Circulatory Nematodes

Question 1

What species of Circulatory Nematodes is known as Heartworm

Answer 1

Dirofilaria immitus

Question 2

Dirofilaria immitus hosts

Answer 2

canine, feline/ ferret, and human

Question 3

Why are felines and ferrets not an infection source of Dirofilaria immitus?

Answer 3

Heartworms can only reproduce in canines

Question 4

Where do you fine Dirofilaria immitus within its host?

Answer 4

Adults in Right Ventricle/ Pulmonary Arteries

Question 5

Aberrant sites of the Heartworm

Answer 5

Subcutaneous, eye, CSN, and lungs

Question 6

What do Heartworms produce instead of eggs

Answer 6

Microfilariae

Question 7

What is the prepatent period of Dirofilaria immitus

Answer 7

6 months

Question 8

Which diagnostic test differentiates between the heart worm and Acanthocheilonema reconditum?

Answer 8

Knott’s test

Question 9

What characteristics do the Acanthocheilonema reconditum have that a heartworm does not?

Answer 9

Blunt head and hooked tail

Question 10

What are 4 diagnostic tests for heartworm?

Answer 10

1. Modified Knott’s (Formalin/Centrifuge)
2. Hematocrit Tube (Buffy Coat)
3. Blood-Saline Prep (Microfilaremic)
4. ELISA (Antigen/Antibody)