2,393 results match your criteria Rickettsialpox


Development of a rapid and visual detection method for Rickettsia rickettsii combining recombinase polymerase assay with lateral flow test.

PLoS One 2018 26;13(11):e0207811. Epub 2018 Nov 26.

Huadong Research Institute for Medicine and Biotechniques, Nanjing, Jiangsu, China.

Objectives: Rickettsia rickettsii is the causative agent of Rocky Mountain spotted fever, which is the most severe spotted fever group (SFG) rickettsiosis. Developing a simple and reliable detection method is required.

Methods: A detection method for R. Read More

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November 2018
8 Reads

Ocular manifestations of in South India.

Indian J Ophthalmol 2018 Dec;66(12):1840-1844

Resident, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Salem, Tamil Nadu, India.

Purpose: Among the major groups of rickettsiosis, the commonly reported diseases in India are: (a) Typhus group induced-scrub typhus, murine flea-borne typhus; (b) Spotted fever group induced-Indian tick typhus; and (c) Q fever. Though many scrub typhus outbreaks have been reported from India, only one outbreak of spotted fever-serologically proven Indian tick typhus (Rickettsia conorii)-has been reported. We report for the first time ocular manifestations of serologically proven R. Read More

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December 2018
3 Reads

Seroprevalence of spotted fever group and typhus group rickettsiae in individuals with acute febrile illness from Gorakhpur, India.

Int J Infect Dis 2018 Nov 1. Epub 2018 Nov 1.

Indian Council of Medical Research, New Delhi, India.

Background: Our aim was to estimate the seroprevalence of spotted fever group (SFG) and typhus group (TG) rickettsiae among individuals with acute febrile illness (AFI) in the scrub typhus endemic Gorakhpur district, India; one of the worst affected by annual seasonal acute encephalitis syndrome (AES) outbreaks.

Methods: Antibodies against SFG and TG rickettsiae and the associated risk factors were determined in 294 individuals presenting with AFI, encountered during a community based survey conducted during AES outbreak period October-November 2016.

Results: IgM and IgG seropositivity for SFG was 13. Read More

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November 2018
1 Read
2.330 Impact Factor

Vector Tick Transmission Model of Spotted Fever Rickettsiosis.

Am J Pathol 2018 Oct 11. Epub 2018 Oct 11.

Department of Pathology, University of Texas Medical Branch at Galveston, Galveston, Texas.

Many aspects of rickettsial infections have been characterized, including pathogenic and immune pathways and mechanisms of rickettsial survival within the vertebrate host and tick vector. However, very few studies are focused on the complex pathogen-vector-host interactions during tick feeding. Therefore, our objective was to develop a tick transmission model of the spotted fever group of rickettsial infections to study the initial events in disease development. Read More

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October 2018

Detection of zoonotic agents and a new Rickettsia strain in ticks from donkeys from South Africa: Implications for travel medicine.

Travel Med Infect Dis 2018 Oct 9. Epub 2018 Oct 9.

Centre of Rickettsiosis and Arthropod-Borne Diseases, Hospital Universitario San Pedro-CIBIR, Logroño, La Rioja, Spain. Electronic address:

Background: In rural South Africa, people are in close contact with tick-infested donkeys. This study aimed to investigate the presence of spotted fever group Rickettsia, Anaplasma, Ehrlichia and Coxiella species in these arthropods.

Method: 376 ticks (7 species) from donkeys from Limpopo Province (South Africa) were pooled and analyzed using PCR assays for the bacterium detection. Read More

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October 2018
1 Read

[Fatal spotted fever in Salta province].

Medicina (B Aires) 2018 ;78(5):356-359

Departamento de Medicina Interna y Terapia Intensiva, Hospital Papa Francisco, Salta, Argentina. E-mail:

We describe the case of a 17-year-old male patient living in Salta city who, 10 days after visiting a rural area in Salta province, was hospitalized for febrile seizures. Shortly after admission, he developed an exanthema followed by a multiple organ dysfunction that evolved to irreversible septic shock followed by death 48 hours after admission. Serological diagnosis -high IgM and IgG anti-Rickettsia spp. Read More

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January 2018
10 Reads

Serological evidence of spotted fever group rickettsiosis in and around Puducherry, south India-A three years study.

