Survey on canine hookworms: Knowledge, perceptions and practices among U.S. veterinarians

Canine hookworms (Ancylostoma caninum) are highly prevalent in pet dogs in the United States of America (U.S.). They pose a significant health risk to infected dogs and are also a potential risk to humans as zoonotic agents. Veterinarians play a crucial role in managing this threat through the diagnosis and treatment of infections in pet dogs. However, the rising incidence of anthelmintic resistance in U.S. hookworm populations necessitates increased awareness among veterinarians. To determine U.S. veterinarian's knowledge, perceptions and practices about canine hookworms, a cross-sectional online survey was administered between February and December 2022. 208 veterinarians from 43 states participated in the study. Only 65 % of veterinarians reported awareness of hookworm prevalence. Hookworm infected dogs were encountered more frequently in the South than in Western states. Veterinarians perceived that hookworms were present in all breeds without breed predilection followed by mixed breeds, pit bulls and hound breeds. Most respondents reported that infections were rarely symptomatic, highlighting the importance of diagnostic testing. In-clinic diagnostic modalities were most preferred. Fenbendazole and pyrantel pamoate were the most commonly used anthelmintics. Most veterinarians followed up on infected dogs but retesting time after treatment varied. Awareness of multi-drug resistant hookworms was high but encountering persistent hookworm cases was lower. Veterinarians frequently educated clients about hookworms and prevention, but less about the zoonotic potential. This study provides insights for improving awareness, diagnostics, treatment protocols, and client education regarding canine hookworms in the U.S.. Overall, veterinarians play an active role in hookworm prevention and control.