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Parasitology > Lab 5 - Cryptosporidiosis, toxoplasmosis, besnoitiosis of cattle, sarcocystiosis (T) > Flashcards

Lab 5 - Cryptosporidiosis, toxoplasmosis, besnoitiosis of cattle, sarcocystiosis (T) Flashcards

1
Q

What is the size of a Cryptosporidium oocyst?

A

5-8 microns

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2
Q

Which genus has sporulated oocysts with 4 free sporozoites?

A

Cryptosporidium

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3
Q

What can we usually detect in the faeces during Sarcocystiosis in definite host/final host?

A

Sporocysts

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4
Q

What is the most frequent clinical form of Sarcocystiosis of the dog?

A

Subclinical

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5
Q

What does the human need to ingest to get infected with Sarcocystiosis?

A

Cystozoites

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6
Q

What does the human need to ingest to get infected with Sarcocystiosis?

A

Cystozoites

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7
Q

Muscle sarcosporidiosis can be found in?

A

Sheep, cattle, sheep, swine, horse and rabbit

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8
Q

Wheat-pea sized and greyish-yellow sarcocysts of … are found in the wall of esophagus?

A

S. gigantea (in sheep)

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9
Q

Intestinal Sarcosporidiosis can occur in?

A

Dog, cat, wild carnivores and man

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10
Q

What can be found in sections of vascular endothelium of heart, kidney etc. in Sarcosporidiosis?

A

Groups of merozoites or small schizonts

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11
Q

What is the Sacrocystiosis species of sheep among these following ones?

A

S. gigantea

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12
Q

What is the Sarcocystiosis species of cattle among these following ones?

A

S. hirsuta

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13
Q

What type of Sarcocystis oocyst can be found in fresh faeces?

A

Sporulated

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14
Q

What type of host of Sarcocystiosis can give the intestinal form of infection?

A

Final hosts – dog, cat, wild carnivores and man

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15
Q

Which statement is not true for Besnoitia besnoiti?

A

It ́s most important intermediate host is the cat. It can be transmitted by vectors, the cyst is visible
to the naked eye, develops in the endothel

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16
Q

Besnoitia besnoiti species are?

A

Obligatory heteroxenous

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17
Q

What animals are susceptible for Besnoitia besnoiti?

A

More ssp. of ruminants

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18
Q

What is the sign that does not appear in the chronic form of Besnoitiosis?

A

Itching

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19
Q

What method is not used to detect Toxoplasma tachyzoites during infection?

A

Sabin-Feldman dye test

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20
Q

Which genus has sporulated oocysts without sporocysts?

A

Cryptosporidium

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21
Q

What are the characteristics of Cryptosporidium meleagridis oocysts?

A

5 μm, spherical

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22
Q

Which clinical sign can be seen in dogs infected by Toxoplasma?

A

CNS symptoms (along with anorexia, pneumonia and diarrhea)

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23
Q

In which species does T. gondii cause necrotic foci and granuloma in liver, spleen, lungs and brain?

A

Rabbit

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24
Q

What is the size of Toxoplasma gondii cyst?

A

20-100 micrometers

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25
Q

What is the size of Toxoplasma cyst that contains tachyzoites?

A

20-100 μm

26
Q

Oocyst of Toxoplasma gondii is indistinguishable from that of?

A

Hammondia hammondi

27
Q

What is the patency period for Toxoplasmosis?

A

20 days

28
Q

What can be found in sporulated oocysts of Toxoplasmosis?

A

2 sporocysts each containing 4 sporozoites

29
Q

Which animals shed oocysts in Toxoplasmosis?

A

All species of cats as the definitive/final host

30
Q

For how long does a cat pass Toxoplasma oocysts in the faeces?

A

1-2 weeks

31
Q

What kind of host is the cat in Toxoplasma gondii?

A

Final Host/Definitive host

32
Q

In which animal can we find Toxoplasma oocysts in the faeces?

A

Cats (maximum 20 days/only for 1-2 weeks)

33
Q

How can we characterize the life cycle of Toxoplasma gondii?

A

Facultative heteroxenous

34
Q

What can we find on the surface of the placenta, as a consequence of Toxoplasma infection in sheep and goat?

A

Yellowish/white necrotic spots

35
Q

Which species does not abort when infected with Toxoplasmosis?

A

Cat

36
Q

Which form is not characteristic of avian?

A 
Cryptosporidiosis?
Hepatic form (cryptosporidiosis has intestinal, respiratory and renal form)
37
Q

Which symptom does not occur during Toxoplasmosis infection in cats?

A

Abortion

38
Q

Which is not true?

A

Toxoplasma oocysts are 5-8 μm (they are 10x12 μm, cryptosporidium oocysts are 5-8μm)

39
Q

Host range of Toxoplasmosis?

A

Cats, dogs, birds and humans and other mammals

40
Q

How many sporocysts do the Toxoplasma oocysts have?

A

Two

41
Q

Which animal species can be infected by Toxoplasma gondii?

A

Many mammals and birds

42
Q

In which location will Cryptosporidium baileyi not establish?

A

Stomach

43
Q

Which form of Cryptosporidiosis has the most severe outcome in broilers?

A

Respiratory

44
Q

Which one of the following methods is perfect to stain Cryptosporidium oocysts?

A

Kinyoun-staining

45
Q

How do we detect usually the oocysts of Cryptosporidia in faeces?

A

With flotation

46
Q

What form of Cryptosporidium can be found in fresh faeces?

A

Oocysts containing 4 sporozoites

47
Q

What are the characteristics of Cryptosporidium baileyi oocysts?

A

6-7 μm, oval

48
Q

What are the clinical signs for C. baileyi?

A

Dyspnea and diarrhoea (also: coughing, sneezing, nasal discharges and conjunctivitis)

49
Q

Which parasite are homoxenous but not host specific?

A

Cryptosporidium parvum

50
Q

What is the causative agent of Cryptosporidiosis in mammals?

A

C. muris (and C. parvum, C. andersoni and C. bovis, C. felis, C. canis and C. hominis)

51
Q

Which bird species are susceptible for C. bailyei infection?

A

Many species (especially young chickens)

52
Q

Where is Cryptosporidium mainly found?

A

Small intestine (Ileum) or abomasum in case of C. muris and C. andersoni

53
Q

Which species of Cryptosporidium occurs in birds?

A

C. baileyi (or C. galli or C. meleagridis)

54
Q

What organ is not involved during a C. baileyi infection of poultry?

A

Brain (organs affected: respiratory system, small and large intestine, cloaca and bursa Fabricius
and rarely in kidneys)

55
Q

What do the oocysts of Cryptosporidia contain?

A

4 sporozoites (no sporocysts)

56
Q

Which is the method used to detect Cryptosporidium?

A

Kinyoun staining (also Ziehl-Neelsen, Safranin-methylene blue staining and Giemsa)

57
Q

Life Cycle of Cryptosporidia parvum?

A

Homoxenous (via air/water/dust)

58
Q

Host range of Cryptosporidium baileyi?

A

Anseriform

59
Q

How can we characterize the host specificity of Cryptosporidia baileyi?

A

Euryxenous

60
Q

Host range of Cryptosporidiosis?

A

Euryxenous (mammals and birds)

Parasitology (16 decks)

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