Heart-worm in Cats and Dogs

Question 1

State three facts about the lifecycle of HW:

Answer 1

• Live 3-5 years
• Transmitted as L3
• Vector is mosquito

Question 2

Contrast the clinical presentation of HW in cats versus dogs:

Answer 2

• Dog = RSCHF (liver in RV and PA)
• Cats = either acute presentation (worms dying and associated inflammation) OR chronic – HARD (heart-worm associated respiratory disease – presents in a similar way to asthma)

Question 3

What is the diagnostic method of choice for heart-worm in dogs?

Answer 3

• heart-worm antigen test – detects adult female worms

Question 4

Describe the treatment protocol for heart-worm in dogs:

Answer 4

• Melarsomine – single injection followed by 2 injections 24 hours apart BUT 4-6 weeks later

Question 5

Name one oral product that could be used to treat heart worm:

Answer 5

• Ivermectin