RVT Journal Quiz: Volume 46, Issue 2, Article 3 - Macrocyclic lactone resistant heartworm…. Should we be worried?

RVT Journal Quiz: Volume 46, Issue 2, Article 3 - Macrocyclic lactone resistant heartworm…. Should we be worried?

Continuing to learn after achieving RVT status is essential for the individual and the advancement of the profession. Ontario RVTs can earn one (1) Continuing Education (CE) credit by reading the CE articles in the RVT Journal, or watching recorded sessions of OAVT presentations, and submitting the successfully completed corresponding quizzes.

If you obtain a score of 8 out of 10 (80%) or higher, you will receive a confirmation email which OAVT members can use as acceptable proof for their online CE record.

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1. What are the key stages of the heartworm life cycle that macrocyclic lactones target?
2. What are commonly known reservoir hosts of D. immitis in Ontario?
3. Macrocyclic lactones bind with high affinity to:
4. Heartworm preventives on the market may have differences in dosing requirements at the end of the transmission season, with some milbemycin-containing products requiring as many as six doses after the last exposure to mosquitoes.
5. Which of the four major macrocyclic lactones have label claims requiring more than one dose at the end of the transmission season?
6. What is the number one reason for lack of efficacy reports for heartworm preventives?
7. A dog with adult heartworm infection will have permanent, irreversible damage to the pulmonary vessels even before an antigen test can turn positive.
8. If a case of resistant heartworm is suspected, the best method to determine this is:
9. Which molecule has unique PK characteristics such as: long half-life, highly lipophilic which are ideal when killing the L3/L4 stages of heartworm?
10. What are the most important factors contributing to the rise of heartworm disease?