J Vector Borne Dis 2018 Apr-Jun;55(2):144-150

Department of General Medicine and Microbiology, Indira Gandhi Govt. General Hospital and Post Graduate Institute, Puducherry, India.

Background & Objectives: Rickettsial diseases are important re-emerging infections that mostly go unnoticed or are misdiagnosed. Though few case reports of Indian tick typhus have been reported in Indian literature in the past 10 yr, prevalence surveys are few and far between. The objective of this research was to study the seroprevalence of spotted fever (SF) group rickettsiosis and its coinfection with scrub typhus (ST) in Puducherry region of south India, as these two diseases may show similar clinical presentations. Read More

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October 2018
1 Read

Spotted Fever Rickettsiosis in a Wildlife Researcher in Sabah, Malaysia: A Case Study.

Trop Med Infect Dis 2018 Mar 6;3(1). Epub 2018 Mar 6.

Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Churchill Hospital, Oxford OX3 7FZ, UK.

We present evidence for a case of spotted fever rickettsiosis with severe complications in a young adult male. Although spotted fever group rickettsiae (SFGR) have been reported as the most prevalent cause of rickettsiosis in rural areas of Sabah, Malaysia since the 1980s, this is the first detailed case report of suspected SFGR in the state. Current data on the prevalence, type, and thorough clinical reports on complications of SFGR and other rickettsioses in Sabah is lacking and required to raise the awareness of such diseases. Read More

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The Re-Emergence and Emergence of Vector-Borne Rickettsioses in Taiwan.

Trop Med Infect Dis 2017 Dec 21;3(1). Epub 2017 Dec 21.

Institute of Environmental Health, College of Public Health, National Taiwan University, No. 17, Xu-Zhou Road, Taipei 100, Taiwan.

Rickettsial diseases, particularly vector-borne rickettsioses (VBR), have a long history in Taiwan, with studies on scrub typhus and murine typhus dating back over a century. The climatic and geographic diversity of Taiwan's main island and its offshore islands provide many ecological niches for the diversification and maintenance of rickettsiae alike. In recent decades, scrub typhus has re-emerged as the most prevalent type of rickettsiosis in Taiwan, particularly in eastern Taiwan and its offshore islands. Read More

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December 2017
5 Reads

Mediterranean spotted fever rickettsiosis in Italy, 2001-2015: Spatio-temporal distribution based on hospitalization records.

Ticks Tick Borne Dis 2019 Jan 3;10(1):43-50. Epub 2018 Sep 3.

Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy.

The Mediterranean spotted fever (MSF) rickettsiosis is the predominant rickettsial disease among the spotted fever group (SFG) rickettsiae in the Mediterranean countries and North Africa. Its causative agent is Rickettsia conorii, although, SFG rickettsiosis - cases due to Rickettsia monacensis, Rickettsia massiliae and Rickettsia aeschlimannii were also described. A retrospective study based on hospital discharge records with a diagnosis of SFG rickettsiosis was carried out to describe the spatial pattern, the trend of the disease, and the epidemiological characteristics of persons hospitalized in the period 2001-2015. Read More

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January 2019
1 Read

Evidence of locally acquired spotted fever group rickettsioses in Southeast Texas, 2008-2016.

Zoonoses Public Health 2018 11 27;65(7):897-901. Epub 2018 Aug 27.

Section of Pediatric Tropical Medicine, Department of Pediatrics, National School of Tropical Medicine, Baylor College of Medicine and Texas Children's Hospital, Houston, Texas.

