| phylogenetic analysis of a novel molecular isolate of spotted fever group rickettsiae from northern peru: candidatus rickettsia andeanae. | phylogenetic analysis of five rickettsial genes (17-kda gene, glta, ompb, ompa, and sca4) from two molecular isolates of candidatus rickettsia andeanae from two ticks (amblyomma maculatum and ixodes boliviensis) collected from two domestic horses living in two separate locations in northern peru (coletas and naranjo) was conducted to more clearly characterize this recently reported novel spotted fever group (sfg) rickettsia. following nested polymerase chain reaction (pcr) amplification of the 1 ... | 2005 | 16481537 |
| isolation of rickettsia parkeri and identification of a novel spotted fever group rickettsia sp. from gulf coast ticks (amblyomma maculatum) in the united states. | until recently, amblyomma maculatum (the gulf coast tick) had garnered little attention compared to other species of human-biting ticks in the united states. a. maculatum is now recognized as the principal vector of rickettsia parkeri, a pathogenic spotted fever group rickettsia (sfgr) that causes an eschar-associated illness in humans that resembles rocky mountain spotted fever. a novel sfgr, distinct from other recognized rickettsia spp., has also been detected recently in a. maculatum specime ... | 2010 | 20208020 |
| Detection of Rickettsia parkeri and Candidatus Rickettsia andeanae in Amblyomma maculatum Gulf Coast Ticks Collected from Humans in the United States. | Abstract Rickettsia parkeri, a spotted fever group (SFG) rickettsia recently found to be pathogenic to humans, causes an eschar-associated febrile illness. The R. parkeri rickettsiosis, Tidewater spotted fever, has been misdiagnosed as Rocky Mountain spotted fever due to serologic cross reactivity and the lack of specific diagnostic methods. Candidatus Rickettsia andeanae, also a SFG rickettsia, is a recently described agent of unknown pathogenicity originally identified in ticks collected fro ... | 2011 | 22022815 |
| in vitro propagation of candidatus rickettsia andeanae isolated from amblyomma maculatum. | candidatus rickettsia andeanae was identified during an investigation of a febrile outbreak in northwestern peru (2002). dna sequencing from two ticks (amblyomma maculatum, ixodes boliviensis) collected during the investigation revealed a novel rickettsia agent with similarity to the spotted fever group rickettsiae. since then, candidatus r. andeanae has been detected in a. maculatum ticks collected in the southeastern and southcentral united states, argentina, and peru. to date, candidatus r. a ... | 2011 | 22098316 |
| high rates of rickettsia parkeri infection in gulf coast ticks (amblyomma maculatum) and identification of "candidatus rickettsia andeanae" from fairfax county, virginia. | the gulf coast tick, amblyomma maculatum, is a vector of rickettsia parkeri, a recently identified human pathogen that causes a disease with clinical symptoms that resemble a mild form of rocky mountain spotted fever. because the prevalence of r. parkeri infection in geographically distinct populations of a. maculatum is not fully understood, a. maculatum specimens collected as part of a tick and pathogen surveillance system in fairfax county, virginia, were screened to determine pathogen infect ... | 2011 | 21867421 |
| detection of human bacterial pathogens in ticks collected from louisiana black bears (ursus americanus luteolus). | there are 4 major human-biting tick species in the northeastern united states, which include: amblyomma americanum, amblyomma maculatum, dermacentor variabilis, and ixodes scapularis. the black bear is a large mammal that has been shown to be parasitized by all the aforementioned ticks. we investigated the bacterial infections in ticks collected from louisiana black bears (ursus americanus subspecies luteolus). eighty-six ticks were collected from 17 black bears in louisiana from june 2010 to ma ... | 2013 | 23415850 |
| high prevalence of "candidatus rickettsia andeanae" and apparent exclusion of rickettsia parkeri in adult amblyomma maculatum (acari: ixodidae) from kansas and oklahoma. | amblyomma maculatum (the gulf coast tick), an aggressive, human-biting, nearctic and neotropical tick, is the principal vector of rickettsia parkeri in the united states. this pathogenic spotted fever group rickettsia species has been identified in 8-52% of questing adult gulf coast ticks in the southeastern united states. to our knowledge, r. parkeri has not been reported previously from adult specimens of a. maculatum collected in kansas or oklahoma. a total of 216 adult a. maculatum ticks wer ... | 2015 | 25773931 |
| detection of rickettsia parkeri from within piura, peru, and the first reported presence of candidatus rickettsia andeanae in the tick rhipicephalus sanguineus. | domestic farm animals (n=145) were sampled for the presence of ectoparasites in northwestern peru during march, 2008. ninety domestic animals (62%) were positive for the presence of an ectoparasite(s) and produced a total collection of the following: 728 ticks [amblyomma maculatum, anocentor nitens, rhipicephalus (boophilus) microplus, rhipicephalus sanguineus, and otobius megnini], 12 lice (haematopinus suis), and 3 fleas (ctenocephalides felis). a rickettsia genus-specific qpcr assay was perfo ... | 2013 | 23488453 |
| rickettsia parkeri and candidatus rickettsia andeanae in gulf coast ticks, mississippi, usa. | | 0 | 23018026 |
| specifying pathogen associations of amblyomma maculatum (acari: ixodidae) in western tennessee. | amblyomma maculatum koch (acari: ixodidae) is established in western tennessee, a region with increased risk for rocky mountain spotted fever and ehrlichiosis. this tick transmits rickettsia parkeri to humans, likely contributing to cases of rickettsiosis in the region. the objective was to determine pathogen associations within questing and host-collected a. maculatum, and identify ecological factors associated with pathogen infection that may increase the effectiveness of surveillance methods. ... | 2016 | 26744464 |
| rickettsia parkeri and "candidatus rickettsia andeanae" in questing amblyomma maculatum (acari: ixodidae) from mississippi. | amblyomma maculatum koch (acari: ixodidae), the primary vector for rickettsia parkeri, may also be infected with a rickettsia of unknown pathogenicity, "candidatus rickettsia andeanae." infection rates with these rickettsiae vary geographically, and coinfected ticks have been reported. in this study, infection rates of r. parkeri and "ca r. andeanae" were evaluated, and rickettsial dna levels quantified, in 335 questing adult a. maculatum collected in 2013 (n = 95), 2014 (n = 139), and 2015 (n = ... | 2016 | 27773866 |
| ultrastructure of presumed "candidatus rickettsia andeanae" in amblyomma maculatum (acari: ixodidae). | amblyomma maculatum koch, 1844 (also known as the gulf coast tick) is found in parts of the americas, including the central and southern united states. its primary importance is as the vector of rickettsia parkeri, a spotted fever group rickettsia that causes an illness similar to, but milder than, rocky mountain spotted fever. a second spotted fever group rickettsia, "candidatus rickettsia andeanae," was detected in gulf coast ticks approximately 10 yr ago. however, the significance of this org ... | 2014 | 26309324 |
| isolation of "candidatus rickettsia andeanae" (rickettsiales: rickettsiaceae) in embryonic cells of naturally infected amblyomma maculatum (ixodida: ixodidae). | the gulf coast tick, amblyomma maculatum koch, has become increasingly important in public health for its role as a vector of the recently recognized human pathogen, rickettsia parkeri. more recently, these ticks were also found to harbor a novel spotted fever group rickettsia, "candidatus rickettsia andeanae." first identified in peru, and subsequently reported in ticks collected in the united states, chile, and argentina, "ca. r. andeanae" remains largely uncharacterized, in part because of th ... | 2013 | 24180118 |