The mere taste of the fruit; a passing brush against the leaves or branches or trunk; standing beneath the tree during a mild rain; breathing the air around the tree; ALL can poison you.
“Warning: all parts of manchineel are extremely poisonous. The content in this document is strictly informational. Interaction with and ingestion of any part of this tree may be lethal,” write Michael G. Andreu and Melissa H. Friedman of the University of Florida in a brief guide to the tree. This is not an exaggeration. The fruits, though described as sweet and tasty, are extraordinarily toxic. Fatalities are not known in modern literature, though it’s certainly possible that people have died from eating the fruit of the manchineel. “Shipwrecked sailors have been reported to have eaten manchi eel fruits and, rather than dying a violent death, they had inflammations and blistering around the mouth. Other people have been diagnosed with severe stomach and intestinal issues,” says Roger Hammer, a naturalist and botanist who has written many books about the flora of Florida.
(Photo Credit: Yinan Chen – Wikimedia Commons)