Rydbergii poison ivy or poison ivy dermatitis toxicodendron. Medical search. Frequent questions

They are well known for causing urushiol-induced contact dermatitis, an itchy, irritating, and sometimes painful rash, in most people who touch them. (wikipedia.org)
Urushiol-induced contact dermatitis is the allergic reaction caused by poison ivy. (wikipedia.org)
A plant-based remedy cited to counter urushiol-induced contact dermatitis is jewelweed, though jewelweed extracts had no positive effect in clinical studies. (wikipedia.org)
Toxicodendron dermatitis is an allergic contact dermatitis (allergic phytodermatitis) that occurs from exposure to urushiol, a skin-irritating oil produced by members of the plant genus Toxicodendron . (medscape.com)
Toxicodendron dermatitis is the most common cause of contact dermatitis in the United States, exceeding all other causes combined. (medscape.com)
Toxicodendron, a term that means â€œpoisonous tree,â€ is the genus that includes the most common culprits in allergic plant contact dermatitis, such as poison ivy. (contemporaryclinic.com)
Allergic contact dermatitis: other allergens, such as gold or nickel, can cause a rash that resembles poison ivy. (contemporaryclinic.com)
Urushiol is an oily clear liquid in the plant's sap that will cause a severe allergic skin rash or contact dermatitis for most individuals. (geocaching.com)
It doesn't cause contact dermatitis like poison ivy, poison oak or poison sumac do.However fragrant sumac is a totally non-poisonous plant. (sachecucine.it)
Oleoresin, the allergen, causes a severe, delayed hypersensitivity or contact dermatitis 24 to 48 hours after contact with the plant. (pollenlibrary.com)
Plant-induced contact dermatitis is divided into 5 major categories. (medscape.com)
Plant products cause a variety of adverse cutaneous effects, and they are responsible for most cases of allergic contact dermatitis. (medscape.com)
In the United States, most cases of allergic contact dermatitis are due to Toxicodendron plants. (medscape.com)
This discussion of clinical manifestations and treatment options is a supplement to the material presented in Allergic Contact Dermatitis. (medscape.com)
Allergic contact dermatitis requires exposure and sensitization to the causative plant products. (medscape.com)
Allergic contact dermatitis due to poison ivy can occur in persons of any age, though infants and elderly individuals are reportedly less susceptible to poison ivy. (medscape.com)
Members of the family Anacardiaceae cause more cases of allergic contact dermatitis than those of all other plant families combined. (medscape.com)

Poison ivy is a type of allergenic plant in the genus Toxicodendron native to Asia and North America. (wikipedia.org)
Like poison ivy and poison sumac, poison oak is a member of the Rhus or Toxicodendron genus of plants. (ovhvac.org)
Poison-Ivy, Poison-Oak, Poison-Sumac (Toxicodendron) is a genus of the ANACARDIACEAE family. (pollenlibrary.com)
O. Ktze is used in recognition of Otto Kuntze, who transferred the epithet radicans from the genus Rhus to the genus Toxicodendron. (medscape.com)
Most allergenic family members belong to the genus Toxicodendron, and they possess a toxic oleoresin called urushiol. (medscape.com)
Rhus is the largest genus in the family Anacardiaceae, but it does not contain the allergenic plants, most of which belong to the genus Toxicodendron. (medscape.com)
The genus Toxicodendron includes common poison ivy (T radicans), western or northern poison ivy (Toxicodendron rydbergii), eastern poison oak (Toxicodendron toxicarium), western poison oak (Toxicodendron diversilobum), and poison sumac (Toxicodendron vernix). (medscape.com)
Poison sumac species (genus Toxicodendron, family Anacardiaceae) have white-to-green hanging fruits. (medscape.com)

