scholarly journals Spotted Fever Group Rickettsiae in Multiple Hard Tick Species from Fairfax County, Virginia

2014 ◽  
Vol 14 (7) ◽  
pp. 482-485 ◽  
Author(s):  
Tyler C. Henning ◽  
John M. Orr ◽  
Joshua D. Smith ◽  
Jorge R. Arias ◽  
Douglas E. Norris
Keyword(s):  
Tick Species ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Hard Tick ◽  
Fairfax County ◽  
Spotted Fever Group Rickettsiae

Ticks and tick-borne pathogens in China.

2021 ◽  
pp. 492-499
Author(s):  
Hao Li ◽  
Li-Qun Fang ◽  
Wei Liu
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Expert Opinion ◽  
Tick Species ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Human Beings ◽  
Potential Influence ◽  
Spotted Fever Group Rickettsiae ◽  
Tick Vectors

Abstract This expert opinion provides an overview of the type and distribution of tick species and emerging tick-borne pathogens in tick vectors and human beings (such as Anaplasma, Babesia, spotted fever group rickettsiae, Borrelia and viruses) in China and considers the potential influence of global warming and climate change.

scholarly journals Detection of tick-borne rickettsial pathogens in naturally infected dogs and dog-associated ticks in Medellin, Colombia

2020 ◽  
Vol 29 (3) ◽  
Author(s):  
Esteban Arroyave ◽  
Emily Rose Cornwell ◽  
Jere Williams McBride ◽  
Carlos Arley Díaz ◽  
Marcelo Bahia Labruna ◽  
...  
Keyword(s):  
16S Rrna ◽  
Potential Risk ◽  
Tick Species ◽  
Spotted Fever ◽  
Rhipicephalus Sanguineus ◽  
Spotted Fever Group ◽  
Infection Rates ◽  
Serological Evidence ◽  
Spotted Fever Group Rickettsiae ◽  
Rickettsial Infections

Abstract Tick-borne rickettsial pathogens (TBRP) are important causes of infections in both dogs and humans. Dogs play an important role as a biological host for several tick species and can serve as sentinels for rickettsial infections. Our aim was to determine the presence of TBRP in dogs and in dog-associated ticks and their potential risk to human diseases in Medellin, Colombia. DNA for E. canis (16S rRNA and dsb) and A. platys (groEl) was detected in 17.6% (53/300) and 2.6% (8/300) of dogs, respectively. Antibodies against Ehrlichia spp. 82 (27.3%) and Anaplasma spp. 8 (2.6%) were detected in dogs. Antibody reactivity against both agents were found in 16 dogs (5.3%). Eight dogs showed antibody for Rickettsia spp. with titers that suggest 3 of them had a probable exposure to R. parkeri. Rhipicephalus sanguineus s.l. (178/193) was the main tick in dogs, followed by R. microplus (15/193). The minimum infection rates (MIR) in R. sanguineus were 11.8% for E. canis and 3.4% for A. platys. E. canis and A. platys are the main TBRP infecting dogs and ticks and R. sanguineus s.l. is likely involved in the transmission of both agents. Interestingly, we found serological evidence of exposure in dogs for spotted fever group rickettsiae.

scholarly journals Isolation of spotted fever group rickettsiae from Ixodes persulcatus ticks in the central part of Hokkaido, Japan

2000 ◽  
Vol 51 (1) ◽  
pp. 55-58 ◽  
Author(s):  
Hiromi FUJITA ◽  
Nobuhiro TAKADA ◽  
Emiko ISOGAI ◽  
Yuriko WATANABE ◽  
Takuya ITO
Keyword(s):  
Spotted Fever ◽  
Ixodes Persulcatus ◽  
Spotted Fever Group ◽  
Spotted Fever Group Rickettsiae

scholarly journals Seroepidemiologic Study of Human Infections with Spotted Fever Group Rickettsiae in North Carolina

2014 ◽  
Vol 52 (11) ◽  
pp. 3960-3966 ◽  
Author(s):  
M. F. Vaughn ◽  
J. Delisle ◽  
J. Johnson ◽  
G. Daves ◽  
C. Williams ◽  
...  
Keyword(s):  
North Carolina ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Spotted Fever Group Rickettsiae ◽  
Human Infections ◽  
Seroepidemiologic Study

Collaborating With Community Scientists Across Arkansas to Update Tick Distributions and Pathogen Prevalence of Spotted Fever Group Rickettsia and Ehrlichia

2021 ◽  
Author(s):  
Ashley P G Dowling ◽  
Sean G Young ◽  
Kelly Loftin
Keyword(s):  
Tick Species ◽  
Spotted Fever ◽  
Dermacentor Variabilis ◽  
Amblyomma Americanum ◽  
Spotted Fever Group ◽  
Primary Role ◽  
Prevalence Rates ◽  
Spotted Fever Group Rickettsia ◽  
Community Science ◽  
Tick Distributions

