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Many large opossums (Didelphini) are immune to the venom of rattlesnakes and pit vipers and regularly prey upon these snakes. [46] This adaptation seems to be unique to the Didelphini, as their closest relative, the brown four-eyed opossum , is not immune to snake venom. [ 47 ]
The immunity was initially thought to come from an immune response leading to the production of antibodies, but in fact it comes from toxin-neutralizing proteins found in opossum serum. [ 7 ] [ 8 ] These proteins are produced by the opossum prior to any encounter with a venomous snake, thus this immunity is not learned but inherited.
Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Opossums don't look inviting but their benefits far outweigh their appearance, especially if there are dead trees in your woodlands. Opossums are nature's providers: Gentle marsupials don't get ...
Poison oak is a leafy shrub that grows in shady areas of your yard where it can reach six feet in height. The leaves and stems of the western poison oak plant ( Toxicodendron ) can release an oil ...
Urushiol / ʊ ˈ r uː ʃ i. ɒ l / is an oily mixture of organic compounds with allergenic properties found in plants of the family Anacardiaceae, especially Toxicodendron spp. (e.g., poison oak, Chinese lacquer tree, poison ivy, poison sumac), Comocladia spp. (maidenplums), Metopium spp.
Poison Ivy, a well-known toxic plant common in Texas especially during the spring and summer, causes an itchy painful rash. This is caused by its sap that has a clear liquid called urushiol.
Virginia opossums can vary considerably in size, with larger specimens found to the north of the opossum's range and smaller specimens in the tropics. They measure 33–55 cm (13–22 in) long from their snout to the base of the tail, with the tail adding another 25–54 cm (9.8–21.3 in).