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Flashcards in Nematodes Deck (29)
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1

A litter of 2-week-old puppies presents with acute lethargy. On PE the puppies are moribund, cold, and have markedly pale mucous membranes. You suspect acute anemia due to hookworm infection. The next step in managing these puppies is:

A. Prophylactically deworm with pyrantel pamoate
B. Perform a fecal flotation and only deworm if eggs are detected
C. Perform CBC, serum chemistry, U/A, and abdominal radiographs on each pup
D. Hold for quiet observation for 48 hours to monitor progression of disease
E. Bathe each puppy to insure ectoparasites are eliminated

A. Prophylactically deworm with pyrantel pamoate

2

A mixed breed dog is housed outdoors on soil in a run presents with lesions on its ventral and dorsal surfaces of all four feet, sternum, and ventral abdomen. The areas are erythematous, thickened, and alopecic. The owner informs you that ever since the dog was adopted 2 years ago from a neighbor, the dog only had yearly routine vaccinations (Rabies, DA2PP). The organism responsible for these lesions is most likely:

A. Aelurostrongylus abstrusus
B. Ancylostoma tubaeforma
C. Protostrongylus rufescens
D. Ancylostoma caninum
E. Bunostomum phlebotomum

D. Ancylostoma caninum

3

Concerning larval cyathostomiasis, which statement is least accurate?

A. Larval cyathostomiasis is most common in young horses but can occur in horses of all ages

B. Clinical signs of cyathostomiasis may include diarrhea, colic, weight loss, dependent edema, and delayed shedding of the winter hair coat

C. The disease is seasonal and associated with emergence of larvae from the gut wall after hypobiosis

D. Adult cyathostomiasis does not usually cause diarrhea but can contribute to protein-losing enteropathy

E. Ivermectin and some Benzimidazole dewormers are the only Anthelmintics effective against 3rd stage larvae encysted in the gut wall

E. Ivermectin and some Benzimidazole dewormers are the only Anthelmintics effective against 3rd stage larvae encysted in the gut wall

4

In horses, the larvae of Strongylus vulgaris are the pathogenic stage of this parasite. Damage is caused by migration of larvae within the:

A. Bile canaliculi of the liver
B. Islet cells of the pancreas
C. Intima of the cranial mesenteric arteries
D. Lymphatic vessels in the small intestine wall
E. Meninges of the spinal cord

C. Intima of the cranial mesenteric arteries

5

The prepatent period of Strongylus vulgaris is:

A. 2 weeks
B. 1 month
C. 2 months
D. 4 months
E. 6 months

E. 6 months

6

A 2 year old heifer is presented who died the night before. She was stunted compared to her herd mates, and had a 3-week history of poor appetite, unthriftiness, diarrhea. Necropsy reveals that the abomasum is edematous and covered in small umbilicated nodules 1-2 mm in diameter (cobblestone or "Moroccan leather" appearance). Several other young cows in this spring-calving herd look unthrifty and have diarrhea too. What is the plan of action?

A. Deworm cows post-calving, calves by midsummer, all stock in fall
B. Treat affected heifers with Ivermectin, repeat in 6 months
C. Treat affected heifers with Albendazole
D. Treat herd with Amprolium, repeat in 5 weeks
E. Cull sick cows, keep horses off same pasture 3 months

A. Deworm cows post-calving, calves by midsummer, all stock in fall.

7

In calf that died of severe diarrhea associated with high serum pepsinogen levels, necropsy reveals the rumen, reticulum, and omasum to be full of feed, while the remainder of the alimentary tract is virtually empty. The mucosa of the abomasum is covered with gray-white, 3-5 mm nodules, each of which contains a small worm. The parasite responsible for this type of lesion in cattle is:

A. Haemonchus placiei
B. Trichostrongylus axei
C. Ostertagia ostertagi
D. Nematodirus helvetianus
E. Bunostomum phlebotomum

C. Ostertagia ostertagi

8

A calf develops dark, watery diarrhea; no parasite eggs are noted in feces. Necropsy reveals small, caseous nodules in the wall of the small intestine. Each nodule contains a worm or a decaying worm. Living worms have a large buccal capsule. The worms causing this disease are most likely:

A. Oesophagostomum radiatum
B. Bunostomum phlebotomum
C. Haemonchus placiei
D. Strongyloides papillosus
E. Dictyocaulus viviparous

A. Oesophagostomum radiatum

9

Young beef cattle in Mississippi develop anemia and anasarca during a wet period of the summer. None of the animals shows any signs of diarrhea and some seem constipated. One animal dies and necropsy reveals numerous red and white worms, 20-30 mm long, within the abomasum. The worm most likely responsible for the disease in these cattle is:

A. Haemonchus placiei
B. Trichostrongylus axei
C. Ostertagia ostertagi
D. Nematodirus helvetianus
E. Bunostomum phlebotomum

A. Haemonchus placiei

10

Trichostrongyles parasitizing cattle can be identified by the stages passed in the feces using:

A. Careful measurement of the eggs
B. Microscopic examination of 1st stage larvae grown in culture
C. Microscopic examination of infective larvae grown in culture
D. Microscopic examination of the ornamentation of the egg shells
E. Microscopic examination of the larva within the egg shell

C. Microscopic examination of infective larvae grown in culture

11

A client brought in these nematodes after his 6-year-old spayed female indoor/outdoor cat vomited them onto the kitchen floor this morning. How did the cat most likely become infected?

