Report of first expedition to South America, 1913Members of the expedition: Richard PStrong [and others] . is certainly highly undesirable. Upon investi-gation, however, we have found that the use of Bartonia asa generic name has been applied by Cossmann ^ to an eocenemollusk, Bartonia canaliculatum, hence we have given thegeneric name Bartonella, retaining the specific one, bacil-liformis (Bartonella bacilliformis). The genus was also defined provisionally from the formsstudied in the red blood-corpuscles as follows: organismsrounded or rod-shaped, sometimes occurring in chains ofseveral divi
Report of first expedition to South America, 1913Members of the expedition: Richard PStrong [and others] . is certainly highly undesirable. Upon investi-gation, however, we have found that the use of Bartonia asa generic name has been applied by Cossmann ^ to an eocenemollusk, Bartonia canaliculatum, hence we have given thegeneric name Bartonella, retaining the specific one, bacil-liformis (Bartonella bacilliformis). The genus was also defined provisionally from the formsstudied in the red blood-corpuscles as follows: organismsrounded or rod-shaped, sometimes occurring in chains ofseveral dividing forms; reproduction by binary transversedivision; cytoplasm and chromatinic substance often differ-entiated with difficulty; endowed with independent motility;living as parasites in the red blood-corpuscles. Development within the Endothelial Cells.— Subsequentlyupon examining sections of the organs from severe fatal casesof Oroya fever, in addition to the pathological changes ob- 1 Brumpt: loc. cit. ^ Prowazek: loc. cit. ^ Cossmann: Essais de Paleoconchologie Comparee, 4° Livr., Paris, QO I S
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