Poison ivy ( Toxicodendron rydbergii ), poison oak ( Toxicodendron diversilobum ), and poison sumac ( Toxicodendron vernix ) are most common in North America. (medscape.com)
Poison oak is most common west of the Rockies, poison ivy to the east, and poison sumac in the southeast. (medscape.com)
Poison ivy, poison oak, and poison sumac grow in wooded or marshy areas throughout North America. (ovhvac.org)
the Western Poison ivy also referred to as poison oak, or poison sumac, however it is neither. (geocaching.com)
Sometimes confused with poison oak or poison sumac, Poison Ivy contains the same organic compound as the previous two that create its painful rash, urushiol. (geocaching.com)
Very few people are naturally immune to the effects of the urushiol found in Poison Ivy and its relatives Poison Oak, Poison Sumac, and the Chinese Lacquer tree. (geocaching.com)
Poison sumac (Toxicodendron vernix), despite its common name, is more closely related to poison ivy than it is to other Rhus species. (sachecucine.it)
This is Fragrant Sumac, Rhus aromatica, a cousin of poison ivy. (sachecucine.it)
It is a member of the Anacardiaceae family, which includes poison ivy, poison oak, and poison sumac. (sachecucine.it)
The leaf stems are the most common distinguishing factors.Leaves resemble those of its relative poison ivy, but fragrant sumac is not poisonous. (sachecucine.it)
Fragrant sumac is also different from Poison Sumac. (sachecucine.it)
The species poison sumac, native to the eastern U.S., is a shrub that can grow to 21 feet tall with leaves that have 7-13 leaflets and light, yellow-gray berries in the autumn. (pollenlibrary.com)
Poison sumac, which has 7-13 leaflets per leaf, is primarily found in wooded swampy areas. (medscape.com)

Formerly considered a single species, Toxicodendron radicans, poison ivies are now generally treated as a complex of three separate species: Toxicodendron radicans, Toxicodendron rydbergii, and Toxicodendron orientale. (wikipedia.org)
T. radicans is commonly eaten by many animals, and the seeds are consumed by birds, but poison ivy is most often thought of as an unwelcome weed. (wikipedia.org)
they are sometimes considered subspecies of Toxicodendron radicans: Toxicodendron orientale: found in East Asia. (wikipedia.org)
Toxicodendron radicans: found throughout eastern Canada and the United States, Mexico and Central America, Bermuda and the Bahamas. (wikipedia.org)
T. radicans vine with typical reddish "hairs" Flower detail, with bee Poison ivy on a roadside Leaves may be smooth or notched on the same plant. (wikipedia.org)
To the untrained eye, the poison ivy plant (Toxicodendron radicans) can often be difficult to notice as you're walking around in the woods. (ovhvac.org)
For example, the full binomial name of common poison ivy is Toxicodendron radicans (L.) O. Ktze. (medscape.com)
Young poison ivy plant Toxicodendron radicans. (medscape.com)
Mature poison ivy Toxicodendron radicans. (medscape.com)

Toxicodendron diversilobum, single grain. (pollenlibrary.com)
Toxicodendron diversilobum, multiple grains. (pollenlibrary.com)

Toxicodendron dermatitis occurs outside North America. (medscape.com)

Those affected can unknowingly spread the urushiol inside the house, on phones, door knobs, couches, counters, desks, and so on, thus in fact repeatedly coming into contact with poison ivy and extending the length of time of the rash. (wikipedia.org)
Although technically not Toxicodendron species, mangoes and Japanese lacquer trees also contain urushiol and can incite a similar clinical picture. (medscape.com)
Toxicodendron species contain oleoresins known collectively as urushiol. (medscape.com)
Although a common misconception, fluid from the vesicles of a poison ivy rash does not contain urushiol and is not an irritant source for new lesions. (medscape.com)
Poison ivy dermatitis is a type IV hypersensitivity, cell-mediated, allergic reaction to the urushiol compound. (contemporaryclinic.com)
Interestingly, those with a history of poison ivy dermatitis may be at risk for cross-reaction with other urushiol-containing plants such as mango trees. (contemporaryclinic.com)
Poison ivy produces urushiol, a faint yellow oil secreted by poison ivy leaves, poison ivy stems, and poison ivy roots. (ovhvac.org)
Because urushiol is an oil, it may transfer from clothing and tools to the skin long after the items had contact with the Poison Ivy. (geocaching.com)
The Secwépemc would drink large quantities of Labrador tea and would also boil the tops of the Arrowleaf Balsamroot to make a solution used to wash and bathe in to help soothe urushiol burns caused by contact with Poison Ivy. (geocaching.com)

