Lab 3 - Investigation of coccidia, coccidiosis of chicken, goose

Question 1

Where does the merozoite develop?

Answer 1

Inside schizont

Question 2

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

Answer 2

1

Question 3

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

Answer 3

Size of oocyte

Question 4

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

Answer 4

Based on necroscopy findings

Question 5

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

Answer 5

2

Question 6

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

Answer 6

Many

Question 7

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

Answer 7

8

Question 8

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

Answer 8

8 cells (4 sporocysts with 2 sporozoites in each)

Question 9

How many gamonts can develop from one schizont?

Answer 9

Many

Question 10

What does the sporulated oocyst of coccidiosis contain?

Answer 10

4 sporocysts and 2 sporozoites

Question 11

What does the unsporulated oocyst contain?

Answer 11

Zygote

Question 12

How many macrogametes can develop from one macrogamont?

Answer 12

1

Question 13

Where does the sporozoite develop?

Answer 13

In the oocyst

Question 14

What does the sporulated oocysts contain?

Answer 14

Sporocysts

Question 15

Which method of staining can be applied to detect Histomonas in tissues?

Answer 15

PAS

Question 16

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

Answer 16

Praepatent period

Question 17

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

Answer 17

McMaster method (it counts the number of oocysts but does not tell you which species it is)

Question 18

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

Answer 18

E. acervulina, E. mitis and E. praecox

Question 19

Which species of Eimera are not haemorrhagic?

Answer 19

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

Question 20

Which species of Eimera are haemorrhagic?

Answer 20

E. tenella, E. necatrix and E. brunetti

Question 21

The correct order in the life cycle of Eimera?

Answer 21

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

Question 22

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

Answer 22

Macrogametocytes

Question 23

Which animal species can be infected by Eimera maxima?

Answer 23

Chicken

Question 24

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

Answer 24

Petechiae (also on serosa)

Question 25

Where does the schizogony of Eimera acervulina take place?

Answer 25

In epithel of Duodenum and Jejunum

Question 26

Where does the sporogony of Eimera acervulina takes place?

Answer 26

In outer environment

Question 27

Which animal species can be infected by Eimera acervulina?

Answer 27

Chickens

Question 28

Where does the sporogony of Eimera maxima takes place?

Answer 28

In outer environment

Question 29

Which has slightly orange/salmon pink exudate in lumen?

Answer 29

E. maxima

Question 30

Which statement is true?

Answer 30

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

Question 31

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

Answer 31

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

Question 32

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

Answer 32

E. acervulina

Question 33

Where does the gametogony of E. acervulina take place?

Answer 33

Duodenum and Jejunum

Question 34

Where do the Eimera tenalla schizonts develop?

Answer 34

Caecum

Question 35

Which animal species can be infected by Eimera tenella?

Answer 35

Chicken

Question 36

Where do the Eimera brunetti schizonts develop?

Answer 36

Lower part of intestine

Question 37

What is not true?

Answer 37

E. brunetti is found in the duodenum

Question 38

Where does the sporogony of Eimera brunetti takes place?

Answer 38

In outer environment

Question 39

Animals infected by E. brunetti?

Answer 39

Chickens

Question 40

In coccidiosis caused by E. necatrix, what can be found on the intestines (lumen)?

Answer 40

Unclotted blood

Question 41

Where do schizonts of E. mitis develop?

Answer 41

In the Jejunum

Question 42

Which symptom does not appear in case of renal coccidiosis?

Answer 42

Bloody faeces

Question 43

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

Answer 43

Torticollis

Question 44

Where is the E. truncata primarily located?

Answer 44

Renal tubules

Question 45

In the goose what species of Eimeria affects the kidneys?

Answer 45

E. truncata

Question 46

Where do schizonts of Eimera necatrix develop?

Answer 46

In Jejunum and Ileum

Question 47

Where do the Eimera acervulina gamonts develop?

Answer 47

Duodenum and Jejunum