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Disorders That Mimic Spider Bites

Category

Examples

Insect bites

Ant bites

Bedbug bites

Flea bites

Fly bites

Reduviid (eg, assassin, wheel, kissing) bug bites

Other arachnid bites

Mite bites

Tick bites

Skin disorders

Erythema chronicum migrans

Erythema nodosum

Leukocytoclastic vasculitis

Pyoderma gangrenosum

Sporotrichosis

Toxic epidermal necrolysis

Infections

Chronic herpes simplex

Cutaneous anthrax

Disseminated gonococcal infection

Methicillin-resistant Staphylococcus aureus

Septic emboli in endocarditis or illicit IV or injection drug use

Trauma

Self-inflicted injuries

Subcutaneous medication or illicit drug injections

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