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Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii.
Levin ML, Zemtsova GE, Killmaster LF, Snellgrove A, Schumacher LBM. Levin ML, et al. Ticks Tick Borne Dis. 2017 Jun;8(4):615-622. doi: 10.1016/j.ttbdis.2017.04.006. Epub 2017 Apr 12. Ticks Tick Borne Dis. 2017. PMID: 28433728 Free PMC article.
Conversely, ticks of the genus Amblyomma are recognized vectors of RMSF in Central and South America, but not in the US. A. americanum is one of the most aggressive human-biting ticks in the US, whose geographical range overlaps with that of reported RMSF cases. ... …
Conversely, ticks of the genus Amblyomma are recognized vectors of RMSF in Central and South America, but not in the US. A. americ
Effects of Rickettsia amblyommatis Infection on the Vector Competence of Amblyomma americanum Ticks for Rickettsia rickettsii.
Levin ML, Schumacher LBM, Snellgrove A. Levin ML, et al. Vector Borne Zoonotic Dis. 2018 Nov;18(11):579-587. doi: 10.1089/vbz.2018.2284. Epub 2018 Aug 10. Vector Borne Zoonotic Dis. 2018. PMID: 30096017 Free PMC article.
Although Dermacentor spp. ticks are considered the primary vectors of Rickettsia rickettsii in the United States, other North American tick species are also capable of transmitting the agent, including the lone star tick-Amblyomma americanum. ...Howeve …
Although Dermacentor spp. ticks are considered the primary vectors of Rickettsia rickettsii in the United States, other North …
Expanding Range of Amblyomma americanum and Simultaneous Changes in the Epidemiology of Spotted Fever Group Rickettsiosis in the United States.
Dahlgren FS, Paddock CD, Springer YP, Eisen RJ, Behravesh CB. Dahlgren FS, et al. Am J Trop Med Hyg. 2016 Jan;94(1):35-42. doi: 10.4269/ajtmh.15-0580. Epub 2015 Oct 26. Am J Trop Med Hyg. 2016. PMID: 26503270 Free PMC article.
The reasons for this are not well understood; however, we hypothesize that less pathogenic rickettsiae are causing more human infections, while the incidence of disease caused by more pathogenic rickettsiae, particularly Rickettsia rickettsii, is relatively stable. …
The reasons for this are not well understood; however, we hypothesize that less pathogenic rickettsiae are causing more human infections, wh …
Rickettsia rickettsii (Rickettsiales: Rickettsiaceae) in Amblyomma americanum (Acari: Ixodidae) from Kansas.
Berrada ZL, Goethert HK, Cunningham J, Telford SR 3rd. Berrada ZL, et al. J Med Entomol. 2011 Mar;48(2):461-7. doi: 10.1603/me10130. J Med Entomol. 2011. PMID: 21485390
We compared the entomological inoculation rates (EIRs) for Rickettsia spp. for representative sites in Missouri and Kansas, states that frequently report RMSF each year. ...Of 870 adult and nymphal lone star ticks, Amblyomma americanum (L.), 0.46% contained D …
We compared the entomological inoculation rates (EIRs) for Rickettsia spp. for representative sites in Missouri and Kansas, states th …
Absence of Rickettsia rickettsii and occurrence of other spotted fever group rickettsiae in ticks from Tennessee.
Moncayo AC, Cohen SB, Fritzen CM, Huang E, Yabsley MJ, Freye JD, Dunlap BG, Huang J, Mead DG, Jones TF, Dunn JR. Moncayo AC, et al. Am J Trop Med Hyg. 2010 Sep;83(3):653-7. doi: 10.4269/ajtmh.2010.09-0197. Am J Trop Med Hyg. 2010. PMID: 20810834 Free PMC article.
Additionally, we tested 231 Amblyomma americanum larvae. Ticks were collected from 49 counties from humans, wild animals, domestic canines, and flannel drags. ...Rickettsia rickettsii was not detected. This study suggests that some RMSF cases reported …
Additionally, we tested 231 Amblyomma americanum larvae. Ticks were collected from 49 counties from humans, wild animals, dome …
Rickettsia spp. Infecting Lone Star Ticks (Amblyomma americanum) (Acari: Ixodidae) in Monmouth County, New Jersey.
