Ch 45 Parasitology Part 2

Question 1

What is Ollulanus tricuspis?

Answer 1

The feline trichostrongyle.

Question 2

How is vomiting in cats mostly identified?

Answer 2

By examination of vomitus with a dissecting microscope.

Question 3

What type of worms are Strongyloides sp.?

Answer 3

Intestinal threadworms.

Question 4

What is unique about the reproductive structure of Strongyloides sp.?

Answer 4

Only a parthenogenetic female is parasitic; no parasitic males.

Question 5

What is the characteristic feature of larvae in Rhabditoidea?

Answer 5

They have a club-shaped esophagus.

Question 6

What diagnostic method is used for Rhabditoidea?

Answer 6

Fresh fecal flotation diagnosis.

Question 7

Where are adults of Metastrongyloidea typically found?

Answer 7

In the bronchioles, mostly in nodules in the lung parenchyma of sheep and goats.

Question 8

What happens to the eggs of Metastrongyloidea in the host?

Answer 8

Eggs develop in the lungs and the first stage larvae are coughed up, swallowed, and passed out with the feces.

Question 9

Where are Trichuroidea typically found?

Answer 9

In the cecum and colon.

Question 10

What is the common canine whipworm?

Answer 10

Trichuris vulpis.

Question 11

What are the rare feline whipworms?

Answer 11

T. campanula and T. serrata.

Question 12

What is the egg characteristic of Trichuris sp.?

Answer 12

Thick, yellow-brown symmetrical shell with polar plugs at both ends.

Question 13

What is Capillaria plica also known as?

Answer 13

Pearsonema plica.

Question 14

Where is Capillaria plica found?

Answer 14

In the urinary bladder of dogs and cats.

Question 15

What is Trichinella spiralis associated with?

Answer 15

Raw or undercooked pork.

Question 16

What is the human pinworm?

Answer 16

Enterobius vermicularis.

Question 17

What is the pinworm of horses?

Answer 17

Oxyuris equi.

Question 18

Are pinworms parasites of dogs and cats?

Answer 18

False; they are not parasites of dogs and cats.

Question 19

What are Habronema sp. and Draschia megastoma parasites of?

Answer 19

Horses.

Question 20

Where are larvae of Habronema sp. found?

Answer 20

In skin lesions or summer sores.

Question 21

What is Thelazia californiensis?

Answer 21

Eyeworm of dogs and cats.

Question 22

What is the life cycle requirement of Dracunculoides?

Answer 22

A copepod intermediate host.

Question 23

What is Dioctophyma renale commonly known as?

Answer 23

Giant kidney worm of dogs.

Question 24

Where does Dioctophyma renale infect?

Answer 24

The right kidney.

Question 25

What is Dirofilaria immitis commonly known as?

Answer 25

Canine heartworm.

Question 26

What is the most important parasite of the vascular system in domestic animals in the United States?

Answer 26

Dirofilaria immitis.

Question 27

What is the prepatent period for Dirofilaria immitis?

Answer 27

6 months.

Question 28

What methods are used for diagnosing Dirofilaria immitis?

Answer 28

* Observing microfilariae in blood samples * Modified Knott test * Commercially available filter techniques * Immunodiagnostic tests.

Question 29

What are the developmental stages of nematodes?

Answer 29

* Egg * Four larval stages * Sexually mature adult.

Question 30

What are the infective stages of nematodes?

Answer 30

* An egg containing a larva * A free-living larva * A larva within an intermediate host.

Question 31

What is the difference between direct and indirect lifestyle in nematodes?

Answer 31

Direct lifestyle has no intermediate host; indirect lifestyle requires an intermediate host.

Question 32

How can nematode parasites be transmitted to new definitive hosts?

Answer 32

* Ingestion * Skin penetration * Ingestion of the intermediate host * Deposit on the skin by an intermediate host.

Question 33

What are some common nematode parasites of dogs and cats?

Answer 33

* Toxocara sp. * Ancylostoma sp. * Trichuris sp. * Dirofilaria immitis.