COCCIDIAN

Question 1

Class of Coccidians

Answer 1

Class Sporozoea

Question 2

Coccidian parasites infect the __________ ________ of animal

Answer 2

intestinal tracts

Question 3

The largest group of apicomplexan protozoa

Answer 3

COCCIDIANS

Question 4

In ________, _____________ and __________________ only a single direct cycle of transmission occurs, both the asexual and sexual stages of multiplication occurs in a single host and that is to ______.

Answer 4

Isospora
Cyclospora
Cryptosporidium

man

Question 5

In ____________ and ___________, the sexual stages are usually in the intestinal mucosa of a _______________ host (the predator)

Answer 5

Sarcocystis
Toxoplasma
carnivorous

Question 6

-cosmopolitan distribution
-seropositive prevalence rates vary
-generally causes very benign disease in immunocompetent adults tissue cyst forming coccidia

Answer 6

Toxoplasma gondii

Question 7

what is the definitive host of toxoplasma gondii

Answer 7

felines

Question 8

infects wide range of _________ and ____________ (intermediate hosts)

Answer 8

birds and mammals

Question 9

has been coined for the first, actively multiplying merozoites that develop within the intermediate host, irrespective of whether infection is from oocysts or tissue cysts

Answer 9

Tachyzoites

Question 10

what is the non infectious and infectious merozoites that develop within tissue cysts.

Answer 10

Metrocytes (noninfectious)
Bradyzoites (infectious)

Question 11

-ingestion of oocysts
-sporozoites penetrate intestinal epithelium
-rapid intracellular replication (any cell)
-dissemination via macrophages

Answer 11

TACHYZOITE STAGE

Question 12

-dormant, slowly replicatng
due to host immune response
-chronic or latent infection
-tissue cysts primarily in brain and muscle

Answer 12

Bradyzoite stage

Question 13

The organisms can grown in any organs or tissues, developing in the _________, ___________ and __________________

Answer 13

brain, eyes, and skeletal muscle

Question 14

most of the cases are _____________

Answer 14

asymptomatic

Question 15

diagnosis: to detect antibodies

Answer 15

serological test

Question 16

diagnosis: very sensitive and specific but requires maintenance of live organism

Answer 16

sabin-feldman methylene blue dye test

Question 17

detection of the parasites DNA

Answer 17

polymerase chain reaction (PCR)

Question 18

controls toxoplasma but do not kill it

Answer 18

Pyrimethamine and Sulfadiazine

Question 19

pyrimethamine can cause lower blood counts

Answer 19

Leucovorin (folic acid)

Question 20

causes allergic reaction but can be substituted by clindamycin

Answer 20

Sulfadiazine

Question 21

prevent occurence of hypersensitivity

Answer 21

corticosteroids

Question 22

prophylaxis for immunocompromised

Answer 22

trimethroprim-sulfamethoxazole