Vegetation varies widely among different geographic regions
The most notorious allergenic plant in Europe is primrose obconics, while in the United States it is poison ivy (American poison ivy).
Allergens in the genus Toxicodenero are Oroshan, which are found in poison ivy, poison oak, and poison sumac. The allergen in primrose is primin.
Several plants are capable of causing contact dermatitis.
Some of these plants are used as food, and can cause oral symptoms.
Other plants are used medicinally, and can cause contact dermatitis as an unwanted side effect.
The frequency of dermatitis caused by plants depends on the location, occupation, lifestyle, including leisure activities, and skin sensitivities of the patient.
Experiments have been carried out with plants provided by the patient, these plants should wherever possible be identified by a botanist.
Different parts of this plant are used.
When the suspect plant is not known to be a susceptible plant, the test should also be carried out among at least 10 individuals from the control group.
However, the most practical method is to use the plant itself rather than an extract, as extracts are often commercially available year-round.
However, with the passage of time and the evaporation of the more volatile solvent, the concentration of the allergen and its sensitivity and sometimes the stimulatory properties increase.
In fact, along with the plants themselves, the stimulus or false positive reaction or the extracts are frequent.
In addition, tests have resulted in primary sensitivity to plants, woods, or extracts and pines.