… , Walker DH, unpublished data). Severity of disease, including lethality, is dose-, Orientia
strain-, and mouse strain-dependent. Intradermal inoculation of C57BL/6 inbred mice does not …

Scrub typhus is a serious public health problem in the Asia-Pacific area. It threatens one billion
people globally, and causes illness in one million people each year. Caused by Orientia …

… in Dumler’s laboratory as Chen and Walker refocused their efforts on funded E. chaffeensis
… Chen SM, Dumler JS, Feng HM, Walker DH. Identification of the antigenic constituents of …

Background Heightened surveillance of acute febrile illness in China since 2009 has led to
the identification of a severe fever with thrombocytopenia syndrome (SFTS) with an unknown …

Six patients from northern Minnesota and Wisconsin with a febrile illness accompanied by
granulocytic cytoplasmic morulae suggestive of ehrlichial infection were identified. Two …

Owing to the potential role of the tick Amblyomma cooperi in the enzootic cycle of Rickettsia
rickettsii, the etiologic agent of Brazilian spotted fever (BSF), this study evaluated infection by …

… Dumler JS, Walker DH. Isolation and partial characterization of an Ehrlichia-isolate from
a … Dumler JS, Dawson JE, Walker DH. Human ehrlichiosis: hematopathology and …

… Walker DH, Raoult D. Rickettsia rickettsii and other spotted fever group rickettsiae (Rocky
Mountain spotted fever and other spotted fevers). In: Mandell GL, Bennett JE, Dolin R, eds. …

A large epidemic of anthrax that occurred in Sverdlovsk (now Ekaterinburg), Russia, in 1979
resulted in the deaths of many persons. A series of 42 necropsies, representing a majority of …

This study evaluates the rickettsial presence in Amblyomma ticks from eight areas of the
Amazon forest in Rondônia, Brazil. The following tick species (number in parentheses) were …