Lab 2-Eimeria

Question 1

Phylum of Eimeria

Answer 1

Plasmodium

Question 2

Kingdom of Eimeria

Answer 2

Animalia

Question 3

Commonly called?

Answer 3

Coccidia

Question 4

What do they commonly infect?

Answer 4

Epithelial cells of birds and mammals

Question 5

How do animals get the Eimeria oocysts?

Answer 5

Contaminated water or food source

Question 6

What disease do they cause?

Answer 6

Coccidiosis

Question 7

Where in the host do oocytes excyt?

Answer 7

Intestines

Question 8

What do oocysts release after excysition?

Answer 8

Sporozoites

Question 9

Where do sporozoites go after excysting?

Answer 9

Penetrate into intestinal epithelial cells

Question 10

What type of reproduction happens when sporozoites infect intestinal epithelial cells?

Answer 10

Schizogony/merogony

asexual reproduction

Question 11

How many rounds of merogony do Eimeria usu. do?

Answer 11

1-4 depending on species

Question 12

When does gametogony occur and where?

Answer 12

After ~3 rounds of merogony; intestinal epithelial cells

Question 13

Is Eimeria an intra or extracellular parasite?

Answer 13

Intracellular

Question 14

How do oocysts reach next host?

Answer 14

Pass through feces and deposited in water or food sources

Question 15

When do oocysts sporulate?

Answer 15

After a few days of being passed in the feces (outside of previous host’s body)

Question 16

Are infections self-limitig?

Answer 16

Yes

Question 17

How many hosts does it need?

Answer 17

1

Question 18

When is Eimeria infective?

Answer 18

After it has spent a few days outside previous host. It needs to sporulate first

Question 19

How many sporocysts does one oocyst produce?

Answer 19

4

Question 20

What are important features of Eimeria that define each species?

Answer 20

• Number of sporocysts in each oocyst

- Positions, and presence or absence, of refractile bodies and sporocyst or oocyst residual bodies

Question 21

How many sporozoites are in one sporocyst?

Answer 21

depends on the species

Question 22

How is Eimeria oocyst different from Plasmodium oocyst?

Answer 22

Eimeria oocyst produce resistant membrane and is passed through feces (outside host) while Plasmodium oocyst has no resistant membrane and releases sporozoites inside vector