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RUSVM Parasitology Lab Final & Final > Comprehensive Review > Flashcards

Comprehensive Review Flashcards

1
Q

Identify this parasite of swine

A

Haematopinus suis

The sucking louse of swine

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2
Q

Neurocysticercosis is associated with which parasite?

Which form is ingested by humans?

A

Taenia solium

Humans ingest the oncosphere

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3
Q

Which swine parasite causes “milk spots”?

A

Ascaris suum

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4
Q

What is the common name for Amblyomma americanum?

A

Lone Star Tick

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5
Q

Though Balantidium spp. is not considered a primary pathogen, what is the key clinical sign?

A

dysentery

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6
Q

What is the infective stage for Ascaridia spp?

A

Egg with L2

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7
Q

Which cestode is associated with the term “Nodular Tapeworm Disease”?

A

*Raillietina *spp.

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8
Q

Isospora suis is associated with which age group of pigs? What is the main clinical feature?

A

1-2 week old piglets, yellow diarrhea

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9
Q

Which species transmits Habronema spp. to horses?

A

Stomoxys calcitrans

(Stable fly)

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10
Q

Which ruminant parasite has developed resistance to all groups of anthelminthics?

A

Haemonchus contortus

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11
Q

What are the sites of infestation for the horn fly? What is the scientific name?

A

Haematobia irritans

Back, sides, and abdomen of cattle

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12
Q

What is the common name for Linognathus vituli?

A

Long-nosed cattle louse

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13
Q

This protozoan is a major cause of abortion in dairy cows all over the world:

A

*Neospora *spp.

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14
Q

What is the infective stage for Teladorsagia circumcinta?

A

L3

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15
Q

In which species is Gamma radiation used for control?

A

Screwworm

Cochliomyia hominovorax

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16
Q

What is the infective stage for Balantidium spp?

What is the most severe clinical sign?

A

Cyst.

Dysentery

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17
Q

What is the infective stage for Leucocytozoon spp?

A

Sporozoite

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18
Q

What is the infectivestage for *Sarcocystis neurona *in the final host?

A

Mature sarcocyst

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19
Q

What is the most common route of infection for Toxocara canis?

A

Transplacental/prenatal

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20
Q

Which parasite is responsible for causing the most severe cutaneous larval migrans in humans?

A

Ancylostoma braziliense

(hookworm)

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21
Q

What is the most common lungworm in cats?

A

Aelurostrongylus abstrusus

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22
Q

What is the most common tick on dogs in most of North America?

A

Dermacentor spp.

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23
Q

Which parasite is considered to be the most important parasite of cattle in the USA?

A

Ostertagia ostertagi

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24
Q

Together with Ostertagia, this parasite is the most common nematode of weanling age cattle in North America:

A

*Cooperia *spp.

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25
Q

Which parasite could potentially cause the most severe cattle mange?

A

Sarcoptes scabiei

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26
Q

Which parasite is considered the most pathogenic of lice infesting sheep?

A

Damalinia ovis

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27
Q

What is the most common poultry mite?

A

Ornithonyssus spp. (Fowl mite)

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28
Q

Which family of ticks do hard ticks belong to?

A

Ixodidae

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29
Q

What is the common name for Ambylomma maculatum?

A

Gulf coast tick

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30
Q

What is the common name for Cheyletiella yasguri?

A

“walking dandruff”

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31
Q

Which species of Heterakis spp. is pathogenic?

A

*Heterakis isolonche *

Infections with H. isolonche may produce diarrhea, emaciation and death.

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32
Q

What is the scientific name for the Red chicken mite?

A

Dermanyssus spp.

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33
Q

What is the #1 cause for abortion in dairy cows all over the world?

A

*Neospora *spp.

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34
Q

Which diagnostic method would you use to diagnose Sarcoptes scabiei in pigs?

A

Ear swab!

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35
Q

Identify this parasite in swine. What clinical signs are associated with this parasite in pigs? Where is the larval stage found? What is the diagnostic stage?

A

Trichinella spp.

No clinical signs in pigs. Larval stages are found in muscle.

Diagnostic stage: Coiled L1 in striated muscle.

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36
Q

What is the infective stage of Sarcocystis neurona for the final host?

A

Mature sarcocyst

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37
Q

Perianal irritation associated with Oxyuris equi leads to what clinical sign?

A

Pruritus (itching)

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38
Q

How long can Cyanthostomin larvae live in the intestinal wall?

A

Up to 2.5 years

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39
Q

Which parasite may lead to the classic “air hunger” position in an animal?