Egizi A, Gable S, Jordan RA. Egizi A, et al. J Med Entomol. 2020 May 4;57(3):974-978. doi: 10.1093/jme/tjz251. J Med Entomol. 2020. PMID: 31912880
Out of the 1,858 tested, 465 (25.0%) were infected with Rickettsia amblyommatis Karpathy, a species of undetermined pathogenicity found frequently in A. americanum, while 1/1,858 (0.05%) contained Rickettsia rickettsii Brumpt, the agent of Rocky Mounta …
Out of the 1,858 tested, 465 (25.0%) were infected with Rickettsia amblyommatis Karpathy, a species of undetermined pathogenicity fou …
Rickettsia rickettsii Whole-Cell Antigens Offer Protection against Rocky Mountain Spotted Fever in the Canine Host.
Alhassan A, Liu H, McGill J, Cerezo A, Jakkula LUMR, Nair ADS, Winkley E, Olson S, Marlow D, Sahni A, Narra HP, Sahni S, Henningson J, Ganta RR. Alhassan A, et al. Infect Immun. 2019 Jan 24;87(2):e00628-18. doi: 10.1128/IAI.00628-18. Print 2019 Feb. Infect Immun. 2019. PMID: 30396898 Free PMC article.
The causative agent of this disease, Rickettsia rickettsii, is transmitted by several species of ticks, including Dermacentor andersoni, Rhipicephalus sanguineus, and Amblyomma americanum RMSF clinical signs generally include fever, headache, nausea, v …
The causative agent of this disease, Rickettsia rickettsii, is transmitted by several species of ticks, including Dermacentor …
Phylogenetic placement of rickettsiae from the ticks Amblyomma americanum and Ixodes scapularis.
Weller SJ, Baldridge GD, Munderloh UG, Noda H, Simser J, Kurtti TJ. Weller SJ, et al. J Clin Microbiol. 1998 May;36(5):1305-17. doi: 10.1128/JCM.36.5.1305-1317.1998. J Clin Microbiol. 1998. PMID: 9574696 Free PMC article.
A rickettsial isolate (isolate MOAa) belonging to the spotted fever group (SFG) was obtained from the lone star tick Amblyomma americanum. ...To place MOAa and WB-8-2 and two other nonpathogenic isolates (Rickettsia rickettsii Hip2 and Rickettsia
A rickettsial isolate (isolate MOAa) belonging to the spotted fever group (SFG) was obtained from the lone star tick Amblyomma ame
Antibody Titers Reactive With Rickettsia rickettsii in Blood Donors and Implications for Surveillance of Spotted Fever Rickettsiosis in the United States.
Straily A, Stuck S, Singleton J, Brennan S, Marcum S, Condit M, Lee C, Kato C, Tonnetti L, Stramer SL, Paddock CD. Straily A, et al. J Infect Dis. 2020 Mar 28;221(8):1371-1378. doi: 10.1093/infdis/jiz316. J Infect Dis. 2020. PMID: 31267128
METHODS: Donor serum samples were evaluated by indirect immunofluorescence antibody assay to identify immunoglobulin G (IgG) antibodies reactive with Rickettsia rickettsii. ...RESULTS: Of the Georgia donors (n = 1493), 11.1% demonstrated antibody titers reactive wit …
METHODS: Donor serum samples were evaluated by indirect immunofluorescence antibody assay to identify immunoglobulin G (IgG) antibodies reac …
The prevalence of rickettsial and ehrlichial organisms in Amblyomma americanum ticks collected from Ohio and surrounding areas between 2000 and 2010.
Fitak RR, Kelly DJ, Daniels MK, Jiang J, Richards AL, Fuerst PA. Fitak RR, et al. Ticks Tick Borne Dis. 2014 Oct;5(6):797-800. doi: 10.1016/j.ttbdis.2014.06.005. Epub 2014 Jul 22. Ticks Tick Borne Dis. 2014. PMID: 25108789
The lone star tick, Amblyomma americanum, feeds upon a variety of hosts and is a known vector of several human pathogens. In Ohio, populations of A. americanum have been expanding their range and increasing in abundance and distribution, thereby elevating the …
The lone star tick, Amblyomma americanum, feeds upon a variety of hosts and is a known vector of several human pathogens. In O …
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