Cutaneous larva migrans review highlights hookworm’s human risk
Bottom line
Cutaneous larva migrans is getting fresh attention in the dermatology literature as a travel-associated zoonotic skin disease tied closely to dog and cat hookworms. In a new review in Dermatologie, Marcellus Fischer describes cutaneous larva migrans as the most frequent parasitic tropical dermatosis imported by travelers returning from tropical and subtropical regions, most often after beach exposure in Southeast Asia, Central and South America, or the Caribbean. The condition is typically caused when hookworm larvae shed in the feces of infected dogs and cats, especially Ancylostoma braziliense, penetrate exposed human skin and create intensely itchy, serpiginous tracks. CDC guidance similarly identifies zoonotic hookworm as common in dogs and cats, spread through contaminated sand or soil, and usually diagnosed clinically based on the characteristic lesion pattern plus exposure history. (cdc.gov)
Why it matters: For veterinary professionals, the review is a reminder that a familiar small-animal parasite remains a visible One Health issue, especially when pet parents travel with animals or ask about zoonotic risks after vacations. CDC materials for veterinarians note that zoonotic hookworm infections are not nationally reportable in the United States, so the true human burden is unclear, but cases continue to occur, particularly in southeastern and Gulf Coast states. The practical message for clinics is straightforward: regular fecal exams, timely deworming, prompt feces cleanup, and counseling pet parents about contaminated sand and soil all remain core prevention tools. (stacks.cdc.gov)
What to watch: Expect continued emphasis on travel medicine, beach exposure prevention, and routine parasite control as clinicians connect human dermatology cases back to dog and cat hookworm reservoirs. (cdc.gov)
Key facts
- Condition
- Cutaneous larva migrans
- Also called
- Creeping eruption
- Review source
- Dermatologie
- Most common setting
- Travelers returning from tropical and subtropical regions
- Common exposure
- Beach exposure in Southeast Asia, Central and South America, or the Caribbean
- Main cause
- Hookworm larvae in feces of infected dogs and cats
- Species most often implicated
- Ancylostoma braziliense
- Typical diagnosis
- Clinical, based on lesion pattern and exposure history
- U.S. veterinary note
- Not nationally reportable; cases continue, especially in southeastern and Gulf Coast states
A new review in Dermatologie is putting cutaneous larva migrans back in focus as a classic but still relevant zoonotic disease at the intersection of travel medicine, dermatology, and companion-animal parasite control. The condition, often called creeping eruption, is most commonly seen in travelers returning from tropical and subtropical destinations after skin contact with contaminated sand or soil. Fischer’s review frames it as the most frequent parasitic tropical dermatosis imported by travelers worldwide. (pubmed.ncbi.nlm.nih.gov)
The background is familiar to veterinarians, but easy to overlook in day-to-day practice. Cutaneous larva migrans develops when animal hookworm larvae in contaminated environments penetrate exposed human skin. CDC says zoonotic hookworm is common in dogs and cats, and that people are typically exposed while walking barefoot or sitting on contaminated soil or sand. Beach settings are a recurring risk factor, which helps explain why returning travelers are so often represented in case series and reviews. (cdc.gov)
The organisms most often implicated are dog and cat hookworms, especially Ancylostoma braziliense, though CDC also notes that A. caninum and A. ceylanicum can be involved and may, in some cases, be associated with deeper migration or other syndromes beyond the skin. Clinically, the hallmark is intense pruritus followed by a raised, erythematous, serpiginous track that usually appears on feet, legs, or other exposed areas. Diagnosis is generally clinical rather than laboratory-based; CDC notes there is no serologic test for zoonotic hookworm infection, and skin biopsy is not sensitive enough to reliably find the migrating larva. (cdc.gov)
Although most infections resolve on their own within weeks, they are far from trivial for affected patients. CDC notes that lesions can persist for several weeks, severe itching is common, and medications may be used in more serious cases. Rare complications can include deeper tissue involvement, eosinophilic enteritis, ocular larva migrans, or pulmonary manifestations, depending on the species and extent of migration. That broader clinical spectrum matters because it reinforces that “just a skin lesion” can still represent a meaningful zoonotic exposure with public health implications. (cdc.gov)
Direct outside commentary on Fischer’s review was limited in the available public sources, but the broader expert consensus is consistent. CDC’s clinician-facing materials describe cutaneous larva migrans as a clinical diagnosis linked to characteristic tracks and exposure history, while travel medicine references continue to list it among the most common parasitic skin conditions in returned travelers. Older veterinary public health guidance from CDC also emphasizes that practicing veterinarians are in an “ideal position” to reduce human risk through fecal testing, anthelmintic treatment, and client counseling, a point that remains relevant even if the guidance itself is longstanding. (cdc.gov)
Why it matters: For veterinary teams, this is less about a new pathogen than a renewed reminder that routine parasite prevention has visible human consequences. Cutaneous larva migrans may present first in human medicine, but its reservoir is often a dog or cat population with ongoing hookworm transmission and environmental contamination. CDC’s veterinary guidance notes that most U.S. cases are diagnosed in the southeastern and Gulf Coast states, and that hookworm eggs can become infective in soil quickly under the right conditions. That makes preventive care, prompt feces removal, and clear conversations with pet parents especially important in warm, humid regions, in households with young animals, and before travel to beach destinations. (stacks.cdc.gov)
The article also fits into a larger One Health story. Because cutaneous larva migrans is not nationally reportable in the United States, the true burden is uncertain, which means prevention may be undervalued simply because surveillance is limited. Veterinarians may not diagnose the human case, but they can reduce the upstream risk by controlling hookworms in pets and by educating pet parents that contaminated environments, not just direct animal contact, drive transmission. (stacks.cdc.gov)
What to watch: Watch for more travel-linked case reports, continued attention to zoonotic hookworm in beach and warm-climate settings, and ongoing pressure on veterinary practices to frame routine deworming as both pet care and public health prevention. (cdc.gov)