You are correct. The patient had the classic pruritic serpiginous tracks that migrated 1 to 2 cm daily, confirming the clinical dx of cutaneous larva migrans (CLM). CLM is a parasitic disease that occurs in tropical and subtropical regions. It’s caused by skin penetration of hookworm larvae that usually infest cats, dogs, and other animals. After an incubation period of 1 to 5 days, tracks typically appear on the feet or other unprotected parts of the body that might come into contact with contaminated animal feces. Vesiculobullous lesions occur in 9% to 15% of cases and sometimes reach a large size (several cm in diameter). Bacterial superinfection is possible, commonly as a result of lesions being scratched. Anthelmintic treatments include ivermectin and oral albendazole. This patient received antihistamine and anthelmintic tx, and complete healing occurred within a few days.

BMJ 2021;372:n231