We identified six paediatric case-patients from southeast Texas diagnosed with confirmed or probable Spotted Fever Group Rickettsiosis (SFGR) between 2008 and 2016. Only one case had a history of travel to an endemic area. Clinical and laboratory findings strongly suggest locally acquired Rocky Mountain Spotted Fever in one Houston patient. Read More

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November 2018
2 Reads

Detection of Rickettsia monacensis and Rickettsia amblyommatis in ticks collected from dogs in Costa Rica and Nicaragua.

Ticks Tick Borne Dis 2018 Sep 6;9(6):1565-1572. Epub 2018 Aug 6.

Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Buenteweg 17, 30559 Hanover, Germany. Electronic address:

The neotropical climate of Central America provides ideal conditions for ticks, which may transmit several human pathogens, including spotted-fever group Rickettsia. Dogs may act as sentinels or reservoirs for human tick-borne diseases due to shared tick species. Here, ticks were collected from 680 client-owned dogs in Nicaragua and Costa Rica, and a total of 316 tick pools were investigated for Rickettsia infection by quantitative real-time PCR (qPCR) targeting the gltA gene. Read More

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September 2018
6 Reads

Effects of Rickettsia amblyommatis Infection on the Vector Competence of Amblyomma americanum Ticks for Rickettsia rickettsii.

Vector Borne Zoonotic Dis 2018 11 10;18(11):579-587. Epub 2018 Aug 10.

Rickettsial Zoonoses Branch, Centers for Disease Control and Prevention , Atlanta, Georgia .

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. The lone star tick is an aggressive human-biting tick abundant in the South, Central, and Mid-Atlantic United States, which has been shown to be a competent vector of R. Read More

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November 2018
2 Reads

First molecular detection of the human pathogen Rickettsia raoultii and other spotted fever group rickettsiae in Ixodid ticks from wild and domestic mammals.

Parasitol Res 2018 Nov 4;117(11):3421-3429. Epub 2018 Aug 4.

Istituto Zooprofilattico Sperimentale della Sardegna, Via Duca degli Abruzzi, 8, 07100, Sassari, Italy.

Tick-borne rickettsioses are recognized as emerging vector-borne infections capable of infecting both human and animal hosts worldwide. This study focuses on the detection and molecular identification of species belonging to the genus Rickettsia in ticks sampled from human, vegetation, and domestic and wild vertebrates in Sardinia. Ticks were tested by PCR targeting gltA, ompA, and ompB genes, followed by sequencing analysis. Read More

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November 2018

Septic Shock Caused by Rocky Mountain Spotted Fever in a Suburban Texas Patient with Pet Dog Exposure: A Case Report.

Am J Case Rep 2018 Aug 4;19:917-919. Epub 2018 Aug 4.

Department of Internal Medicine, The Methodist Hospital, Houston, TX, USA.

BACKGROUND Rocky Mountain spotted fever (RMSF) is associated with high mortality and requires prompt identification and treatment to ensure better outcomes. CASE REPORT We describe an advanced case of RMSF in a 45-year-old female patient with pet dog exposure who presented with altered mental status, dyspnea, and ataxia progressing to septic shock and acute hypoxic respiratory failure requiring intubation and mechanical ventilation. CONCLUSIONS This case illustrates the importance of keeping RMSF in the differential diagnosis in patient populations outside of the usual geographic areas of incidence in the appropriate clinical setting. Read More

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August 2018
8 Reads

The prevalence and clinical characteristics of tick-borne diseases at One Sentinel Hospital in Northeastern China.

Parasitology 2018 Aug 1:1-7. Epub 2018 Aug 1.

State Key Laboratory of Pathogen and Biosecurity,Beijing Institute of Microbiology and Epidemiology,Beijing 100071,P.R. China.

Northeastern China is a region of high tick abundance, multiple tick-borne pathogens and likely human infections. The spectrum of diseases caused by tick-borne pathogens has not been objectively evaluated in this region for clinical management and for comparison with other regions globally where tick-transmitted diseases are common. Based on clinical symptoms, PCR, indirect immunofluorescent assay and (or) blood smear, we identified and described tick-borne diseases from patients with recent tick bite seen at Mudanjiang Forestry Central Hospital. Read More

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August 2018
6 Reads

Case Report: Typhoid Fever and Spotted Fever Group Rickettsiosis Presenting Concomitantly in an Indian Immigrant.

