Protozoa summary

Question 1

Protozoa

Answer 1

Eukaryotes, unicellular
organelles of locomotion - cilia, flagella, pseudopodia
most free living
axsexual reproduktion - fission and budding
sexual reproduction - gamogong ( union of gametes), sporulation

Question 2

Apicomplexa

Answer 2

• sporozoa
• obligate intracellular parasites
• sexual and asexual phases
• gliding locomotion

Question 3

explain the general life cycle of apicomplexa

Answer 3

Question 4

List the three group of apicomplexa

Answer 4

Coccidian enteric
Tissue coccida
Class Haematozoea

Question 5

Coccidian enteric

Answer 5

Highly host specific
most develop in digestive tract, some in kidney, liver or gall bladder
Disease of intensive husbandry –> watery to bloody diarrhoea w/ high morbidity
self limiting

Question 6

explain tissue coccidia

Answer 6

indirect lifecycle (mm 2 hosts)
Gamogony occurs in definite host (carnivore)
merogony and cyst - formation occurs in intermediate host

Question 7

Class Haematozoea

Answer 7

• transmitted by blood sucking arthropods
• order piroplasmoridia –> tick fever
• small pear shaped
• do not have spores, flagella, cilia
• asecual reproduction by binary fission
• anaemia, fever, toxic shock-like syndrome
• loss of condition, respiratory distress, diarrhoea

Question 8

List the two genera of coccidian enteric

Answer 8

Order Eimeria (birds, ruminants and marsupials)
Order Isospora (carnivores, people, pigs)

Question 9

list examples of coccidian enteric

Answer 9

Cryptospordium spp (c. parfum)

Question 10

list examples of tissue coccidia

Answer 10

toxoplasma gondii (cats)
Neospora apps (canids)
sarcocystis spp (dog, humans)

Question 11

List examples of class haematozoea

Answer 11

Babesia spp

Theileia spp

Question 12

Cryptosporidium spp

Answer 12

C. parvum
Coccidian enteric
mucous epithelium in ileum, stomach and respiratory tracts
small ocysts; parasite develops quickly and flood w/oocysts
transient disease, especially w/ stress and crowding
generally self limiting
zoonotic

Question 13

explain toxoplasma gondii

Answer 13

cats
Tissue coccidia
- begin infections except in immune suppression and pregnancy
- brain, cardiac m, skeletal m, tissue cysts
- Transmission by ingestion of sporulated oocysts or tissue cysts, transplacentaly

Question 14

Neospora spp

Answer 14

neospora canids
tissue coccidia
- gamogony
- hindlimb paralysis in pups
- intermediate host = cattle an horse = major abortion issue

Question 15

Explain sarcocystis spp

Answer 15

• muscle cysts in wide range of mammals
• dogs and humans
• muscle cysts in wide range of mammals

Question 16

Babesia spp

Answer 16

babesia bovis + bigemina, B. canis + gibsoni
of class haematozoea
- asexual development within RBC, divide by binary schizogony to produce 2 parasites
- Cycles of sexual and asexual repro within tick

Question 17

Theileria spp

Answer 17

- T, pava, T, buffle (cattle)
Class Haematozoea
- asexual development in lymphocytes and then RBC
- small rod like
- haemophyslis longicorns is vector

Question 18

babesia life cycle

Answer 18