Many plants are highly poisonous when ingested, this is common knowledge. It is remarkable, however, that simply touching certain plants can also be a serious health hazard. Stinging Nettles are rather harmless in this respect, but there are much more dangerous contact-poisonous plants in many parts of the world, especially in the tropics. They can cause severe pain, rashes, blisters or leave scars. Some trees are reported to be so powerful that even raindrops falling from them can irritate the skin. Other plant species can cause blindness through the smoke of burning wood or from rubbing the eyes after touching the leaves. This document gives a concise overview of those contact-poisonous plants that may be of interest for travellers. The first part briefly introduces the active principles, effects, treatment and geographical distribution. The second part lists about 35 important plant species and describes them in detail. Information about this interesting subject is usually scattered across many different sources, like scientific works about dermatology or botany, regional field guides, travel literature, or magazines. The rare scientific literature on the subject usually lists thousands of plant species and describes in medical detail the effects on workers who were exposed to the same species for years. Only a small number of those plants is dangerous after an occasional contact, however, which means that information relevant for travellers is hidden amid lots of other data. Available information has been selected and densified to be presented here. Latest update: 2 October 2006.

Many plants are highly poisonous when ingested, this is common knowledge. It is remarkable, however, that simply certain plants can also be a serious health hazard. Stinging Nettles are rather harmless in this respect, but there are much more dangerous contact-poisonous plants in many parts of the world, especially in the tropics. They can cause severe pain, rashes, blisters or leave scars. Some trees are reported to be so powerful that even raindrops falling from them can irritate the skin. Other plant species can cause blindness through the smoke of burning wood or from rubbing the eyes after touching the leaves.

This document gives a concise overview of those contact-poisonous plants that may be of interest for travellers. The first part briefly introduces the active principles, effects, treatment and geographical distribution. The second part lists about 35 important plant species and describes them in detail.

Information about this interesting subject is usually scattered across many different sources, like scientific works about dermatology or botany, regional field guides, travel literature, or magazines. The rare scientific literature on the subject usually lists thousands of plant species and describes in medical detail the effects on workers who were exposed to the same species for years. Only a small number of those plants is dangerous after an occasional contact, however, which means that information relevant for travellers is hidden amid lots of other data. Available information has been selected and densified to be presented here.

Latest update: 2 October 2006.

Katrin Rodhe tenía una vida tranquila y cómoda en su Alemania natal hasta que, tras un primer viaje a África en 1989, decidió dar un giro radical a su existencia. El impacto que le causó la situación de los niños huérfanos que vagaban por las calles de Ouagadougou la conveció de que debía dedicar el resto de su vida a luchar por ellos. El relato de la vida de los niños de la calle de la capital de Burkina Faso es desolador: drogas, marginación, miseria, delincuencia..., una espiral de la que difícilmente se puede salir sin ayuda.Después de vender todas sus pertenencias en Alemania, Katrin decide utilizar su dinero para comprar una casa donde alojar a los niños que rescata de la calle y que deben comprometerse a dejar las drogas y aprender a leer y escribir. Pero el número de niños crece y, a pesar de las ayudas que recibe de Alemania, la situación es cada vez más complicada. Katrin decide entonces construir un orfanato. A pesar de los muchos sinsabores, de las decepciones, de los conflictos con la Administración, Mama Tenga no se rinde y sigue adelante, animad por las numerosas muestras de apoyo y solidadaridad...