Cercarial dermatitis
Background
Life-cycle of swimmers itch.
- Also known as "Swimmer's itch"
- Skin exposed to freshwater schistosomes or coastal water clam diggers itch
- Cercaria (non-human schistisomes)
- Not be confused with Seabather's eruption (caused by the larval stage of cnidarians (e.g., jellyfish))
Dermatitis Types
- Atopic dermatitis
- Candida dermatitis
- Cercarial dermatitis
- Contact dermatitis
- Dermatitis herpetiformis
- Diaper dermatitis
- Dyshidrotic dermatitis
- Neonatal seborrhoeic dermatitis
- Nummular dermatitis
- Perianal streptococcal dermatitis
- Perioral dermatitis
- Poison Oak, Ivy, Sumac dermatitis
- Seborrheic dermatitis
- Stasis dermatitis
Clinical Features
Cercarial dermatitis on lower legs, four days after spending a day in the shallows of a lake.
- Occurs on the exposed skin outside of close-fitting garments
- Versus Seabather's eruption, which is generally under the garments worn by bathers and swimmers (where the organisms are trapped after the person leaves the water)
Differential Diagnosis
Travel-related skin conditions
- Papules
- Insect bites
- Scabies
- Seabather's eruption
- Cercarial dermatitis (Swimmer's Itch)
- Sub Q Swelling and Nodules
- Myiasis
- Tungiasis
- Loa loa
- African Trypanosomiasis
- Onchocerciasis
- Ulcers
- Tropical pyoderma
- Leishmaniasis
- Mycobacterium marinum
- Buruli ulcer
- Dracunculiasis (Guinea Worm disease)
- Linear and Migratory Lesions
- Cutaneous larvae migrans
- Photodermatitis
See also domestic U.S. ectoparasites
Evaluation
- Typically a clinical diagnosis
Management
- Supportive
- Antihistamines for pruritus
- +/- topical corticosteroids
See Also
References
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