Yes Ginny, you're right. I have had the Jatropha for many years & both dh & I have pruned & gotten sap on us & our clothes & suffered no ill except that the sap goes on your clothes clear & when it dries you end up with rust like stains which I guarantee you can NOT get out! All parts of the jatropha are poisonous.
On the other hand; there's no telling who is sensitive to what particular plant. When I was about 5, I "helped" my dad haul the prunings of our Castor Bean (Ricinus communis) to the curb. After a couple years of playing around this plant & being sternly warned that the seeds were poisonous & to NEVER put them in my mouth & if I touched the seeds to wash my hands IMMEDIATELY; I had had no problems with the plant. However, when I helped dad, I got some of the sap on me. The next day I broke out in giant hives the size of guinea eggs under the skin. Eyes were swollen shut & I felt horrible. Had to get a BIG needle in my hip from the doc for that one. My father was fine.