Am J Trop Med Hyg 2018 Oct;99(4):864-866

The Ruth and Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.

We present a rare case of an Indian immigrant suffering from concomitant infection of and spotted fever group . We discuss the scarce reports of dual infections from the developing world and the related diagnostic challenges. Read More

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October 2018
2 Reads

[A complicated clinical course of tick-borne rickettsiosis after safari in South Africa].

Dtsch Med Wochenschr 2018 08 30;143(15):1116-1119. Epub 2018 Jul 30.

IV. Medizinische Klinik und Poliklinik der LMU, München.

History: A healthy 41 year old man was bitten by a tick while on safari in the Kruger National Park in South Africa. He developed severe fever and malaise 5 days later. A characteristic red skin sore with a dark centre and surrounding erythema (eschar, tache noir) developed at the site of the tick bite. Read More

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August 2018
5 Reads

A review of the genus in Central America.

Res Rep Trop Med 2018 29;9:103-112. Epub 2018 Jun 29.

Vector Research Laboratory, Tropical Diseases Research Center, Faculty of Microbiology, University of Costa Rica, San Jose, Costa Rica.

In this paper, we present a historical review of rickettsiosis in Central America and also the most recent findings of in ectoparasites. All countries of Central America have records of rickettsiosis. Regarding the typhus group rickettsioses, there is clinical or serological evidence of in Guatemala, in Panama, Guatemala, and Costa Rica and unidentified species of the typhus group in El Salvador. Read More

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June 2018
10 Reads

Rickettsia Species Isolated from Dermacentor occidentalis (Acari: Ixodidae) from California.

J Med Entomol 2018 Oct;55(6):1555-1560

Vector-Borne Disease Section, Division of Communicable Disease Control, California Department of Public Health, Richmond, CA.

The Pacific Coast tick (Dermacentor occidentalis Marx, 1892) is one of the most widely distributed and frequently encountered tick species in California. This tick is the primary vector of an unclassified spotted fever group rickettsial pathogen, designated currently as Rickettsia 364D, the etiologic agent of a recently recognized tick-borne rickettsiosis known as Pacific Coast tick fever. Despite intensified interest in this pathogen, important questions remain regarding its taxonomic status and possible variations in genotype among different strains that could influence its pathogenicity. Read More

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October 2018
1 Read

Molecular survey of Rickettsia spp. in the Neotropical deer tick Haemaphysalis juxtakochi from Brazilian Pampa.

Parasitol Res 2018 Oct 6;117(10):3293-3298. Epub 2018 Jul 6.

Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF), Estrada do Conde, 6000, mail box 47, Eldorado do Sul, Rio Grande do Sul, 92990-000, Brazil.

Spotted fever (SF) is a tick-borne disease associated with Rickettsia spp.. In the Pampa biome, Southern Brazil, cases of SF seem to be strongly linked with the practice of hunting wild animals. Read More

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October 2018
6 Reads

Molecular evidence of in spleen of wild boars in northeastern Algeria.

New Microbes New Infect 2018 Jul 29;24:17-20. Epub 2018 Mar 29.

Université Chadli Bendjedid, département des sciences vétérinaires, El Tarf, Algeria.

Using molecular assays, the agent of a spotted fever group rickettsiosis resulting in scalp eschar and neck lymphadenopathy after tick bite, was assessed in 92 spleens recovered from 117 wild boars hunted in the far northeast of Algeria. was detected in 5.4% of tested wild boar spleens. Read More

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July 2018
7 Reads

Mediterranean Spotted Fever in Children: Study of a Portuguese Endemic Region.

Acta Med Port 2018 Apr 30;31(4):196-200. Epub 2018 Apr 30.

