Parasite myth-busting sharpens year-round prevention message: full analysis

Parasite prevention is getting another myth-busting push in veterinary media, with dvm360’s Vet Blast episode “399: Fact or Fiction–Parasites and Protection” and a recent VETgirl podcast on heartworm misinformation both reinforcing a familiar but still unevenly adopted message: year-round prevention matters, and assumptions about “safe” pets often don’t hold up. The dvm360 episode features Lindsay Starkey, DVM, PhD, DACVM, while the VETgirl episode is sponsored by the American Heartworm Society, underscoring how closely continuing education and professional organizations are aligned on this issue. (music.amazon.com)

The backdrop is persistent confusion among pet parents about which animals are actually at risk, when prevention is necessary, and whether geography or indoor living meaningfully lowers exposure. dvm360’s related coverage says Starkey’s recent programming has focused on misconceptions tied to patient lifestyle, common parasites of concern, zoonotic implications, compliance hurdles, and emerging resistance concerns. In parallel, the American Heartworm Society continues to anchor its client education around “Think 12,” its long-running campaign calling for 12 months of prevention and annual testing. (dvm360.com)

That messaging is backed by current guidance. In the society’s revised 2024 canine heartworm guidelines, AHS recommends annual antigen and microfilaria testing. Its public-facing resources also continue to state that there is no true “off-season” for heartworm prevention and that year-round prevention is recommended for dogs and cats. AHS materials further emphasize that cats present a special challenge because prevention is the only protection; there is no approved adulticide treatment for feline heartworm disease. (intranet.amerivet.com)

The broader parasite landscape also supports the more aggressive preventive stance. CAPC’s 2025 Pet Parasite Forecast says heartworm, Lyme, anaplasmosis, and ehrlichiosis are continuing to spread in the U.S., with heartworm risk extending across much of the Southeast, up the Atlantic coast and Mississippi corridor, and into parts of the central and western states, including areas such as New Mexico, Colorado, Wyoming, Montana, North Dakota, and Northern California. CAPC explicitly notes that “low risk doesn’t mean no risk,” and says year-round prevention remains essential. (animalhealthdigest.com)

Industry commentary around feline care adds another layer. In a February 2025 dvm360 interview, Starkey said one of the biggest misconceptions is that indoor or predominantly indoor cats have little to no vector exposure because fleas, mosquitoes, and ticks “can’t come inside.” That’s a useful example of how parasite counseling is shifting from seasonal reminders to more nuanced risk communication: not just whether a pet goes outdoors, but how vectors enter homes, how households share exposure, and how missed doses or low compliance can undo prevention plans. (dvm360.com)

Why it matters: For veterinary professionals, the news value here is in the convergence of education, guidelines, and surveillance. Podcasts like these may sound basic on the surface, but they reflect a practical reality in clinic: parasite prevention still fails most often at the level of communication and adherence, not lack of available tools. When practices can connect current guidance, local forecast maps, and specific myth correction, they’re better positioned to improve uptake, support annual testing, and frame prevention as both animal and public health protection. The zoonotic angle also matters, particularly when teams are trying to explain why parasite control belongs in preventive care discussions even for pets with limited outdoor exposure. (dvm360.com)

There’s also a business and workflow implication. Standardized parasite protocols, technician-led education, and localized risk discussions can help reduce mixed messages between clinicians and staff. That may be especially important in feline medicine, where dvm360 reported AHS data showing only 5% of cats are on year-round heartworm prevention, a gap that suggests substantial room for better preventive uptake and better pet parent education. (dvm360.com)

What to watch: The next development to monitor is whether these educational pushes translate into measurable changes in testing compliance and year-round preventive use, particularly in cats and in regions newly flagged as elevated risk by CAPC’s 2025 forecast. Updated AHS materials, CAPC maps, and additional CE content from outlets like dvm360 will likely shape how practices refine their messaging through the rest of 2026. (animalhealthdigest.com)