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RUSVM Parasitology > Final Exam > Flashcards

Final Exam Flashcards

1
Q

Horses get this dz from possum poop

A

Sarcocystis neurona

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2
Q

You want to control the population of this animal in horse barns and make sure they are not gettin in horse food because horses can get what dz from them

A

Sarcocystis neurona

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3
Q

Common name of the parasite in this picture

A

Equine protozoal myeloencephalitis (EPM)

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4
Q

Section of nervous tissue from a horse showing the characteristic rosette of organisms associated with ____

A

S. neurona

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5
Q

Gelding with ataxia, atrophy of hind quarter muscles. His owner feeds him outside every morning and night.

A

Equine protozoal myeloencephalitis (EPM)

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6
Q

Focal muscle atrophy is characteristic of what dz in horses? it is The most commonly diagnosed infectious equine neurologic disease in America

A

EPM

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7
Q

This CNS damage occurs in what species that is exposed to contaminated possums

A

Horses

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8
Q

The arrows are pointing to ___- found in EPM

A

Multifocal areas of perivascular cuffs

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9
Q

Focal vasculitis (Large arrow) Hemorrhages (Small arrow) are seen in what parasite?

A

Sarcocystis neurona

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10
Q

These are various samples taken from what type of host for Sarcocystis neurona?

A

Aberrant host horse

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11
Q

The arrows are pointing to what parts of Neospora spp.

A

Sporocysts (2 arrows) oocyst (1 arrow)

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12
Q

Aborted fetus caused by ___

A

Neospora spp.

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13
Q

This is a cyst from fetus brain most consistently affected and encephalitis most common lesion. Name the parasite

A

Neospora spp.

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14
Q

Identify the 2 cysts

A

Toxoplasma (left) Neospora spp. (right)

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15
Q

Name the parasite and how you would diagnose this

A

Cryptosporidium spp direct smear or concentrates sugar soln fecal float

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16
Q

Cryptosporidium oocysts in bovine fecal smear. Name the site of infection

A

epithelial cells of the digestive tract • the respiratory tract

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17
Q

Name the parasite

A

Cryptosporidium spp.

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18
Q

Sample taken from a dog. Name the protozoa?

A

Hepatozoon spp.

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19
Q

Amblyomma tick pictured is responsible for passing ____ to the host

A

Hepatozoon spp.

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20
Q

Name tthe protozoa

A

Babesia canis

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21
Q

Trophozoites or merozoites in red blood cells of what host are shown here

A

Dog

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22
Q

Rhipicephalus sanguineus pass what protozoa to dogs

A

Babesia canis

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23
Q

You pull these ticks off a dog with Depression, anorexia, anemia, splenomegaly. What is your dx?

A

Babesia canis

24
Q

A dog suffering from babesiosis got it from ____

A

Rhipicephalus sanguineus

25
Q

Babesia is dx by ?

A

Trophozoites or merozoites in peripheral blood smear (Giemsa)

26
Q

Name the protozoa

A

Babesia canis

27
Q

This is smaller than Babesia canis. Name the protozoa

A

Babesia gibsoni

28
Q

Name the parasite

A

Cytauxzoon felis

29
Q

The host of Cytauxzoon felis

A

cats

30
Q

Fever, anemia, icterus. Developing schizonts cause enlargement of infected cells. Occlusion of blood vessels – heart, liver, lungs. Rapid and fatal disease, south central USA

A

Cytauxzoon felis

31
Q

Necropsy shows damage from which protozoa

A

Cytauxzoon felis

32
Q

This black fly (buffalo nat) spread what protozoa

A

Leucocytozoon spp.

33
Q

This is the life cycle for ___

A

Leucocytozoon spp.

34
Q

• Organisms in blood or tissues is the dx for ?

A

Leucocytozoon spp.

35
Q

Domestic and wild fowl Vectors: blackflies & biting midges

A

Leucocytozoon spp.

36
Q

Adult sheep: Cool wet autumn, treated for adult nematodes, now it is late winter, diarrhea What parasite do u suspect?

A

Nematodirus

37
Q

Taenia and Echinococcus treat dogs and cats with?

A

praziquantel

38
Q

Damalinia ovis = most pathogenic

A

lice

39
Q

What do all of these have in common?

Psoroptes – sheep scabies •

Sarcoptes on cattle •

Rhipicephalus (Boophilus) •

Cochliomyia hominivorax

A

reportable

40
Q

purpose of parasite management

A

Maintain the parasites below the economic threshold • Slow down the development of parasite resistance to anthelmintics (anthelmintic resistance)

41
Q

Treat based on ease of management • Leads toward resistance

A

strategic treatment

42
Q

Unavoidable sometimes • Leads toward resistance

A

tactical treatment

43
Q

Selective treatment for which parasite that causes anemia in sheep. Is this available in cows?

A

hamonchus

no

44
Q

20-30% of animals harbor most of the worms

True or false

A

true

45
Q

Treatment of a proportion of the flock or herd based on certain criteria, while leaving the rest of the animals untreated • Criteria: FAMACHA©, FEC, etc

A

selective treatment

46
Q

< 1y of age: 3-4 fecals/y • > 1 y of age: 1-2 fecals/y • HW antigen and HW mff: 1-2x/y • Endemic regions annual testing for vector-transmitted pathogens • Consider local parasite prevalence and individual pet lifestyle factors • Adapt recommendations for emerging parasite threats

true or false

A

true

47
Q

Northern temperate climate • Larvae arrest during winter • Emerge, adults spring • Egg counts increase in spring • Southern temperate climates • Larvae encyst during summer • Transmission occurs during winter

this is the epidemiology for which equine parasite?

A

small strongyles

48
Q

2 Goals of tx and prevention in equines

A

Health and performance of equid - Preservation of anthelmintic efficacy

49
Q

Foal origin of cyathostomin infection

true or false

A

false

Mare origin of cyathostomin infection

50
Q

name seasonal parasites of horses

A

Flies Insects Ticks Lice* Mites*

*poor mngmnt/nourshisment

51
Q

Take away essential nutrients  Injury to vital organs  Decreased feed efficiency and lowered growth rates

All results of internal or external parasites in swine/avian?

A

internal

52
Q

treatments for avian helminths

A

Piperazine Fenbendazole, levamisole & ivermectin

53
Q

common st kitts parasites in cats

A

Trichuris spp. • Platynosomum sp. • Mammomonogamus sp. • Physaloptera sp. • Ancylostoma tubaeforme • Toxocara cati • Dipylidium and Taenia

54
Q

These are examples of ?

A

parasiticides

55
Q
A

RUSVM Parasitology (6 decks)

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