrongylus tenius; the horse (and cows) are the abberant hosts

Question 20

Which is the only metastrongyloidea witha direct life cycle? How is it transmitted?

Answer 20

Filaroides osleri; transmitted by mom dog licking her puppies

Question 21

What parasite affects both goats and sheep but is more pathogenic in goats?

Answer 21

Dictyocaulus filarial

Question 22

What parasite infects both horses and donkeys but is only pathogenic in donkeys?

Answer 22

Dictyocaulus arnfieldi

Question 23

What condition can be caused by treating dictyocaulus?

Answer 23

Prepatent parasitic bronchitis

Question 24

Which species of Dictyocaulus affects young cattle?

Answer 24

Dictyocaulus vinparous

Question 25

This parasite is the number one killer of sheep and goats due to it's resistance. It can be diagnosed with a McMaster and Famacha.

Answer 25

Haemonchus contortus

Question 26

Your patient is a cow that presents with mild clinical signs including anemia, bottle jaw, and gastritis. What parasite could this be?

Answer 26

Haemonchus placei

Question 27

In which stage and where does haemonchus arrest?

Answer 27

L4 in the abomasum

Question 28

You perform a necropsy on an older pig after suffering from anemia, diarrhea, weight loss ad green feces. There are other pigs as well as ruminants on the farm that seem to be affected. During the necropsy, you find nodules inside the large intestine. Which parasite could this be and what causes these nodules?

Answer 28

Oesophagostomum; arrested L4 causes nodules

Question 29

A horse and cow present with severe diarrhea after exhibiting signs of stress with being moved to a new barn. Which parasite could this be?

Answer 29

Trichostrongylus

Question 30

You arrive at a farm where a farmer notes he has had several lambs die. The lamb's back ends are covered in diarrhea and they have increased thirst and appear dehydrated. When you perform a McMaster, you find large eggs that appear to have "bubbles" inside and contain an L3. Which parasite is this and what is it's common name?

Answer 30

Nematodireus battus; Longneck Bankrupt Worm

Question 31

Which two parasites are often associated with clinical signs developing after stress?

Answer 31

Cooperia spp. and Trichostrongylus

Question 32

Which ancylostoma is most pathogenic and why?

Answer 32

Ancylostoma caninum; parasites have 3 pairs of teeth

Question 33

A bird presents with respiratory distress after eating an earthworm. The egg has one operculum on each side when you perform a fecal float. What parasite is this?

Answer 33

Syngamus trachea (gapeworm)

Question 34

You perform a necropsy on a bird that was presenting with respiratory distress before its death. You find red y-shaped parasites in the trachea. What parasite is this?

Answer 34

Syngamus trachea (gapeworm)

Question 35

Your patient is a young bird that presents with anorexia and diarrhea and is obstructed with parasites in the small intestine. The egg is a rounded rectangular shape with a thick shell. What parasite is this?

Answer 35

Ascaridia spp

Question 36

What parasite known as the "Poultry Cecal Worm" affects chickens and turkeys, transmits histomonas to turkeys known as black heads and has an infective stage of L2-L3?

Answer 36

Heterakis galinarum