Pediatric Department. Centro Hospitalar de Trás-os-Montes e Alto Douro. Vila Real, Portugal.

Introduction: Mediterranean spotted fever is an infectious disease included in the human rickettsiosis group, with its main distribution in the Mediterranean and South European countries. It is an endemic disease in Portugal, with dogs acting as the main domestic reservoir. Children are a particularly vulnerable group due to their close contact with household animals and by frequently playing outdoors. Read More

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April 2018
8 Reads

Fatal case of spotted fever in a patient from Northeastern Brazil.

Rev Inst Med Trop Sao Paulo 2018 28;60:e21. Epub 2018 May 28.

Laboratório de Referência Nacional para Vetores das Riquetsioses, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil.

Spotted fevers are diseases caused by bacterial agents belonging to the spotted-fever (SF) group of the genus Rickettsia. The first documented case of SF in Pernambuco State, Northeast Brazil, was reported here. Also, it is the first case described of fatal SF in Northeast region of Brazil. Read More

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June 2018
10 Reads

Ocular manifestations of rickettsia in children: common but frequently overlooked.

BMJ Case Rep 2018 May 18;2018. Epub 2018 May 18.

Ophthalmology Department, Centro Hospitalar Tondela-Viseu, Viseu, Portugal.

We review two cases of ocular manifestations of infection in children. A girl who presented unilateral visual loss with focal retinitis and macular oedema and a boy with unilateral central scotoma and bilateral anterior uveitis. Progressive functional and anatomic recovery was observed after oral antibiotics and steroids were initiated. Read More

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May 2018
2 Reads

Case 14-2018: A 68-Year-Old Woman with a Rash, Hyponatremia, and Uveitis.

N Engl J Med 2018 May;378(19):1825-1833

From the Departments of Medicine (M.L.P., E.P.H.) and Pathology (R.K.F., K.C.C.), Massachusetts General Hospital, and the Departments of Medicine (M.L.P., E.P.H.) and Pathology (R.K.F., K.C.C.), Harvard Medical School - both in Boston.

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Timeliness in the notification of spotted fever in Brazil: Evaluating compulsory reporting strategies and digital disease detection.

Int J Infect Dis 2018 Jul 3;72:16-18. Epub 2018 May 3.

Seção de Epidemiologia Hospitalar, Hospital de Clínicas, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil; Departamento de Vigilância em Saúde de Campinas, Campinas, São Paulo, Brazil.

Spotted fever is caused by rickettsia species, and is the most important tick-borne disease. In Brazil, it requires national compulsory notification to the Ministry of Health. Since 2007, all suspected cases of spotted fever have been integrated into the Notifiable Diseases Information System (SINAN). Read More

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July 2018
2 Reads

Vital Signs: Trends in Reported Vectorborne Disease Cases - United States and Territories, 2004-2016.

MMWR Morb Mortal Wkly Rep 2018 May 4;67(17):496-501. Epub 2018 May 4.

Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, CDC, Fort Collins, Colorado.

Introduction: Vectorborne diseases are major causes of death and illness worldwide. In the United States, the most common vectorborne pathogens are transmitted by ticks or mosquitoes, including those causing Lyme disease; Rocky Mountain spotted fever; and West Nile, dengue, and Zika virus diseases. This report examines trends in occurrence of nationally reportable vectorborne diseases during 2004-2016. Read More

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May 2018
50 Reads

Analysis of the environmental and host-related factors affecting the distribution of the tick Dermacentor marginatus.

Exp Appl Acarol 2018 Jun 30;75(2):209-225. Epub 2018 Apr 30.

Department of Veterinary Sciences, University of Turin, Via L. da Vinci 44, 10095, Grugliasco, Turin, Italy.

Understanding and responding to the ecological, social and economic conditions that facilitate disease emergence and transmission represents a substantial challenge for epidemiologists and health professionals. In this article we integrate knowledge about the human and the vector population, to provide a context from which to examine the underlying causal factors of D. marginatus-borne diseases emergence in the study area. Read More

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June 2018
4 Reads

Evaluation of Diagnostic Assay for Rickettsioses Using Duplex Real-Time PCR in Multiple Laboratories in Japan.

