Ascarids

Question 1

Which species of Ascarids is called “non-migrating”

Answer 1

Toxascaris leonina

Question 2

Which species of Ascarids affects dogs?

Answer 2

Toxocara canis

Question 3

What species of Ascarids affects cats?

Answer 3

Toxocara cati

Question 4

The ascarid species Baylisascaris procyonis affects…

Answer 4

Raccoons and dogs

Question 5

Describe the morphology of T. canis

Answer 5

Thin, rounded cervical alae

Question 6

Describe the morphology of T. cati

Answer 6

Broad, rounded cervical alae

Question 7

Describe the morphology of T. leonina

Answer 7

Triangular shaped cervical alae

Question 8

Where are adult ascarids located in the human body

Answer 8

Small intestine

Question 9

Where are the lips located on ascarids?

Answer 9

Anterior end

Question 10

What is the length of an adult female T. canis

Answer 10

5 inches

Question 11

What is the length of an adult female T. cati?

Answer 11

3 inches

Question 12

What is the length of an adult female T. leonina

Answer 12

2.5 inches

Question 13

Describe the ova for T. canis

Answer 13

Round, rough exterior, thick-shelled, unicellular, dark interior

Question 14

Describe the ova for T. cati

Answer 14

Same as T. canis but smaller

Question 15

Describe the ova of T. leonina

Answer 15

Oval-shaped, smooth shell, unicellular, light on the inside

Question 16

Are ascarids attached in the GIT?

Answer 16

NO

Question 17

How long does it take for T. canis to become infective?

Answer 17

4 weeks

Question 18

What is the prepatent period for T. canis?

Answer 18

4 weeks

Question 19

How long does it take T. cati to become infective

Answer 19

4 weeks

Question 20

What is the pre-patent period for T. cati

Answer 20

8 weeks

Question 21

How long does it take for T. leonina to become infective

Answer 21

1 week

Question 22

What is the pre-patent period for T. leonina

Answer 22

8-10 weeks

Question 23

Describe the 4 stages of ascarid development in the pre-parasitic stage

Answer 23

1) unicellular egg
2) L1 larvae develops in egg
3) molts to L2 larvae in egg
4) Molt to L3 in egg

Question 24

Describe the 4 stages of ascarid development in the parasitic stages

Answer 24

1) L3 egg is ingested and hatches
2) Molts to L4
3) Molts to L5
4) Matures into adult males and females

Question 25

Can ascarid infection be transplacental in puppies?

Answer 25

Yes

Question 26

What are the organs affected and clinical signs of ascarid migrating larva infections in puppies?

Answer 26

Liver and no clinical signs

Question 27

What are the organs affected and clinical signs of ascarid adult worm infections in puppies?

Answer 27

1) Lung- coughing, dyspnea, and sudden death 2) Stomach- vomiting 3) Small intestines- mucoid diarrhea 4) General Body- Pot bellied, crying, rough coat, lack of weight gain, obstructive jaundice

Question 28

What are the organs affected and clinical signs of ascarid aberrant larvae in puppies?

Answer 28

1) CNS- meningitis like signs

Question 29

How do you diagnose an ascarid infection?

Answer 29

Fecal flotation

Question 30

What drugs are used to treat ascarid infections?

Answer 30

1) Pyrantel pamoate 2) Panacur

Question 31

What two infections in humans can T. canis cause?

Answer 31

Visceral Migrans Larvae & Ocular Migrans Larvae

Question 32

Which species does T. leonina affect?

Answer 32

Dogs, cats & wild canids/felines