Problem-based parasitology -- a heartworm teaching module

Abstract

A case-based, computerized teaching module has been developed based on a 4 year old spayed female Belgian Malinois presented to Cornell University’s Hospital for Animals cardiology service for heartworm infection. The dog came from a Florida animal shelter. Physical examination and clinicopathologic examination were largely unremarkable. Thoracic radiography revealed mild changes consistent with heartworm disease. Thoracic CT imaging with intravenous contrast enabled the visualization of lesions not apparent radiographically. Treatment with melarsomine was initiated following a six week pre-adulticide regimen consisting of doxycycline and ivermectin. No complications were encountered during the course of treatment. Imaging performed one month after the final melarsomine administration showed sub-total resolution of the pulmonary nodules; the dog was clinically well and antigen testing was negative. This interactive tool made possible by collaboration between Cornell and Texas A&M’s veterinary colleges and Zoetis will provide a thorough overview of the diagnosis, staging, pathophysiology, treatment, and follow-up of canine heartworm disease.