Deck 6

Question 1

What is the location of Histomonas meleagridis?

A. Stomach
B. Liver
C. Ceca

Answer 1

Ceca (primarily ceca but also liver)

Question 2

What is the species responsible for East Coast Fever?

A. Theileri hirci
B. T. parva
C. T. bovis
D. T. muris
E. T. ovis

Answer 2

T. parva

Question 3

What is the life cycle of plasmodium

Answer 3

o Human liver stage
Female mosquito inject parasite -> sporozoites into host after blood meal -> sporozoits reach the liver and invade hepatocytes, the mature to schizonts -> schizont rupture and release merozoites
o Human blood stage
-> erythrocytic Merozoites leave the liver and incade erythrocytes in which they reproduce and dvp into trophozoites (ring-stage) -> trophozoites mature into schizonts and rupture to release merozoites -> then some differentiate into gametocytes
o Mosquito stage
-> sporogonic cycle 48 Gametocytes enter in mosquitos during the blood meal and undergo sexual reproduction in the midgut froming the zygote -> ookinete is formed and dvp into sporozoites, which migrate to salivary gland -> mosquito injects sporozoites into another host during blood meal

Question 4

What genera is Encephalitozoon cuniculi?

A. Microsporida
B. Myxozoa
C. Ciliophora

Answer 4

Microsporida

Question 5

What are the differences between tachyzoites and bradyzoites of Toxoplasma gondii?

Answer 5

Motile coccidians.
- Tachyzoites divide fast, found in pseudocysts
- Bradyzoites divide slower because of Ab effect, found in tissue cyst

Question 6

Leucocytozoon simondi is a parasite of what kind of host?

Answer 6

birds

Question 7

Neosporium caninum- what are its lifecycle and pathogenesis?

Answer 7

IH ingest sporulated oocyst -> excyst , transform to tachyzoites -> undergo endoploygony intracellularly -> pseudocyst formation in various tissue cells -> rapture ->tachyzoites release and penetrate other cells -> become bradyzoites and undergo endodyogony -> tissue cyst -> FH ingest tissue cyst -> bradyzoites excyst in intestine -> differentiate into micro and macro gamonts -> zygote -> unsporulated oocyst shed in feces of FH
IH= eq, cow -> abortion
DH= dog
Transmission= horizontal and vertical

Question 8

What is the cause of neonatal diarrhea in piglets?

Answer 8

Isospora suis

Question 9

Phlebotomae and lutzomyia are vectors of:

Answer 9

Leishmania - sandfly

Question 10

What diptera are vectors of Trypanosoma equiperdum?

Answer 10

None. T.equiperdum is transmitted by coitus.

Question 11

Tritrichomans foetus- how many flagella?

Answer 11

3 anterior flagella and 1 posterior free flagella

Question 12

How/what is this -

Answer 12

Oocyst of cryptosporidium with 4 sporozoites

Question 13

How to diagnose giardosis?

Answer 13

Aspiration from duodenum and sample of faeces by flotation method according to Faust. Every 3 days

Question 14

What causes cutaneus leishmaniosis?

Answer 14

L. tropica major and minor, L. aethiopica

Question 15

Where does the gamogony of Babesia occur?

Answer 15

Formation of gamonts – mammalian RBC.
Gametogony – intestinal cell of tick.

Question 16

What causes blackhead disease?

Answer 16

Histomonas meleagridis.

Question 17

In which form is Babesia found in vertebrate?

Answer 17

Merozite & gamont.

(Sporozoites are found in the tick and are the infective form for the vertebrate host, but they are not present in the vertebrate itself, except during the initial infection when they are injected into the host by the tick.)

Question 18

Where dose sporogony occur in Eimaria?

Answer 18

External environment

Question 19

How to diagnose trichomonas?

Answer 19

By clinical signs, agent identification, serological test.
- T gallinae - swap of esophagus of pigeons
- T.foetus - swabbing from vagina in first few days after infection Bull = examination of sperm- swabbing of preputial sac. Abortion - examination of amniotic fluids.

Question 20

What is intravital diagnosis of sarcocycs?

Answer 20

Intermediate host - iv.
- serological test (IFAT, ELISA, IHAT)
- biopsy -> histology

Question 21

What is the vector of trypanosome?

Answer 21

Glossina spp. (tsetsefly)