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Parasitology > Protozoa - Coccidia of chicken and goose > Flashcards

Protozoa - Coccidia of chicken and goose Flashcards

1
Q

Where does the merozoite develop?

A: Inside schizont
B: In oocyst
C: In sporocyst
D: Duodenum

A

A: Inside Schizont

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2
Q

How many cells can be infected by a merozoite of Eimera?

A: 2
B: 4
C: 8
D: 1

A

D: 1

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3
Q

How many gamonts can develop from one schizont?

A: 2
B: Only one
C: Not any
D: Many

A

D: Many

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4
Q

How many epithelial cells can be infected by the content of one schizont of
Eimera?

A: No any
B: Few
C: Many
D: 1

A

C: Many

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5
Q

How can we recognize chicken coccidia by species in the simplest way?

A: Based on size of oocysts
B: Based on sporulation time
C: Based on necroscopy findings D: Based on morphology of oocysts

A

C: Based on necroscopy findings

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6
Q

In order to identify the species of a sporulated oocyte, what of the following is
needed?

A: Size of oocyte
B: Size of sporocytes
C: Shape of sporocytes
D: Shape of oocyte

A

A: Size of oocyte

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7
Q

What does the unsporulated oocyst contain?

A: Sporocyst
B: Zygote
C: Embryo
D: Sporont

A

B: zygote

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8
Q

What does the sporulated oocysts contain?

A: Macrogamont
B: Zygote
C: Embryo
D: Sporocysts

A

D: sporocyst

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9
Q

Where does the sporozoite develop?

A: In the schizont
B: In the oocyst
C: In the merozoite
D: In the intestine

A

B: In the oocyst

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10
Q

Where does the sporogony of Eimera maxima take place?

A: In outer environment
B: In the lumen of intestine
C: In the epithel of jejunum
D: In the schizonts

A

A: In outer environment

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11
Q

Which animal species can be infected by Eimera acervulina?

A: Chickens
B: Chickens and pheasants
C: Gallinaceous birds D: Domestic birds

A

A: chickens

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12
Q

Where does the sporogony of Eimera acervulina take place?

A: In outer environment
B: In the lumen of intestine
C: In the epithel of duodenum
D: In the schizonts

A

A: In outer environment

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13
Q

Where do the Eimera acervulina gamonts develop?

A: Duodenum and jejunum
B: Colon
C: Caecum
D: Ileum

A

A: Duodenum and jejunum

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14
Q

What can we observe on the surface of mucosa in case of E. necatrix infection?

A: Unclotted blood
B: Necrosis
C: Pink Exudate
D: White foci

A

A: Unclotted blood

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15
Q

Where does the sporogony of Eimera brunetti takes place?

A: In outer environment
B: In the lumen of intestine
C: In epithel of duodenum
D: In the propria of duodenum

A

A: In outer environment

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16
Q

Where do the Eimera brunetti schizonts develop?

A: Jejunum
B: Lower part of intestine
C: Gizzard
D: Duodenum

A

B: Lower part of intestine

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17
Q

Where do the Eimera tenalla schizonts develop?

A: Jejunum
B: Ileium
C: Caecum
D: Duodenum

A

C: Caecum

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18
Q

Which symptom does not appear in case of renal coccidiosis?

A: Bloody faeces
B: Weakness
C: Torticolilis
D: Paralysis

A

A: Bloody faeces

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19
Q

Where is the E. truncata primarily located?

A: Renal tubules
B: Jejunum
C: Proventriculus
D: Renal glomerulus

A

A: Renal tubules

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20
Q

Eimeria labbeanna occurs in?

A: Goose small intestine
B: Goose large intestine
C: Pigeon small intestine
D: Pigeon large intestine

A

C: Pigeon small intestine

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21
Q

What does the sporulated oocyst of coccidiosis contain?

A

4 sporocysts and 2 sporozoites

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22
Q

How many epithelial cells can become infected by 1 Eimeria oocyst at the
beginning of infection?