Jpn J Infect Dis 2018 Jul 27;71(4):267-273. Epub 2018 Apr 27.

Department of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka.

Tsutsugamushi disease and Japanese spotted fever are representative rickettsioses in Japan, and are caused by infection with Orientia tsutsugamushi and Rickettsia japonica, respectively. For molecular-based diagnosis, conventional PCR assays, which independently amplify respective rickettsial DNA, are usually used; however, this approach is time-consuming. Here, we describe a new duplex real-time PCR assay for the simultaneous detection of O. Read More

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July 2018
4 Reads

The rice rat Euryoryzomys russatus, a competent amplifying host of Rickettsia parkeri strain Atlantic rainforest for the tick Amblyomma ovale.

Ticks Tick Borne Dis 2018 07 20;9(5):1133-1136. Epub 2018 Apr 20.

Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brazil. Electronic address:

Rickettsia parkeri strain Atlantic rainforest (SAR) is the etiological agent of a spotted fever group rickettsiosis in Brazil, where it is transmitted to humans by the tick Amblyomma ovale. A previous study demonstrated that R. parkeri SAR was successfully maintained in A. Read More

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July 2018
2 Reads

Distribution of tick-borne diseases in Japan: Past patterns and implications for the future.

J Infect Chemother 2018 Jul;24(7):499-504

Department of Tropical Medicine and Center for Medical Entomology, The Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Tokyo, 105-8461, Japan. Electronic address:

The rapid geographical spread of tick-borne diseases (TBDs) worldwide has recently provoked significant concerns amongst public health authorities. Tick-borne pathogens are maintained in enzootic cycles involving ticks and wild animal hosts, with epizootic spread to other mammals, including livestock and humans. Despite the increasing public health concern, current TBD diagnostic tests and treatments are inadequate, and predictive models of future risks posed by TBDs are limited by the heterogeneity of environmental, vector, and host factors, even in neighboring regions. Read More

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July 2018
1 Read

A 2015 outbreak of flea-borne rickettsiosis in San Gabriel Valley, Los Angeles County, California.

PLoS Negl Trop Dis 2018 04 20;12(4):e0006385. Epub 2018 Apr 20.

San Gabriel Valley Mosquito and Vector Control District, West Covina, California, United States of America.

Although flea-borne rickettsiosis is endemic in Los Angeles County, outbreaks are rare. In the spring of 2015 three human cases of flea-borne rickettsiosis among residents of a mobile home community (MHC) prompted an investigation. Fleas were ubiquitous in common areas due to presence of flea-infested opossums and overabundant outdoor cats and dogs. Read More

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April 2018
7 Reads

[A fatal case series of Rocky Mountain spotted fever in Sonora, México].

Biomedica 2018 Mar 15;38(1):69-76. Epub 2018 Mar 15.

Departamento de Medicina y Ciencias de la Salud, Universidad de Sonora, Hermosillo, México.

Introduction: Rocky Mountain spotted fever is a highly lethal infectious disease, particularly if specific treatment with doxycycline is given belatedly.

Objective: To describe the clinical profile of fatal Rocky Mountain spotted fever cases in hospitalized patients in the state of Sonora, México.

Materials And Methods: We conducted a cross-sectional study on a series of 47 deaths caused by Rickettsia rickettsii from 2013 to 2016. Read More

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March 2018
2 Reads

Prevalence of Selected Zoonotic Diseases and Risk Factors at a Human-Wildlife-Livestock Interface in Mpumalanga Province, South Africa.

Vector Borne Zoonotic Dis 2018 06 17;18(6):303-310. Epub 2018 Apr 17.

3 Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases , Sandringham, South Africa .

