Spreading the Word
Typical Appearances
First Aid
Medical Care
Risk Management

Total Avoidance
Reduced Risk
Calculated Risk
Morro Bay State Park
North of MBSP
South of MBSP




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Risk Management

Principal:  Soap and water float the oil away, and destroy some of the allergen: 

  • Warn the people who handle your laundry. Contaminated clothing should be bagged, or put directly in a washing machine. Bagged clothing should be put in a machine without being touched.
  • Wash pets and horses. Dont touch pets that are running free.
  • Clean leather carefully. For example, use saddle soap. 

Japanese and Chinese lacquers are allergenic.

Principal:  Poison-oak belongs to the plant family Anacardiaceae. About 30% of Anacardiaceae have poisonous sap. This plant family is mainly composed of tropical trees. Among them are the mango, cashew, pistachio, and Lithraea, a lumber tree in South America.

  • Sap from the stems of mangoes is dangerous. Highly allergic individuals should avoid the fruit. Less sensitive people can choose mangoes that are free of depressed, sharp-margined black urushiol burns. All authors recommend discarding the peeling. Some authors additionally recommend wearing gloves while peeling the fruit.
  • Cashews are roasted to drive of the allergenic oil. Inadequately heated nuts turn black.
  • Pistachios are more weakly allergenic. Most people can consume them without problems.
  • About 30% of people in Paraguay and adjacent Brazil are sensitive to oils in the wood used for making furniture there, Lithraea. Thorough drying of Lithraea lumber, followed by a coat of polyurethane, minimizes the problem.

Risk Management


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