Internal Parasites: Rickettsia and Protozoa

Question 1

Definition of Internal Parasite?

Answer 1

Live within an animal, derives from nutrition and protection at the expense of the host animal

Question 2

What type of parasite is a Rickettsiae?

Answer 2

intracellular (blood cells)

Question 3

What type parasite transmits by blood sucking vectors?

Answer 3

Rickettsia

Question 4

What are these examples of?

1. Anaplasma marginale
2. Ehrlichia canis

Answer 4

Rickettsia

Question 5

What type of parasite is a one-celled organism?

Answer 5

Protozoa

Question 6

What is it called when a protozoa is found in blood?

Answer 6

hemoprotozoa

Question 7

What is it called when protozoa are found in the feces?

Answer 7

intestinal protozoa or protozoa

Question 8

What type of Protozoa has 2 stages?

1. trophozoite
2. cyst

Answer 8

Giardia canis

Question 9

What stage of Giardia is this?

1. Capable of feeding and movement
2. Form that lives within host

Answer 9

Trophozoite

Question 10

What stage of Giardia is this?

1. Incapable of movement
2. Usually passed through feces
3. This stage is acquired by another host

Answer 10

Cyst

Question 11

What protozoa is found in contaminated water?

Answer 11

Giardia

Question 12

What protozoa is..

1. hard to find on a fecal float
2. direct smear with iodine or some other stain
3. Centrifugation

Answer 12

giardia

Question 13

What protozoa infection is treated with Metronidazole (Flagyl)?

Answer 13

Giardia

Question 14

What protozoa’s form is an Oocyst?

rigid walled cyst stage

Answer 14

coccidia

Question 15

What are these examples of?

1. Eimeria spp.
2. Isospora spp.

Answer 15

coccidia

Question 16

Where are coccidia infectious most commonly seen? (3)

Answer 16

1. pet stores
2. puppy mills
3. shelters

Question 17

What type of protozoa is this?

1. Hemoprotozoa
2. Seen on CBC differential smears

Answer 17

Babesia spp.