A

*Dictyocaulus viviparus *(Cattle lungworm)

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40
Q

Which parasite is known to transmit viruses of bluetongue and African horse sickness?

A

*Culicoides *spp.

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41
Q

What is the infective stage for Parascaris equorum?

A

L2 in egg

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42
Q

At what age are cattle most susceptible to Babesia bigemina?

A

Older animals are more susceptible, younger animals are more immune.

Inverse Age Susceptibility

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43
Q

From the 1st exam: The primary purpose of a veterinarian is…

A

to minimize impact on production.

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44
Q

What is the main mite of sheep?

A

Psoroptes ovis

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45
Q

If you hear “Poor Sow Syndrome,” which two parasites should immediately come to mind?

A

*Hyostrongylus *spp. and *Oesophagostomum *spp.

46
Q

When can you find Dermanyssus gallinae on the avian host?

A

night time

(“night mite”)

47
Q

What is the life cycle of lice?

A

Egg –> Nymph –> Adult

48
Q

What is the life cycle of fleas?

A

Egg –> Larvae –> Pupa –> Adult

49
Q

What is the life cycle of flies?

A

Egg –> Larvae –> Pupae –> Adult

50
Q

What is the life cycle of ticks?

A

Egg –> Larvae –> Nymph –> Adult

51
Q

What is the life cycle of mites?

A

Egg –> larvae –> nymph –> adult

52
Q

Small white worms measuring 1-1.5 cm were discovered in the cecum of a chicken during necropsy.

What is the parasite? What is the infective stage?

A

*Heterakis *spp.

L2 in egg is infective

53
Q

Which parasites that we’ve covered are reportable?

A
  • Psoroptes ovis
  • Sarcoptes scabiei in cattle
  • Cochliomyia hominovorax
  • Rhipicephalus (Boophilus) annulatus (cattle)
54
Q

Which parasites that we’ve covered cause bottle jaw?

A
  • Fasciola hepatica
  • Haemonchus contortus
  • Ostertagia ostertagi
  • Teladorsagia
55
Q

You see these eggs in the feces of a chicken with bloody diarrhea.

What is the parasite? What other signs might you see?

A

Eimeria spp.

Persistent cecal core of clotted blood

56
Q

Which of the following requires a human as one of its hosts?

  1. Taenia solium
  2. Taenia saginata
  3. Taenia hydatigena
  4. 1 and 2
  5. 2 and 3
A
  1. Taenia solium & Taenia saginata
57
Q

You remove this louse from a pig.

What could it be? Is it Ischnoceran or Anopluran?

A

Haematopinus suis

Anopluran

58
Q

Which of the following is TRUE about Trichomonas?

  1. Cysts are the infective stage in pigeons
  2. The best diagnostic method is a preputial wash in the bull
  3. It is found in the small intestine
  4. Birds can get it from a contaminated drinking source
A
  1. Birds can get it from a contaminated drinking source
59
Q

Which of the following is TRUE about Tritrichomonas?

  1. Cysts are the infective stage in pigeons
  2. The best diagnostic method is a preputial wash in the bull
  3. It is found in the small intestine
  4. Birds can get it from a contaminated drinking source
A
  1. The best diagnostic method is a preputial wash in the bull
60
Q

Farmer Jones has noticed that his chickens have been restless all the time. You look and find this parasite on the chickens.

What is your diagnosis? What is your recommendation for Farmer Jones?

A

Ornithyssus spp.

Remove the chickens, clean the coop, and leave it empty for 2-3 weeks

61
Q

What nematode is known for causing both urticaria and diarrhea?

A

Strongyloides westeri

62
Q

Which of the following does not allow for transplacental transmission?

  1. Strongyloides stercoralis
  2. Strongyloides westeri
  3. Strongyloides papillosus
  4. Strongyloides ransomi
A

Strongyloides westeri

63
Q

What is FAMACHA used for?

A

it is used to identify animals that need treatment and as a targeted selective treatment protocol

*remember: this is NOT used to diagnose anything!

64
Q

What is periparturient rise?

A

An increase in the number of parasite eggs in the feces prior to parturition.

65
Q

You use the McMaster method to look at the amount of eggs per gram as well as fecal culture in Farmer Smith’s 5 cows to determine whether they need to be dewormed at that time and what kind of dewormer they require.

This is an example of what kind of anthelmintic protocol?

A

Selective

66
Q

You remove this louse from a dog.

What could it be?

A

Linognathus setosus

67
Q

You remove this louse from a sheep.

