Protozoa 1

Question 1

Protozoa

Answer 1

• unicellular, eukaryotic organisms
• locomotion is accomplished by: pseudopodia, flagella, gliding movements-no locomotion organelle, cilia
• Classification based on mode of locomotion

Question 2

Zoite

Answer 2

functional unit of protozoan development

Question 3

Sporozoite

Answer 3

infective form found in a sporulated oocyst

Question 4

Trophozoites

Answer 4

form which feeds and grows

Question 5

Tachyzoites

Answer 5

form which divides rapidly

Question 6

Bradyzoites

Answer 6

form which divides slowly

Question 7

Asexual reproduction

Answer 7

• binary fission, budding, schizogony (merogony)
• protozoa that divide asexually have a short generation time
• Exponential increase in # of zoites
• destruction of host cells in proportion to the infection
• stops after a fixed number of repetitions

Question 8

Merozoite

Answer 8

becomes either a Macrogametocytes & then a macrogamete OR microgametocyte & then several microgametes

Question 9

When a microgamete fertilizes a macrogamete a ____ forms; then a wall forms around this and becomes an _____

Answer 9

zygote

oocyst

Question 10

Eucoccidiorda

Answer 10

• parasites of epithelial cells

- sexual and asexual reproduction occurs in epithelial cells

Question 11

Piroplasmorida

Answer 11

• parasites of blood cells
• ticks as vectors
• sexual reproduction takes place in ticks

Question 12

Haemosporida

Answer 12

• parasites of blood cells
• biting insects as vectors
• sexual reproduction takes place in insects

Question 13

Balantidium coli

• host
• ID

Answer 13

• pigs, rodents, primates, HUMANs

- Trophozoites and cysts

Question 14

Balantidium coli

• site of infection
• pathogenesis/lesions/CS

Answer 14

• Large intestine

- mild to severe enteritis & dysentery in pigs and humans. Ulceration in humans

Question 15

Balantidium coli

• Dx
• Tx/prevention

Answer 15

• usually cysts seen

- tetracyclines are effective