A. Transplacental transmission from the queen as a kitten
B. Transmammary transmission from the queen as a kitten
C. Ingestion of an insect intermediate host or vertebrate Paratenic host
D. Ingestion of larvated egg from the environment
E. Ingestion of the L3 from the vomit of another cat

D. Ingestion of larvated egg from the environment

12

A 5-month-old spaniel puppy vomits a mass of thick stout white nematodes. On close inspection, you note the presence of three lips at the anterior end of each of the worms. What parasite is this most likely to be?

A. Toxocara canis
B. Toxocara cati
C. Toxascaris leonina
D. Ancylostoma caninum
E. Trichuris vulpis

A. Toxocara canis

13

The most like cause of death in Ancylostoma caninum-infected puppies that die of Peracute hookworm disease during the second week of life is:

A. Renal Failure
B. Diarrhea
C. Anemia
D. Pneumonia
E. Hepatic Failure

C. Anemia

14

I have a young puppy with a severe anemia, which is the most likely cause?

A. Ancylostoma caninum
B. Ancylostoma braziliense
C. Uncinaria stenocephala
D. Filaroides osleri

A. Ancylostoma caninum

15

Your client brings in a weaned puppy that she bought from the breeder a few weeks ago. She is very upset because now it has a cough and she wants to know how the puppy got sick. Based on this information how was the puppy probably infected?

A. Via the L3 directly from the bitches feces
B. Via the L1 in the sputum of the bitch
C. L2 or L3 within the egg
D. L4 from the environment
E. All of the above

B. Via the L1 in the sputum of the bitch

16

Your friend is complaining about the stray cats that are defecating in her garden, what zoonosis should you warn her about?

A. Cutaneous larval migrans from Ancylostoma braziliense
B. Pneumonia from Aelurostrongylus abstrusus
C. Diarrhea from Ancylostoma braziliense
D. All of the above
E. None of the above

A. Cutaneous larval migrans from Ancylostoma braziliense

17

What diagnostic method would you perform first if your goat has a cough?

A. Baermann
B. Fecal float
C. Fecal sedimentation
D. McMaster
E. None of the above

A. Baermann

18

All of these are a zoonotic threat except:

A. Toxocara cati
B. Ancylostoma braziliense
C. Ascaridia dissimilis
D. Strongyloides stercoralis

C. Ascaridia dissimilis

19

How would a small child develop ocular larval migrans?

A. Walking barefoot and the larva enter Percutaneously
B. By ingesting the eggs from fresh feces
C. By ingesting eggs from aged feces
D. By an infected puppy licking their child's face and transmitting the larva

B. By ingesting the eggs from fresh feces

20

A 3 week old puppy presents to your clinic. All of the following parasites could afflict a puppy this old except:

A. Toxocara canis
B. Ancylostoma caninum
C. Strongyloides stercoralis
D. All of the above are possible

D. All of the above are possible

21

What are the cat specific parasite?

A. Cooperia spp.
B. Toxascaris leonina
C. Ancylostoma tubaeforma
D. Aelurostrongylus abstrusus

C. Ancylostoma tubaeforma
D. Aelurostrongylus abstrusus

22

For many parasitic infections if the host can survive and reach adulthood they are solidly immune. Which parasite(s) does this apply to?

A. Ostertagia ostertagi
B. Strongyloides ransomi
C. Cooperia spp.
D. Oesophagostomum spp.

A. Ostertagia ostertagi
B. Strongyloides ransomi

23

Which pair is incorrectly matched?

A. Metastrongylus = Fecal Float
B. Strongyloides westeri = Baermann
C. Uncinaria stenocephala = Larval Culture
D. All of the above are correct

D. All of the above are correct

24

The following parasites can all be diagnosed by doing a fecal float analysis that produces Strongyle type eggs except:

A. Strongylus edentatus
B. Hyostrongylus
C. Strongyloides ransomi
D. Teladorsagia circumcincta

C. Strongyloides ransomi

25

Which of the following sets of clinical signs in a calf would be associated with a Type I Ostertagia infection?

A. Liquid diarrhea, gastritis, anemia
B. Weight loss, loose stools, failure to thrive
C. Green diarrhea, dehydration, failure to thrive

B. Weight loss, loose stools, failure to thrive

26

You are called to a goat farm. The owner is concerned about some unusual behavior he has seen in his flock. Large numbers of kids are congregating around the watering hole. One has died and appears in poor BCS and dehydrated. What is at the top of your differential?

A. Nodular Pimply Worm
B. Brown Stomach Worm
C. Long Neck Bankrupt Worm
D. Barber pole worm

C. Long Neck Bankrupt Worm

27

Your client just moved into a new house with her puppy. Apparently the previous owners left some dog poop in the backyard. She is now concerned that her puppy has worms. How do you respond to her concerns?

A. No need to worry, aged poop is not a threat for worms
B. Immediately treat the puppy, clean the old poop and everything
should be fine
C. Treat the puppy, clean the yard and pick up all fresh poop promptly

C. Treat the puppy, clean the yard and pick up all poop promptly

28

Why is pasture rotation important in parasite management?

A. It removes the animals from areas where high numbers of parasites
may be infecting them
B. It is a means of maintaining good bud condition score so that the
animals are less susceptible to parasites
C. Treating livestock for parasites can be effective and renders pasture
rotation unimportant to parasite control

A. It removes the animals from areas where high numbers of parasites
may be infecting them

29

FAMACHA is an example of a tactical treatment method

A. True
B. False

B. False

It is selective treatment