The Companion Animal Parasite Council issued a statement addressing reports about problems of resistance to heartworm prevention drugs in dogs.
“There is a growing body of anecdotal reports and experimental evidence that currently available heartworm preventives (macrocyclic lactones) may not be completely efficacious in preventing heartworm infection in dogs. Reports of resistance for dogs in the region have resulted in confusion about how best to prevent infection in veterinary patients.”
“At this time, reports of resistance appear to be confined to dogs from the south-central United States where dogs have become infected while on preventives or remain infected following treatments.”
To read the full report visit http://www.capcvet.org/downloads/Heartworm%20Preventive%20Efficacy.pdf
The CAPC did not provide any recommendations to pet owners.
Wishing you and your pet(s) the best,
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