Small Animal Parasites 2

Question 1

What are trematodes?

Answer 1

A class of parasitic flatworms also known as flukes.

Question 2

Which systems are affected by trematodes?

Answer 2

Gastrointestinal, respiratory, circulatory.

Question 3

What is the definitive host for Nanophyetus salmincola?

Answer 3

Canine and other carnivores.

Question 4

What is the intermediate host for Platynosomum fastosum?

Answer 4

Land snail, isopod, and lizard.

Question 5

What zoonotic potential is associated with schistosomes?

Answer 5

Swimmer’s itch and cercarial dermatitis.

Question 6

What is the primary definitive host for Giardia spp.?

Answer 6

Dogs, cats, and humans.

Question 7

What are the forms of Giardia duodenalis?

Answer 7

• Trophozoite (motile, flagella) * Cyst (resistant).

Question 8

What is the life cycle of Giardia duodenalis?

Answer 8

Direct life cycle with trophozoite in small intestine and cysts passed in feces.

Question 9

How is Giardia diagnosed?

Answer 9

• Fecal flotation * Direct saline smear * ELISA antigen.

Question 10

What are the forms of Cystoisospora spp.?

Answer 10

• Oocyst (immature, resistant) * Mature (contain sporozoites).

Question 11

What is the life cycle of schistosomes?

Answer 11

Adults in mesenteric veins, ova lodge in venules, hatch in water, penetrate snails.

Question 12

What type of hosts do schistosomes have?

Answer 12

Dioecious with separate male and female.

Question 13

What is the diagnostic method for Heterobilharzia americana?

Answer 13

• Fecal sedimentation * Fecal smear * ELISA / PCR.

Question 14

What is the indirect life cycle of Paragonimus kellicotti?

Answer 14

• Eggs coughed up, swallowed, passed in feces * Miracidium penetrates snail.

Question 15

What is the pathology associated with Platynosomum fastosum?

Answer 15

Biliary damage and bile obstruction.

Question 16

How is Babesia canis transmitted?

Answer 16

Tick vector.

Question 17

What are the forms of Toxoplasma gondii?

Answer 17

• Oocysts * Bradyzoites * Tachyzoites.

Question 18

What are the potential routes of transmission for Toxoplasma gondii?

Answer 18

• Ingestion of sporulated oocysts * Undercooked meat * Blood transfusion.

Question 19

What is the life cycle of Cryptosporidium spp.?

Answer 19

Oocysts ingested, excyst in intestines, merozoites released.

Question 20

What are the diagnostic methods for Cryptosporidium spp.?

Answer 20

• Fecal flotation * Fecal smear * ELISA.

Question 21

What are the symptoms of Trypanosoma cruzi infection?

Answer 21

• Sudden death * Cardiac arrhythmia * Organomegaly.

Question 22

What is the transmission method for Leishmania spp.?

Answer 22

Infected sandflies.

Question 23

What is the diagnosis for Cytauxzoon felis?

Answer 23

Blood smears showing ring forms.

Question 24

What is the zoonotic potential of Toxoplasma gondii?

Answer 24

Extreme, especially for pregnant women.

Question 25

Fill in the blank: The intermediate host for the salmon poisoning fluke is _______.

Answer 25

Freshwater snail.

Question 26

True or False: Schistosomes are dioecious.

Answer 26

True.