Toxocara Canis

Question 1

In which part of the body to the toxocara canis eggs hatch??

Answer 1

In the Duodenum then follow two distinct migratory pathways = Trachea or somatic

Question 2

What happens to the toxocara larva once they reach the lungs of a dog????

Answer 2

Maturation to L3 takes place they ascend to respiratory track via avioli , bronchioles and trachea they are coughed up from the lungs them swallowed into the digestive system

Question 3

Which type of migration dose most of the larva in young puppies undergo??

Answer 3

Tracheal migration as they are coughed up from lungs and then swallowed to continue the migration stage

Question 4

When do larva that have ended up dormant in the muscle tissue become active again??

Answer 4

After six weeks of gestation dormant larvey renter the circulation across the placenta to develop in puppy’s

Question 5

Where do Lara that move by somatic migration usually end up??

Answer 5

Penetrate duodenal wall remain in blood then penetrate they are distributed through tissues - tracheal route in adults to the intestines

Question 6

How do larva from the bitch enter the puppies during pregnancy??

Answer 6

Passed to suckling pup via the milk and develope directly to adults worms in puppy’s intestines picked up from environment and intermediate host by mother

Question 7

Please explain what Ocular larva migrans is?

Answer 7

The presence of larva in the eye can cause blindness

Question 8

Please explains why it is quite easy for people to ingest toxocara eggs??

Answer 8

They can survive in the environment for years on coat of pets,toys or food that humans ingest eggs are sticky

Question 9

How many Irish school children are suspects of suffering from ocular larval migrans??

Answer 9

1 in 10,000

Question 10

Name two treatments for roundworm ( Including toxocara canis) in dogs??

Answer 10

Anthelmintics

Advocate or coronal

Question 11

How do tapeworms attach to the intestines of animals?

Answer 11

The scolex (head) attaches to intestinal mucosa adult tapeworm developes

Question 12

What are the clinical signs of a tapeworm infestation in dogs and cats??

Answer 12

Motile segments on coat, anal irritation intestinal disturbance in heavy infections

Question 13

One intermediate host for Dipylidium caninum??

Answer 13

Flea

Question 14

How should Dipylidium caninum be treated??

Answer 14

PrZequantel kills worms + flea treatment

Question 15

Name two Taenia species that effect the dog and have the rabbit as their intermediate host??

Answer 15

• Tania Pisiformis

- Tania Serialis

Question 16

Explain how you prevent a dog from getting these species of tapeworm??

Answer 16

Don’t allow them to hunt or consume under cooked meat

Question 17

In which part of the U.K. Is a dog more likely to get Echinococcus??

Answer 17

Wales

Question 18

Name 3 intermediate hosts for Echinococcus??

Answer 18

• Cows
• sheep
• pigs

Question 19

Name the tapeworm species which is not in the UK but is zoonotic ??

Answer 19

E. Multllocularis

Question 20

How long dose it take for a toxocara canis egg to become infective??

Answer 20

2 weeks they first have to undergo a maturation stage