A

8 cells (4 sporocysts with 2 sporozoites in each)

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23
Q

How many cells can be infected by the content of one Eimera oocyst?

A

8

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24
Q

How many epithelial cells can be infected by the content of one Eimera
sporocyst?

A

2

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25
Q

How many macrogametes can develop from one macrogamont?

A

1

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26
Q

The correct order in the life cycle of Eimera?

A

Sporongy (in environment), schizogeny (in intestinal cells), gametogony (in intestinal cells),
sporogony (of new oocysts in the enviroment)

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27
Q

Which species of Eimera are haemorrhagic?

A

E. tenella, E. necatrix and E. brunetti

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28
Q

Which species of Eimera are not haemorrhagic?

A

E. maxima, E. acervulina, E. mitis and E. praecox

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29
Q

Which 3 species are not characterized by blood in the intestines?

A

E. acervulina, E. mitis and E. praecox

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30
Q

Which method do you not use to identify the species in the chicken coccidosis?

A

McMaster method

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31
Q

Time lapse from infection of host to apperence of parasite sexual product in
faeces is called?

A

Praepatent period

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32
Q

During gametogony when the merozoites develop into the female gametocytes
they are called?

A

Macrogametocytes

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33
Q

Which animal species can be infected by Eimera maxima?

A

Chicken

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34
Q

What do you find on mucosa during an infection with E. maxima?

A

Petechiae (also on serosa)

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35
Q

Which statement is true:

A

E. maxima has a 30x20 μm oocyst that is characteristic

36
Q

Size of oocyte can be used as identification for which of these species?

A

E. maxima or ”other” (oocysts of other species are not characteristic to identify species)

37
Q

Which has slightly orange/salmon pink exudate in lumen?

38
Q

Where does the schizogony of Eimera acervulina take place?

A

In epithel of duodenum and jejunum

39
Q

Which one has discrete white foci or transverse bands which are ladder-like?

A

E. acervulina

40
Q

Where do schizonts of Eimera necatrix develop?

A

In jejunum and ileum

41
Q

Animals infected by E. brunetti?

42
Q

What is not true.

A

E. brunetti is found in the duodenum

43
Q

Which animal species can be infected by Eimera tenella?

44
Q

Where do schizonts of E. mitis develop?

A

In the jejunum

45
Q

In the goose what species of Eimeria affects the kidneys?

A

E. truncate

46
Q

Which of the following is a symptom of E. truncata?

A

Torticollis

47
Q

Which statement is not true for the development of Eimeria species?

a) Schizogony occurs in gametogony. (It occurs in Schizogony)
b) Schizogony is initiated epithelially or sub-epithelially.
c) Sporulated oocysts are more resistant than unsporulated ones.
d) Occurrence of meronts with few merozoites is not characteristic.

A

a) Schizogony occurs in gametogony. (It occurs in Schizogony)

48
Q

Pre-disposing factors to Eimeria:

A

Young age, intensive (crowded, accelerated keeping), insufficient nutrition (lack of vitamins, protein in the feed), litter (deep), neglected hygienic measures, inter-current infections

49
Q

Which Eimeria species occurs extra-intestinally?

A

E. ninakohyakimovae in Goats’ lymph nodes and gall bladder

E. danoilovi in Ducks. Lesions in cerebellum.

50
Q

Difference between Isospora and Eimeria spp.?

A

Only Eimeria has cap, micropyle, and residual bodies.

51
Q

How many Eimeria spp. cause haemorrhagic lesions in small intestine of chicken?

A

Three (E. necratrix, E. maxima, E. brunetti)

52
Q

How many Eimeria spp. cause haemorrhagic or fibrinous lesions in the caeca?

A

Two (E. tenella, E. brunetti)

53
Q

Which Eimeria in the small intestine does not cause haemorrhages?

