Results 141 to 150 of about 5,340 (173)
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A Toxic Substance Associated with the Rickettsias of the Spotted Fever Group
The Journal of Immunology, 1953Summary A toxic substance was demonstrated in yolk sac cultures of ten strains of the spotted fever rickettsia which were selected according to their virulence for guinea pigs, tick-host species, or etiologic relationship to the various diseases of the spotted fever group. These strains included the agents of Rocky Mountain spotted fever,
E J, BELL, E G, PICKENS
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SPOTTED FEVER GROUP RICKETTSIA RETINITIS IN A TRAVELER TO AFRICA
RETINAL Cases & Brief Reports, 2016To describe a case of rickettsial retinitis in a traveler returning from Africa.Case description.A 67-year-old woman returning from an excursion in the jungles of Africa presented with a 2-day history of floaters and decreased vision in the right eye. In the two preceding weeks, she had experienced fever, malaise, a black eschar on the right elbow, and
Renaud, Duval, Pauline T, Merrill
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Mediterranean Spotted Fever And Other Spotted Fever Group Rickettsiae
1998Abstract The spotted fever group of rickettsiae consists of 22 serotypes, or species, of Gram-negative, strictly intracellular bacteria which are associated with ticks and have common antigenic properties. Six strains isolated from patients are recognized as pathogens, while nine others have been isolated only from ticks and are ...
Lorenza Beati, Didier Raoult
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Seroprevalence of Spotted Fever Group Rickettsiae in Dogs in Germany
Vector-Borne and Zoonotic Diseases, 2015Tick-transmitted spotted fever group Rickettsiae (SFGR) are considered emerging disease pathogens in Europe. To assess the situation in Germany, a seroepidemiologic survey of dogs (n=605, which have never left Germany) was conducted to determine the prevalence of antibodies to SFGR. For this purpose, a commercially available enzyme-linked immunosorbent
Wächter, Miriam +9 more
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Serologic Typing of Rickettsiae of the Spotted Fever Group by Microimmunofluorescence
The Journal of Immunology, 1978Abstract The micro-immunofluorescence (micro-IF) method was used to type rickettsiae belonging to the spotted fever or typhus groups according to their surface antigens. Seventy-two strains of rickettsiae from diverse sources, with varying histories of laboratory manipulation and immunologic characterization by other methods, were cross ...
R N, Philip +5 more
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Prevalence of Spotted Fever Group Rickettsia in North-Eastern Poland
Infectious Diseases, 2019Purpose: The north-eastern Poland is an endemic region of tick-borne diseases. The aim of the study is to assess the prevalence of anti-Rickettsia antibodies in the inhabitants of the north-eastern Poland and to assess the risk of acute infection (rickettsiosis) after a tick bite.
Karol, Borawski +6 more
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New records of spotted fever group rickettsiae in Baltic region
Microbes and Infection, 2015Tick-borne rickettsiae are considered to be emerging, but there is still a lack of data on the occurrence and prevalence of the spotted fever group rickettsiae across Europe, especially in the Baltic countries. The aim of the present study was to investigate the presence of Rickettsia spp. in Dermacentor reticulatus and Ixodes ricinus ticks, as well as
Jana, Radzijevskaja +6 more
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Antibodies to spotted fever-group rickettsiae in dogs in North Carolina
American Journal of Veterinary Research, 1987SUMMARY A seroepidemiologic survey was conducted to determine the prevalence of antibodies reactive with 4 spotted fever-group (sfg) rickettsiae in sera of dogs from various geographic regions in North Carolina. Serum specimens were obtained from 600 dogs, and antibody titers were determined, using microimmunofluorescence. Data analysis (setting as the
E B, Breitschwerdt +6 more
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Growth of Typhus Group and Spotted Fever Group Rickettsiae in Insect Cells
Annals of the New York Academy of Sciences, 2005Abstract: To analyze the host dependency of rickettsial growth, NIAS‐AeAl‐2 insect cells (AeAl2) derived from mosquito were first used in this study. It was demonstrated that typhus group rickettsiae (TGR) grew well in AeAl2 cells, but spotted fever group rickettsiae (SFGR) failed.
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