Toxicodendron species are abundant throughout the United States except in desert areas, elevations above 4000 ft, Alaska, and Hawaii. (medscape.com)
Plant poisons can cause only a slight discomfort in some cases, to a violent sickness or even death in others, depending on the species ingested and the susceptibility of an individual. (weedscanada.ca)
Another species, poison oak, native chiefly to the south eastern U.S., has trifoliate leaves with each leaflet having 3-7 lobes. (pollenlibrary.com)
In Europe, dermatitis due to Primula species occurs predominantly in women. (medscape.com)

This publication contains information on the common cultivated, native, and naturalized plants of the northern United States and Canada that are reported to have caused poisonings, a dermatitis or hay fever in humans. (weedscanada.ca)
People also differ greatly in their susceptibility to the different plants that cause a dermatitis and to the various plant pollens that cause hay fever, An attempt is made to provide some general information on the extent and severity of poisonings, dermatitis or hay fever caused by the ingestion or any other contact with various plant parts. (weedscanada.ca)

However, the most prevalent form of plant dermatitis worldwide occurs from exposure to the numerous members of the family Compositae and varied sesquiterpene lactone allergens from these plants. (medscape.com)
In patch-testing conditions, more than 70% of the population in the United States reacts to poison ivy and poison oak allergens, whereas roughly 50% of the population has such reactions in nature. (medscape.com)

According to the 2018 Annual Report of the American Association of Poison Control Centers' National Poison Data System, skin irritation from Toxicodendron was the 6th most common plant exposure, accounting for 1015 cases. (medscape.com)
More detailed information should be sought from local poison control centers, hospitals, educational institutions, and federal, state and provincial agencies. (weedscanada.ca)

Exposure to unroasted cashew nut shells can cause a dermatitis often confused with toxicodendron dermatitis in susceptible individuals. (medscape.com)

The appearance of a spreading rash indicates that some areas received more of the poison and reacted sooner than other areas or that contamination is still occurring from contact with objects to which the original poison was spread. (wikipedia.org)
5 Unlike some types of dermatitis, the rash of poison ivy is not selective to any particular skin type, so individuals of any ethnicity can be affected. (contemporaryclinic.com)
The effects of contact with Poison Ivy can take up to 24 hours before appearing on the skin as an itchy and irritating rash that is sometimes accompanied by blisters that is painful in almost all people who come into contact with it. (geocaching.com)

They are variable in appearance and habit, and despite its common name, it is not a "true" ivy (Hedera), but rather a member of the cashew and pistachio family (Anacardiaceae). (wikipedia.org)
Poison Ivy is not a "true" Ivy ( Hedera ) but is actually a member of the pistachio and cashew family (Anacardiaceae). (geocaching.com)
English Ivy (Hedera helix) Grown as a climbing vine and ground cover, English ivy is a lovely façade green with its lobed deep green foliage. (sachecucine.it)

In addition to pruritic erythema and papules/vesicles, poison ivy can yield edema in the exposed area. (contemporaryclinic.com)

Toxicodendron is a term that means "poisonous tree. (contemporaryclinic.com)

Some toxins are so potent that a single mouthful can cause severe poisoning, whereas others become toxic only after large quantities are consumed or when material is eaten over a long period of time. (weedscanada.ca)
It is, therefore, your own responsibility to learn which plants are toxic and may poison our animals. (crazycrittersinc.com)

3 Nevertheless, this adage is most applicable to poison ivy, as it has 3 leaflets with flowering branches. (contemporaryclinic.com)
Leaves of three are an authentic characteristic of Poison Ivy as the leaves always appear in bunches of three leaflets. (geocaching.com)
Poison Ivy can be identified by its four main characteristics: shiny leaflets that grow in clusters of three, leaflets alternate on the stem, no thorns present, and the leaflet groups of three each grow on their own stems connecting to the main branch with the middle leaf stem being longer than the others in the group. (geocaching.com)

These lesions may be treated with calamine lotion, Burow's solution compresses, dedicated commercial poison ivy itch creams, or baths to relieve discomfort, though recent studies have shown some traditional medicines to be ineffective. (wikipedia.org)

The winter shape of poison ivy on fence posts resembles medusa heads. (medscape.com)

The risk of acquiring plant-related dermatitis is influenced by host susceptibility and exposure. (medscape.com)

The milky sap of poison ivy darkens after exposure to the air. (ovhvac.org)