A lack of surveillance and diagnostics for zoonotic diseases in rural human clinics limits clinical awareness of these diseases. We assessed the prevalence of nine zoonotic pathogens in a pastoral, low-income, HIV-endemic community bordering wildlife reserves in South Africa. Two groups of participants were included: malaria-negative acute febrile illness (AFI) patients, called febrilers, at three clinics (n = 74) and second, farmers, herders, and veterinary staff found at five government cattle dip-tanks, called dip-tanksters (n = 64). Read More

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June 2018
14 Reads

Bacterial and protozoal pathogens found in ticks collected from humans in Corum province of Turkey.

PLoS Negl Trop Dis 2018 04 12;12(4):e0006395. Epub 2018 Apr 12.

Department of Medical Microbiology, Hitit University, Corum, Turkey.

Background: Tick-borne diseases are increasing all over the word, including Turkey. The aim of this study was to determine the bacterial and protozoan vector-borne pathogens in ticks infesting humans in the Corum province of Turkey.

Methodology/principal Findings: From March to November 2014 a total of 322 ticks were collected from patients who attended the local hospitals with tick bites. Read More

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April 2018
1 Read

Molecular detection of spotted fever group rickettsiae in ticks from Cameroon.

Ticks Tick Borne Dis 2018 05 29;9(4):1049-1056. Epub 2018 Mar 29.

Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, 20359 Hamburg, Germany. Electronic address:

In western and eastern Africa, rickettsioses are one cause of fever in humans. Little is known regarding the presence of Rickettsia sp. in northern Cameroon. Read More

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May 2018
3 Reads

New records of tick-associated spotted fever group Rickettsia in an Amazon-Savannah ecotone, Brazil.

Ticks Tick Borne Dis 2018 05 22;9(4):1038-1044. Epub 2018 Mar 22.

Laboratórios de Biologia Molecular e do Carrapato, Brazilian Agricultural Research Corporation, Av. Rádio Maia, n° 830, Zona Rural, Campo Grande, MS, CEP 79106-550, Brazil.

Human rickettsiosis has been recorded in the Amazon Biome. However, the epidemiological cycle of causative rickettsiae has not been fully accounted for in the Amazon region. This study investigates the presence of spotted fever group (SFG) Rickettsia spp. Read More

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May 2018
1 Read

Phylogenetic studies of bacteria (Rickettsia, Coxiella, and Anaplasma) in Amblyomma and Dermacentor ticks in Thailand and their co-infection.

Ticks Tick Borne Dis 2018 05 27;9(4):963-971. Epub 2018 Mar 27.

Biodiversity Research Cluster, Department of Biology, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok, Thailand; Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University at Salaya, Phutthamonthon 4 Road, Nakhon Pathom, Thailand. Electronic address:

In this study, we attempted to detect Rickettsia, Coxiella and Anaplasma bacteria in one hundred and fourteen-Dermacentor and thirty three-Amblyomma unfed adult ticks that were collected from under leaves along animal trails at different places across Thailand. PCR amplification was used to identify bacterial infection with general conserved sequences of bacteria. The results revealed single infection in Amblyomma testudinarium ticks with Rickettsia (24%) and Coxiella (6%). Read More

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spp. co-infections in patients with skin changes and lymphadenopathy.

Arch Med Sci 2018 Mar 13;14(2):357-360. Epub 2016 Jun 13.

National Institute of Public Health - National Institute of Hygiene, Warsaw, Poland.

Introduction: Tularemia and spotted fever group rickettsioses (SFG) can be transmitted by ticks and have a number of common clinical symptoms. Most characteristic are a maculopapular or vesicular rash or an eschar at the site of the tick or insect bite accompanied by painful lymph nodes. The aim of this study was to determine whether spp. Read More

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March 2018
4 Reads

Detection of Rickettsia spp. in ticks (Acari: Ixodidae) of domestic animals in Colombia.

Ticks Tick Borne Dis 2018 05 9;9(4):819-823. Epub 2018 Mar 9.

