Results 171 to 180 of about 3,995 (206)

Identification of the Antigenic Constituents of Ehrlichia chaffeensis

The American Journal of Tropical Medicine and Hygiene, 1994
Ehrlichia chaffeensis, the novel etiologic agent of human ehrlichiosis in the United States, was first isolated in 1990 and reported in 1991. To analyze the antigenic components of E. chaffeensis, we cultivated these obligate intracellular bacteria in DH82 cells, purified the ehrlichiae by renografin density gradient centrifugation, and examined the ...
S M, Chen, J S, Dumler, H M, Feng, D H, Walker   +3 more
openaire   +2 more sources

Ehrlichia chaffeensis in Missouri ticks.

The American journal of tropical medicine and hygiene, 1998
A nested polymerase chain reaction specific for Ehrlichia chaffeensis was used to attempt to amplify DNA from extracts of 100 individual ticks collected from 13 counties in central Missouri. Seventeen of 59 Amblyomma americanum and six of 41 Dermacentor variabilis ticks exhibited the characteristic 389-basepair product.
W E, Roland, E D, Everett, T L, Cyr, S Z, Hasan, C B, Dommaraju, G A, McDonald   +5 more
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Ehrlichia chaffeensis and Rochalimaea antibodies in Kawasaki disease

Journal of Clinical Microbiology, 1993
Sera from 38 patients with Kawasaki disease were tested for immunofluorescent antibodies to Ehrlichia chaffeensis, Rochalimaea henselae, and R. quintana Oklahoma. Only 2.5% of the patients tested positive for E. chaffeensis, and 5% were positive for R. henselae and R. quintana Oklahoma. Our data suggest that Ehrlichia and Rochalimaea spp. do not play a
M H, Rathore, L L, Barton, J E, Dawson, R L, Regnery, E M, Ayoub   +4 more
openaire   +2 more sources

Fourth Nerve Palsy Caused by Ehrlichia chaffeensis

Journal of Neuro-Ophthalmology, 1997
Two human ehrlichioses occur in the United States: human monocytic ehrlichiosis (HME), which is caused by Ehrlichia chaffeensis that infects mononuclear phagocytes in blood and tissue, and human granulocytic ehrlichiosis (HGE), an infection of granulocytes that is caused by a similar but phylogenetically distinct organism. The clinical features of both
N, Carter, N R, Miller
openaire   +2 more sources

Infection Rates ofAmblyomma americanumandDermacentor variabilisbyEhrlichia chaffeensisandEhrlichia ewingiiin Southwest Missouri

Vector-Borne and Zoonotic Diseases, 2002
Both Ehrlichia chaffeensis and Ehrlichia ewingii are causative agents of human ehrlichiosis. Both pathogens are transmitted to humans through the bite of an infected lone star tick (Amblyomma americanum).
Steiert, John G., Gilfoy, Felicia
exaly   +2 more sources

Persistent infection of C3H/HeJ mice by Ehrlichia chaffeensis

Veterinary Microbiology, 1996
Description of the pathobiology of the recently described zoonotic agent of human ehrlichiosis (Ehrlichia chaffeensis) would be greatly facilitated by the availability of a convenient experimental animal model of infection. We determined whether C3H/HeJ mice could sustain persistent infection by this predominantly monocyte-inhabiting rickettsia.
S R, Telford, J E, Dawson
openaire   +2 more sources

Anaplasma phagocytophilum and Ehrlichia chaffeensis: subversive manipulators of host cells

Nature Reviews Microbiology, 2010
Anaplasma spp. and Ehrlichia spp. cause several emerging human infectious diseases. Anaplasma phagocytophilum and Ehrlichia chaffeensis are transmitted between mammals by blood-sucking ticks and replicate inside mammalian white blood cells and tick salivary-gland and midgut cells.
Yasuko Rikihisa, Rikihisa Yasuko
exaly   +3 more sources

Human ehrlichiosis: Hematopathology and immunohistologic detection of Ehrlichia chaffeensis

Human Pathology, 1993
Human ehrlichiosis is a recently described zoonosis caused by a rickettsia that infects leukocytes. Most patients have fever, headache, chills, and myalgias and develop leukopenia, thrombocytopenia, anemia, and elevations in serum hepatic aminotransferases. The cause of the peripheral leukopenia and thrombocytopenia is not known.
J S, Dumler, J E, Dawson, D H, Walker
openaire   +2 more sources

Prevalence of Ehrlichia chaffeensis and Ehrlichia ewingii in Ticks from Tennessee

Vector-Borne and Zoonotic Diseases, 2010
Human ehrlichiosis is the second most common tick-borne disease reported in Tennessee after Rocky Mountain spotted fever. Two closely related ehrlichiae, Ehrlichia chaffeensis and Ehrlichia ewingii, are both causative agents of human disease and are transmitted by Amblyomma americanum, the lone star tick.
Sara B, Cohen, Michael J, Yabsley, James D, Freye, Brett G, Dunlap, Meghan E, Rowland, Junjun, Huang, John R, Dunn, Timothy F, Jones, Abelardo C, Moncayo   +8 more
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SUSCEPTIBILITY OF RED AND GRAY FOXES TO INFECTION BY EHRLICHIA CHAFFEENSIS

Journal of Wildlife Diseases, 1999
Red foxes (Vulpes vulpes) and gray foxes (Urocyon cinereoargenteus) were evaluated for their susceptibility to experimental infection with Ehrlichia chaffeensis, the causative agent of human monocytotropic ehrlichiosis. Two red foxes and three gray foxes were inoculated intravenously with E.
W R, Davidson, J M, Lockhart, D E, Stallknecht, E W, Howerth   +3 more
openaire   +2 more sources