1 Toxicodendron dermatitis can result from a variety of plants, including western and eastern poison ivy ( Toxicodendron rydbergii and Toxicodendron toxicarium , respectively). (contemporaryclinic.com)
Eastern poison ivy can be found as a ground vine and as a climbing vine. (ovhvac.org)
Poison ivy, native to the eastern U.S., is found commonly along roads, growing on trees and walls. (pollenlibrary.com)

4 There is a natural tendency for outdoor workers to have plant dermatitis. (contemporaryclinic.com)
She saved a poison ivy plant from destruction in Robinson Park and has been speaking to it as if she was carrying on a conversation with Ivy. (ovhvac.org)
Chronically immersed hands (eg, florists' hands) may be particularly predisposed to plant-related dermatitis. (medscape.com)

Forearm approximately 10 days after exposure to poison ivy in a garden. (medscape.com)

Poison ivies can grow as small plants, shrubs, or climbing vines. (wikipedia.org)

It develops a good autumn color like other sumacs of bright yellow to red to red-purple.Its leaves may appear like a poison ivy at first glance but the biggest giveaway is the central leaflet doesn't have a stem that a poison ivy is characterized with. (sachecucine.it)

If poison ivy is eaten, the mucus lining of the mouth and digestive tract can be damaged. (wikipedia.org)

3 Unlike poison ivy, which is usually found growing as a vine or shrub east of the Rocky Mountains along trails, ponds, and lakes, poison oak usually grows as a … Corticosteroids, either applied to the skin or taken by mouth, may be appropriate in extreme cases. (ovhvac.org)
Western Poison Ivy grows as a shrub reaching from 3 feet up to 10 feet tall. (geocaching.com)

Toxicodendron rydbergii: found throughout Canada and much of the United States except the southeast. (wikipedia.org)

Moreover, once the oils are washed off the skin, poison ivy cannot spread to others, which is another common misnomer among patients. (contemporaryclinic.com)
11 Poison ivy dermatitis sequelae can include postinflammatory hyperpigmentation, which is more common in darker-skinned patients and typically resolves with time. (contemporaryclinic.com)
Is a common rhyme used in identifying Poison Ivy. (geocaching.com)

After flowering, Poison Ivy produces pea sized fruits that are white, yellow, or even brown in colour maturing August through November and they each contain a tiny seed. (geocaching.com)

One should strongly suspect that any climbing vine with aerial rootlets connected to a tree or log is poison ivy or poison oak. (medscape.com)

Large patches of purple-flowered Canada thistle ( Cirsium arvense ) grow at the edge of the marsh, interspersed with tall stalks of poison-hemlock ( Conium maculatum ) covered with small white flowers. (boisefrontnature.com)

The western Poison Ivy is native to much of Canada from the far east to the west in British Columbia growing as far down as the south United States. (geocaching.com)

Over-the-counter products to ease itching-or simply oatmeal baths and baking soda-are now recommended by dermatologists for the treatment of poison ivy. (wikipedia.org)
Without treatment, poison ivy dermatitis is typically self-limiting within 1 to 3 weeks. (contemporaryclinic.com)

With increasing global travel and transport of plants, true toxicodendron dermatitis is being increasingly reported in Europe, although it is still case reportable. (medscape.com)

It is a relative of poison ivy but doesn't share its dangerous characteristics. (sachecucine.it)

It inhabits mostly uplands areas, while poison ivy has no odor and can inhabit various habitats. (sachecucine.it)
Poison ivy and poison oak are weeds that grow in a variety of habitats, but they prefer shaded areas with rich, wet soil. (medscape.com)

Organisms2

Diseases7

Chemicals and Drugs2

Analytical, Diagnostic and Therapeutic Techniques and Equipment1

Contact dermatitis17

Genus8

Sumac13

Radicans9

Diversilobum2

North America1

Urushiol9

Species4

Poisonings2

Allergens2

Control Centers2

Susceptible1

Rash3

Hedera3

Vesicles1

Poisonous1

Toxic2

Leaflets3

Lesions1

Resembles1

Susceptibility1

Milky sap1

Eastern3

Plant3

Exposure1

Climbing vines1

Leaflet1

Eaten1

Shrub2

Southeast1

Common3

Produces1

Vine1

Tall1

Western1

Treatment2

True1

Characteristics1

Areas2