| serotypes of tick-borne spotted fever group rickettsiae from western california. | a rickettsial survey of ixodid ticks known to bite man was conducted in 1979 in four coastal counties of california to obtain isolates from tick species that might be involved in the transmission of spotted fever-like illnesses, and to examine serologic characteristics of the rickettsiae relative to defined members of the spotted fever group (sfg). one hundred and seventy (19.4%) of 877 ticks comprising three species were shown by hemolymph test to harbor rickettsia-like organisms. a total of 85 ... | 1981 | 6789691 |
| ecology of tick-borne agents in california. i. spotted fever group rickettsiae. | | 1981 | 7212168 |
| detection of rickettsia rickettsii and bartonella henselae in rhipicephalus sanguineus ticks from california. | sixty-two questing adult rhipicephalus sanguineus (latreille) ticks were collected by direct removal from blades of turfgrass and adjacent concrete walkways at a suburban home in riverside county, ca, and tested for the presence of rickettsia, bartonella, and ehrlichia dna. polymerase chain reaction (pcr) was used to amplify fragments of the 17-kda antigen gene and the rompa gene of the spotted fever group rickettsiae. one male tick contained r. rickettsii dna; its genotype differed from r. rick ... | 2007 | 17294935 |
| detection and identification of spotted fever group rickettsiae in dermacentor species from southern california. | dermacentor occidentalis marx and dermacentor variabilis (say) commonly bite humans in california. these dermacentor species may play a role in transmitting spotted fever group (sfg) rickettsiae to humans in many parts of the state where dermacentor andersoni stiles, a known vector for the etiologic agent of rocky mountain spotted fever, rickettsia rickettsii, is absent. however, the specific rickettsial agents present in these ticks and their current prevalence are poorly understood. in total, ... | 2008 | 18533446 |
| evidence of multiple zoonotic agents in a wild rodent community in the eastern sierra nevada. | this study aimed to describe the occurrence of yersinia pestis, rickettsia rickettsii, anaplasma phagocytophilum, and ectoparasites in a wild rodent community in the eastern sierra nevada. from may to september 2006, rodents were live-trapped, examined for ectoparasites, and blood was collected. all rodents were serologically tested for antibodies to y. pestis, r. rickettsii, and a. phagocytophilum; in addition, blood samples and ectoparasites were tested by pcr to detect the presence of these z ... | 2008 | 18689664 |
| rickettsia 364d: a newly recognized cause of eschar-associated illness in california. | four spotted fever group rickettsiae (sfgr) are known to infect humans in the united states. a member of the sfgr designated 364d and detected in dermacentor occidentalis ticks has not previously been identified as a human pathogen. | 2010 | 20073993 |
| a focus of dogs and rickettsia massiliae-infected rhipicephalus sanguineus in california. | a recurrent focus of rhipicephalus sanguineus infestation was investigated in a suburban area of southern california after reports of suspected rocky mountain spotted fever in two dogs on the same property. abundant quantities of rh. sanguineus were collected on the property and repeatedly from each dog, and rickettsia massiliae dna was detected by polymerase chain reaction (pcr). whole blood and serum samples from four dogs were tested by using pcr and microimmunofluorescent assay for antibodie ... | 2011 | 21292893 |
| arthropod vectors and vector-borne bacterial pathogens in yosemite national park. | ticks, fleas, and vector-borne pathogens were surveyed in diverse small mammals in yosemite national park, california, from 2005 to 2007. a total of 450 unique captures of small mammals was collected during a 3-yr period and yielded 16 species of fleas and 10 species of ticks, including known vectors of anaplasma phagocytophilum and borrelia burgdorferi and plague. serology was performed for a. phagocytophilum, spotted fever group rickettsia spp., b. burgdorferi, and yersinia pestis. a. phagocyt ... | 2011 | 21337955 |
| molecular detection and identification of rickettsia species in ixodes pacificus in california. | we amplified 16s rrna, glta, and ompa genes from ixodes pacificus by polymerase chain reaction. sequencing, blast analysis, and phylogenetic constructions indicated that two rickettsia phylotypes are present in i. pacificus. while phylotype g021 has high homology to ixodes scapularis endosymbiotic rickettsia, phylotype g022 is a deeply branched novel spotted fever group rickettsia. | 2011 | 21413886 |
| tick infestation and spotted-fever group rickettsia in shelter dogs, california, 2009. | in response to an outbreak of rocky mountain spotted fever (rmsf) in baja california in early 2009, dogs at two shelters in neighbouring imperial county, california, were evaluated for ectoparasites. brown dog ticks (rhipicephalus sanguineus), a recognized vector for rmsf, were found on 35 (30%) of 116 dogs but all ticks tested negative for rickettsia rickettsii by pcr. | 2011 | 21824367 |