What could it be?

A

Linognathus ovillus or Linognathus pedalis

68
Q

What is the common name associated with Syngamus trachea?

A

Gapeworm

69
Q

What is the common name associated with Sarcophagidae?

A

Flesh fly

70
Q

What is the common name associated with Calliphoridae?

A

Blowfly

71
Q

What is the diagnostic test associated with Tritrichomonas foetus

A

Bovine preputial wash <!--EndFragment-->

72
Q

You find this during necrospsy on the liver of a pig who had decreased weight gain and pneumonia. What is your diagnosis?

A

Ascaris suum

73
Q

You find this during necrospsy on the liver of a turkey who had enterohepatitis and cecal inflammation. What is your diagnosis?

A

Histomonas spp.

74
Q

You see these eggs in the feces of a chicken and on necropsy you see white worms in the small intestine.

What is your diagnosis?

A

Ascaridia spp.

75
Q

You see these eggs in the feces of a chicken and on necropsy you see white worms in the cecum.

What is your diagnosis?

A

Heterakis spp.

76
Q

You find this parasite near a new cow that you are examining for Dr. Jones. What is it?

A

Otobius spp.

77
Q

You find this parasite near a new cow that you are examining for Dr. Jones.

Where does the larvae live on the host?

A

Otobius spp.

Larvae in ears

78
Q

Which order of Cestoda requires 2 intermediate hosts?

A

Pseudophyllidea

79
Q

What is the prepatent period?

A

Time taken for development from infection until the mature adult parasites are producing eggs, larvae or other stages

80
Q

What is the common name for *Ancylostoma *spp?

A

Hookworm

81
Q

What is the infective stage for Trichuris spp?

A

L1

82
Q

What is the infective stage for Strongyloides westeri?

A

L3

83
Q

What is the infective stage for Echinococcus granulosus?

A

Hydatid cyst

84
Q

What is the infective stage for Taenia hydatigena?

A

Cysticercus

85
Q

What is the infective stage for Anoplocephala magna?

A

Cysticercoid

86
Q

Where do you find Hypoderma bovis in the overwintering stage?

A

In the epidural fat of the spinal cord

87
Q

Where do you find Hypoderma lineatum in the overwintering stage?

A

Esophagus

88
Q

What is the intermediate host for Mullerius spp in the sheep?

A

snail

89
Q

What is the intermediate host for Metastrongylus spp in the pig?

A

Earthworm

90
Q

What is the intermediate host for Moniezia?

A

Orbatid mite

91
Q

What pathogenicity do you associate with Taenia hydatigena in sheep?

A

Hepatitis cysticercosa

92
Q

In which trimester does Sarcocystis spp cause abortions?

A

3rd

93
Q

In which trimester does Neospora spp cause abortions?

A

2nd

94
Q

In which trimester does Tritrichomonas spp cause abortions?

A

1st

95
Q

What is unique about Cryptosporidium?

A

It can autoinfect

96
Q

What type of mouthparts does Stomoxys calcitrans have?

A

Piercing/ sucking

97
Q

What is the disease condition in humans for the Zipperworm?

A

Sparganosis

98
Q

What type of parasite has the following life cycle: Miracidia, Cercariae, Mesocercariae?

A

Fluke

99
Q

T/F: Trichodectes canis is an ischnocera louse

A

True

100
Q

What is coccidiasis (as opposed to coccidiosis)?

A

Coccidiasis: eggs are present in the feces, but the animal is not suffering from clinical signs

101
Q

What is the best treatment option for a pregnant cow with ticks?

A

Eprinomectin (MCLs)

102
Q

Which type of organisms are parasites of epithelial cells?

A

Coccidia protozoans

103
Q

What is/are the site(s) of infection for Damalinia bovis in cattle?

A

head, poll, neck, shoulders, back, tail switch

104
Q

What is the infective stage for *Dictyocaulus *spp?

A

L3

105
Q

What is the infective stage for Nematodirus spp?

A

L3

106
Q

What is the infective stage for *Oesophagostomum *spp?

A

L3

107
Q

What is the infective stage for *Hyostrongylus *spp?

A

L3

108
Q

What is the infective stage for Dipylidium caninum?

A

Cysticercoid

109
Q

Which suborder of lice is slow-moving and (in general) more pathogenic?

A

Anoplurans

110
Q

How many pairs of legs do adult arachnids have? What about arachnid larval stages?

A

4 pairs in adults

3 pairs in larval stage

RUSVM Parasitology Lab Final & Final (6 decks)

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