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Parasitology > Lab test 4 > Flashcards

Lab test 4 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

which genus has sporulated oocysts without sporocysts

A

cryptosporidium

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4
Q

what are the characteristcs of cryptosporidium megeagridis oocysts?

A

5 micrometer, spherical

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5
Q

which form is not characteristic of avian cryptosporidiosis?

A

hepatic form (crytosporidiosis has intestinal, respiratory and renal form)

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6
Q

host range of cryptospriodiosis?

A

euryxenous (mammals and birds)

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7
Q

how can we characterize the host specificity of cryptosporidia balley?

A

euryxenous

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8
Q

host range of cryptosporidium baileyi?

A

anseriform

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9
Q

life cycle of cryptosporidia parvum?

A

homoxenous (via air/water/dust)

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10
Q

which is the method used to detect cryptosporidium?

A

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

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11
Q

what do the oocyst of cryptosporidia contain?

A

4 sporozoites (no sporocysts)

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12
Q

what organ is not involved during a C. balleyi infection in poultry?

A

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

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13
Q

which species of cryptosporidium occurs in birds?

A

C. balleyi (or C. galli or C. meleagridis)

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14
Q

where is cryptosporidium mainly found?

A

small intestine (ileum) or abomasum in case of C. muris and C. andersoni

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15
Q

which bird species are suseptible for C. balleyi infection=

A

many species (especially young chickens)

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16
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)

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17
Q

which parasite are homoxenous but not host specific?

A

cryptosporidium parvum

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18
Q

what are the clinical signs for C. baileyi?

A

Dyspnea and diarrhoea (also coughing, sneezing, nasal discharge and conjunctivitis)

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19
Q

what are the characteristics of cryptosporidium baileyi oocysts?

A

6-7 micrometer, oval

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20
Q

what form of cryptosporidium can be found in fresh faeces?

A

oocysts containing 4 sporozoites

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21
Q

how do we detect usually the oocysts of cryptosporidia in faeces?

A

with flotation method

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22
Q

which one of the following methods is perfect to stain cryptosporidium oocysts?

A

kinyoun-staining

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23
Q

which form of cryptosporidiosis has the most severe outcome in broilers?

A

respiratory

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24
Q

in which location will cryptosporidium baileyi not establish

A

stomach

25
Q

which animal species can be infected by toxoplasma gondii?

A

many mammals and birds

26
Q

how many sporocysts do the toxoplasma oocysts have?

A

two

27
Q

which is not true?

A

toxoplasma oocysts are 5-8 micrometer (they are 10x12 micrometer, cryptosporidium oocysts are 5-8 micrometer)

28
Q

host range of toxoplasmosis?

A

Cats, dogs, birds and humans and other mammals

29
Q

which symptoms does not occur during toxoplasmosis infection in cats?

A

abortion

30
Q

which species does not abort when infected with toxoplasmosis

A

cat

31
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

32
Q

how can we characterize the life cycle of toxoplasma gondii?

A

facultative heteroxenous

33
Q

in which animal can we find toxoplasma oocysts in the faeces?

A

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

34
Q

what kind of host is the cat in toxoplasma gondii?

A

final host/definitive host

35
Q

for how long does a cat pass toxoplasma oocysts in the faeces?

A

1-2 weeks

36
Q

which animal shed oocysts in toxoplasmosis?

A

all species of cats as the definitive host

37
Q

what can be found in sporulated oocysts of toxoplasmosis?

A

2 sporocysts each containing 4 sporozoites

38
Q

what is the patency period for toxoplasmosis?

A

20 days

39
Q

oocyst of toxoplasma gondii is indistinguishable from that of?

A

Hammondia hammondi

40
Q

what is the size of toxoplasma cyst that contains tachyzoites?

A

20-100 micrometer

41
Q

what is the size of toxoplasma gondii cyst

A

20-100 micrometer

42
Q

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

A

Rabbit

43
Q

which clinical sign can be seen in dogs infected by toxoplasma?

A

CNS symptoms (along with anorexia, pneumonia and diarrhoea)

44
Q

what method is not used to detect toxoplasma tachyzoites during infection?

A

Sabin-feldman dye test

45
Q

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

A

itching

46
Q

what animals are susceptible for Besnoitia besnoiti?

A

more ssp. of ruminants

47
Q

besnoitia besnoiti species are?

A

obligatory heteroxenous

48
Q

which statement is not frue for besnoitia besnoiti?

A

it is 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.

49
Q

whay type of sarcocystis oocyst can be found in fresh faeces?

A

sporulated

50
Q

what type of host of sacrocystiosis can give the intestinal form of infection?

A

final hosts - dog, cat, wild carnivores and man

51
Q

what is the sarcocystiosis species of cattle among these following ones?

A

S. hirsuta

52
Q

what is the sacrocystiosis species of sheep among these following ones?

A

S. gigantea

53
Q

what can be found in sections of vascular endothelium of the heart, kidney etc. in sarcosporiodiosis?

A

Groups of merozoites or small schizonts

54
Q

intestinal sarcosporiodiosis can occur in?

A

dog, cat, wild carnivores and man

55
Q

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

A

S. gigantea (in sheep)

56
Q

muscle sarcosporidiosis can be found in?

A

sheep, cattle, swine, horse and rabbit

57
Q

wht does the human need to ingest to get infected with sarcocystiosis?

A

cystozoites

58
Q

what is the most frequent clinical form of sarcocystiosis of the dog?

A

subclinical

59
Q

what can we usually detect in the faeces during sarcocystiosis in definite host/final host?

A

sporocysts

Parasitology (9 decks)

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