Europe's Discovery of the Ethiopian Taenicide-Kosso
Medical History, 1979, 23: 297-313. EUROPE'S DISCOVERY OF THE ETHIOPIAN TAENICIDE-KOSSO by RICHARD PANKHURST* EARLY REPORTS EUROPE'S DISCOVERY of the Ethiopian taenicide kosso, variously known as Banksia Abyssinica, Brayera anthelmintica, and Hagenia Abyssinica, dates back to the early seventeenth century when the Jesuits first penetrated the hitherto little-explored kingdom of Prester John. The drug, and the tree from the flowers and seeds of which it was prepared, caught the attention of at least three of the missionaries, Pero Paes, a Spaniard,1 and two Portuguese, Manoel Barradas2 and Manoel de Almeida.3 The latter records that the "Co9o" tree was found in "nearly all the high and cold parts" ofthe country, and bore "fruit like ears ofcorn or like the chestnut flower that we call 'lamps'." Explaining that it was "as bitter as the whin", he somewhat naively con- cluded that "because it is so bitter when drunk it is an excellent medicine with which to kill certain worms in the stomach".4 Similar statements were made by another Portuguese Jesuit, Nicolo Godinho.5 These reports were read with interest by the seventeenth-century German scholar Job Ludolf, who has aptly been termed the founder of Ethiopian studies in Europe. Citing Godinho as his source, he notes that there grew in Ethiopia a tree "most excellent against Worms in the Belly", and that this was "a Distemper frequent among the Abessines, by reason of their feeding upon Raw Flesh. For the remedy whereof the Habessines Purge themselves once a Month with the Fruit of the Tree, which causes them to Void all their Worms".6 Such mention of the remarkable properties of kosso had, however, little or no impact on European medical thinking, for though taenia was then prevalent in many parts of the continent, and most difficult to cure, the expulsion of the Jesuits from Ethiopia in 1632-33 had rendered the country too isolated to allow access to persons in search of drugs.
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