A

Not E. acervulina nor E. mitis

54
Q

What Eimeria causes haemorrhagic or fibrinous lesions in the caeca?

A

E. Brunetti

55
Q

Which Eimeria spp. in chicken is highly pathogenic

A

E. tenella, E. necratrix

56
Q

Which Eimeria spp. in chicken is moderately pathogenic

57
Q

Which Eimeria spp. in chicken is less pathogenic

A

E. acervulina, E.mitis

58
Q

Which Eimeria causes ladder-like white bands?

A

E. acervulina

59
Q

Eimeria acervulina location:

A

Duodenum (heavier infection extending to the jejunum)

60
Q

Which Eimeria spp. is complimentary to E. acervulina? (?)

A

E. mitis maybe, since both cause sub-clinical signs in chicken (less pathogenic)

61
Q

Location of Eimeria tenella: MCQ

A

Caecum

Epithelial cells – Lymphocytes – Macrophages – Crypt epithelium

62
Q

Which is the most pathogenic? E. tenella or E. acervulina?

A

E. tenella

63
Q

Which is/are the most pathogenic stage(s) of E. tenella?

A

2nd schizont

64
Q

Location of Eimeria maxima: MCQ

A

Jejunum

Occasionally in the duodenum, ileum

65
Q

Which Eimeria sp./spp. cause(s) typically coagulation necrosis?

A

E.brunetti

66
Q

Which Eimeria sp./spp. have 6-7 day pre-patent period?

A

E. tenella
E. necatrix
(5 days pre-patent period in E. brunetti, E. maxima)

67
Q

Which is most probably not found in chicken?

A

E. duodenalis, E. flavescens

68
Q

No neurological symptoms?

A

Eimeria of turkey

Chicken, Turkey, Pigeon, Duck. Duck → Causes cerebellar lesions.

69
Q

Which Eimeria species does not occur behind the small intestine

A

E. meleagridis

70
Q

Which turkey coccidium is at most forward?

A

E. meleagrimitis (jejunum, duodenum, ileum)

71
Q

The most pathogenic turkey coccidium?

A

E. adenoiedes
E. gallopavonis
E. meleagrimitis
(Not pathogenic – E. meleagridis)

72
Q

Which one is not found in turkey?

A

E. duodenalis (found in Pheasant)

73
Q

What is the characteristic colour of necrotic debris during E. adenoeides coccidiosis? (?)

74
Q

Which one causes catarrhal haemorrhagic inflammation in Pheasant?

A

E. colchici

75
Q

Coccidiosis of Pigeon

A

E. labbeana

E. columbarum

76
Q

Coccidiosis of pheasant is caused by

A

E. Colchici
E. Phasiani
E. Duodenalis

77
Q

Where does Eimeria labbeana and E. columbarum develop?

A

Pigeon, middle of small intestine

78
Q

Eimeria labbeana. In which spp. and organ?

A

Pigeon – Small intestine

79
Q

Coccidiosis of goose - intestinal is caused by

A

E. anseris
E. Nocens
E. Kotlani

80
Q

Coccidiosis of goose - renal is caused by

A

E. truncata

81
Q

Goose kidney coccidium?

A

E.truncata

82
Q

Eimeria kotlani is in which species?

A

Goose - Intestinal coccidiosis (also E. nocens, E. anseris)

83
Q

Coccidiosis of duck species

A

Tyzzeria perniciosa
E. danailovi
E. antis (apathogenic)
Wenyonella philiplevinei

84
Q

Which coccidia has 4 sporocysts with 4 sporozoites in each?

A

Wenyonella philiplevinei (coccidiosis of duck)

85
Q

How many Eimeria spp. does not cause haemorrhages in the small intestine?

A

One – E. anatis no haemorrhages

Haemorrhages in Ducks (3) – Tyzzeria perniciosia, E. danailovi, Wenyonella philiplevinei

Parasitology (4 decks)

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