Parasitology

Long-duration flea and tick collars can be a valuable, practical component of comprehensive parasite prevention.

The American Heartworm Society has released the results of its latest survey mapping where the parasite's presence is growing, declining, or staying the same.

Global veterinary leaders unite in a Prevention Pledge urging year-round parasite control as fleas, ticks, and worms spread, raising emerging disease risks for pets and people.

Global survey finds many pets get parasites, yet owners want clearer prevention advice; vets urge year‑round flea, tick and heartworm protection.

Fluralaner for extended-release injectable suspension (Bravecto Quantum; Merck Animal Health) is indicated for treating flea and tick infestations in dogs.

The FDA has indexed Faunamor, an antiparasitic and antimicrobial treatment for white spot disease (Ichthyophthirius multifiliis) in ornamental finfish, making the drug legally available in the United States.

Once eradicated from the US in the 1960s, New World screwworm is again driving prevention efforts as cases move closer to the US-Mexico border.

In September 2025, the FDA issued a conditional approval for another drug indicated to prevent and treat New World screwworm (NWS) larval infestations in cattle.

Although the parasite has not yet been detected in the US, officials warn that its northward movement poses a serious risk to livestock and wildlife.

The 2023 ACVIM leptospirosis consensus marks a turning point in canine care, shifting vaccination to a universal core protocol while updating diagnostic standards and shortening handling precautions.

A new study from Australia reveals the complex evolutionary history of canine heartworms, challenging previous beliefs about their global spread and origins.

Veterinarians gain a new FDA-approved generic dewormer, Defendazole, for the treatment and control of various worms in cattle and goats.

Tips from Susan E. Little, DVM, PhD, DACVM (Parasitology), that break down what really matters in tick-borne disease management.

The American Heartworm Society has generated data-driven maps every 3 years since 2001.

Christopher Lee, DVM, MPH, DACVPM, DACVM (Parasitology), explains why ticks and other parasites are expanding their range, why year-round isoxazoline use matters, and why indoor pets still face parasite risk.

Christopher Lee, DVM, MPH, DACVPM, DACVM (Parasitology), explains that indoor pets still face vector exposure and that year-round isoxazoline protection reduces parasite burden and helps protect household members.

Credelio Quattro (Elanco) was previously approved by the FDA for treatment of infestation for 6 other parasites in dogs.

Susan E. Little, DVM, DACVM (Parasitology), explains how timing shapes transmission, how to remove ticks safely, what to do with an antibody-positive but well dog, and why year-round tick control protects pets and people.

Christopher Lee, DVM, MPH, DACVPM, DACVM (Parasitology), argues for year-round isoxazoline use, noting that interrupting the flea life cycle protects both pets and people.

Susan Little, DVM, PhD, DACVM (Parasitology), explains how transmission timing differs by pathogen, demonstrates safe tick removal, and shows why year-round systemic tick control plus targeted vaccines best protect pets.

A concise Q&A for veterinarians summarizing the identification, reporting, treatment, prevention, and practical next steps as the New World screwworm approaches the US border.

The FDA determined that Credelio Cat may be effective in treating New World screwworm infestations in cats and kittens.

The program is used to combat New World screwworm, a global health threat.

The organization elected new officers and board members during its 2025 Triennial Heartworm Symposium.