. micro-organismes pathogènes, y compris les bactéries et le Protozoa; un manuel pratique pour les étudiants, les médecins et les agents de santé. Il les considérait peut-être comme des trypano-somes, mais ne les nombait pas. Plus tard dans la même année, Donovan a décrit des corps similaires dans les cas de ce qu'il a appelé cachexie malarique. Les 55-4 corps PA THOGEXIC MICRO-ORGA XISMS. Ont d'abord été appelés corps Leishman-Donovan, puis Laveranand Mesnil qui a examiné les préparations de Donovans et a considéré les organismes semblables à ceux qui causent la fièvre du Texas chez le bétail, appelé themPiroplasma donovani.

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. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. y him dum-dum fever, occurring in India. He considered them as possibly trypano-somes, but did not name them. Later in the same year Donovan de-scribed similar bodies in cases of what he called malarial cachexia. The 55-4 PA THOGEXIC MICRO-ORGA XISMS. bodies were first called the Leishman-Donovan bodies, then Laveranand Mesnil who examined Donovans preparations and consideredthe organisms similar to those causing Texas fever in cattle, called themPiroplasma Donovani. Ross, however, thought they constituted a dis-tinct fifenus and named {hemLeishmania donovani, bv which name thevare still known. But there is little doubt, through the work of Rogersand of Patton, of their belonging to the genus Herpetomonas. Theyhave since been found in different parts of India, in China, Tunis, Algiers, Arabia, and Egypt, and Wright in this country has reportedin a case of Delhi boil from an Armenian immigrant, bodies which, according to his excellent photographs and description, must be identi- FiG. 172. Protozoa in a case of tropical ulcer. Smear preparation from the lesion stained with ^^rightsRomanowsky blood-staining fluid. The ring-Uke bodies with white central portions and contain-ing a larger and a smaller dark mass are the microorganisms. The dark naasses in the bodies arestained a lilac color, while the peripheral portions of the bodies in typical instances are stained apale robins-egg blue. The very large dark masses are nuclei of cells of the lesion. X 1500 approxi-mately. (After Wright.) I cal with, or very closely related to, Leishmans bodies. On accountof the different pathologic conditions in which they are found, theyare considered by some a different species, Herpetomonas tropica, Wright. The form found in infantile splenomegaly may be consid-ered another species, with the name Herpefomcnas infantile, untW furtherstudy. Darling has recently de

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