title: Sunlight and the plant: a toxic combination: severe phytophotodermatitis from Cneoridium dumosum.
abstract: A severe case of phytophotodermatitis occurred in a patient who had spent several hours walking through an area densely populated with Cneoridium dumosum. This patient's co-worker experienced a similar reaction after undergoing patch testing of an area of skin and exposing it to sunlight. Voluntary patch testing by one of the authors produced a reaction consistent with the other two cases. Approximately twenty other cases were described by a U.S. Fish and Wildlife Service ranger in students who came into contact with the plant during a field trip with him to Baja California, Mexico. Cneoridium dumosum is a common native bush that grows in the chaparral vegetation zone of southern California and Baja California, Mexico. In a search of Poisindex, Medline, Agris International, and Agricola databases, no previous reports of toxic exposures were found.
authors.affiliation: San Diego Regional Poison Center, UCSD Medical Center 92103-8925.
authors.forename: C L
authors.initials: CL
authors.lastname: Tunget
authors.forename: S G
authors.initials: SG
authors.lastname: Turchen
authors.forename: A S
authors.initials: AS
authors.lastname: Manoguerra
authors.forename: R F
authors.initials: RF
authors.lastname: Clark
authors.forename: D E
authors.initials: DE
authors.lastname: Pudoff
mesh_terms: D001132:Arm; D001768:Blister / Q000209:etiology; D002140:California; D017454:Dermatitis, Photoallergic / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico; D010947:Plants, Toxic; D013472:Sunlight / Q000009:adverse effects*