Abstract Tick-borne diseases (TBD) in humans have dramatically increased over recent years and although the bulk of cases are attributable to Lyme Disease in the Northeastern US, TBDs like spotted fever rickettsiosis and ehrlichiosis heavily impact other parts of the country, namely the mid-south. Understanding tick and pathogen distributions and prevalence traditionally requires active surveillance, which quickly becomes logistically and financially unrealistic as the geographic area of focus increases. We report on a community science effort to survey ticks across Arkansas to obtain updated data on tick distributions and prevalence of human tick-borne disease-causing pathogens in the most commonly encountered ticks. During a 20-mo period, Arkansans submitted 9,002 ticks from 71 of the 75 counties in the state. Amblyomma americanum was the most common tick species received, accounting for 76% of total tick submissions. Nearly 6,000 samples were screened for spotted fever group Rickettsia (SFGR) and Ehrlichia, resulting in general prevalence rates of 37.4 and 5.1%, respectively. In addition, 145 ticks (2.5%) were infected with both SFGR and Ehrlichia. Arkansas Department of Health reported 2,281 spotted fever and 380 ehrlichiosis cases during the same period as our tick collections. Since known SFGR vectors Dermacentor variabilis and Amblyomma maculatum were not the most common ticks submitted, nor did they have the highest prevalence rates of SFGR, it appears that other tick species play the primary role in infecting humans with SFGR. Our investigation demonstrated the utility of community science to efficiently and economically survey ticks and identify vector-borne disease risk in Arkansas.

scholarly journals Spotted Fever Group Rickettsiae in Inner Mongolia, China, 2015–2016

2018 ◽  
Vol 24 (11) ◽  
pp. 2105-2107 ◽  
Author(s):  
Xuhong Yin ◽  
Shengchun Guo ◽  
Chunlian Ding ◽  
Minzhi Cao ◽  
Hiroki Kawabata ◽  
...  
Keyword(s):  
Inner Mongolia ◽  
Spotted Fever ◽  
Spotted Fever Group ◽  
Spotted Fever Group Rickettsiae

scholarly journals Classification of Tick Species and Detection of Tick-borne Pathogens in Yanbian, China

2020 ◽  
Author(s):  
Jixu Li ◽  
Shuang Zhang ◽  
Wanfeng Liang ◽  
Shaowei Zhao ◽  
Hao Wang ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
North Korea ◽  
Tick Species ◽  
Spotted Fever ◽  
Ixodes Persulcatus ◽  
Spotted Fever Group ◽  
Haemaphysalis Longicornis ◽  
Chain Reaction ◽  
Polymerase Chain ◽  
Severe Fever

Abstract BackgroundYanbian is located at the junction between China, Russia, and North Korea. We aimed to determine the species distribution and pathogens carried by ticks in Yanbian.MethodsA total of 2673 unattached ticks were collected from eight counties and cities in Yanbian and classified morphologically. Candidatus Rickettsia tarasevichiae (CRT), spotted fever group Rickettsia (SFGR), severe fever thrombocytopenia syndrome virus (SFTSV), Theileria, and other pathogens were detected using polymerase chain reaction (PCR) and real-time quantitative polymerase chain reaction followed by phylogenetic and genotypic analyses.ResultsAccording to the morphological classification, the main tick species in Yanbian were Haemaphysalis longicornis, Ixodes persulcatus, Dermacentor silvarum, Haemaphysalis japonica, and Haemaphysalis concinna. Candidatus Rickettsia tarasevichiae, spotted fever group Rickettsia, severe fever thrombocytopenia syndrome virus, and Theileria orientalis were detected in H. longicornis, Candidatus Rickettsia tarasevichiae, spotted fever group Rickettsia, and severe fever thrombocytopenia syndrome virus were detected in I. persulcatus, H. japonica, and D. silvarum, but only severe fever thrombocytopenia syndrome virus was detected in H. concinna. Mixed infection with Candidatus Rickettsia tarasevichiae and severe fever thrombocytopenia syndrome virus was found in I. persulcatus and H. japonica. The gene sequences of all tested pathogens exhibited 95.7%–100% homology with sequences registered in GenBank. Phylogenetic analysis showed that different spotted fever group Rickettsia and severe fever thrombocytopenia syndrome virus genotypes were closely related to the Korean strains. We provide the first evidence for the presence of the spotted fever group Rickettsia genotypes of Candidatus Rickettsia longicornii, ompA, ompB, sca4, and rrs, in Haemaphysalis longicornis in Yanbian. ConclusionsThese results provide epidemiological data to support the prevention and control of ticks and tick-borne diseases in the border areas of China, North Korea, and Russia.

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