Departamento de Biologia, Instituto de Biociências, UNESP - Universidade Estadual Paulista, Avenida 24-A, 1515, Bairro Bela Vista, Rio Claro, SP, CEP13506-900, Brazil.

Rickettsiosis are emerging or re-emerging diseases, with a worldwide distribution associated to transmission by arthropod vectors. Rickettsia species belong to the spotted fever group (SFG) and are transmitted by hard ticks (Acari: Ixodidae) that may act as vectors and reservoirs. This study carried out a molecular detection of Rickettsia from 7 species of the family Ixodidae collected from domestic hosts by PCR amplification of fragments of the citrate synthase "gltA" gene and outer membrane protein "ompA" gene. Read More

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May 2018
2 Reads

Tick borne illness - Rocky mountain spotted fever.

Authors:
Robin B McFee

Dis Mon 2018 May 15;64(5):185-194. Epub 2018 Mar 15.

Department of Emergency/Family Medicine, Debusk College of Osteopathic Medicine, Lincoln Memorial University, USA. Electronic address:

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May 2018
3 Reads

Rickettsia amblyommatis infecting Amblyomma pseudoconcolor in area of new focus of spotted fever in northeast Brazil.

Acta Trop 2018 Jun 12;182:305-308. Epub 2018 Mar 12.

Fundação Oswaldo Cruz/Instituto Oswaldo Cruz/(FIOCRUZ/IOC), Laboratório de Referência Nacional em Vetores das Riquetsioses (LIRN), Rio de Janeiro, RJ, Brazil. Electronic address:

In Brazil, active infections of Rickettsia spp. is confirmed in all regions, involving various species of ticks. During investigation of a new focus of Spotted Fever (SF) incidence in the state of Pernambuco, northeastern Brazil, tick species Rhipicephalus sanguineus sensu lato (Latreille), and Amblyomma pseudoconcolor were collected from one Canis familiaris and four Euphractus sexcinctus, respectively, and analized for the presence of rickettsial genes. Read More

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June 2018
6 Reads

Detection and characterization of a novel spotted fever group Rickettsia genotype in Haemaphysalis leporispalustris from California, USA.

Ticks Tick Borne Dis 2018 05 1;9(4):814-818. Epub 2018 Mar 1.

California Division of Communicable Disease Control, California Department of Public Health, Richmond, CA, United States.

The rabbit tick, Haemaphysalis leporispalustris Packard, is known for its association with Rickettsia rickettsii as it harbors both virulent and avirulent strains of this pathogen. In this manuscript we report findings and preliminary characterization of a novel spotted fever group rickettsia (SFGR) in rabbit ticks from California, USA. Rickettsia sp. Read More

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May 2018
3 Reads

What's eating you? clinical manifestations of Dermacentor tick bites.

Cutis 2018 Jan;101(1):19;20;36

Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina, Charleston, USA.

Dermacentor ticks are hard ticks found throughout most of North America and are easily identified by their large size, ornate scutum, and prominent dorsal pits. They are important disease vectors and are implicated in transmission of Rocky Mountain spotted fever (RMSF), Colorado tick fever, tularemia, and erlichiosis. They also are an important cause of fatal tick paralysis. Read More

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January 2018
13 Reads

EMERGING INFECTIOUS DISEASES - OVERVIEW.

Authors:
Robin B McFee

Dis Mon 2018 May 7;64(5):163-169. Epub 2018 Mar 7.

Debusk College of Osteopathic Medicine, Lincoln Memorial University. Electronic address:

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May 2018
2 Reads

Widespread distribution of ticks and selected tick-borne pathogens in Kentucky (USA).

Ticks Tick Borne Dis 2018 03 2;9(3):738-741. Epub 2018 Mar 2.

Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602, USA; Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA. Electronic address:

The geographical distribution of Ixodes scapularis and Amblyomma maculatum ticks is poorly understood in Kentucky. We conducted a convenience survey of wildlife species (white-tailed deer (Odocoileus virginianus), elk (Cervus canadensis) and black bears (Ursus americanus)) for ticks from October 2015 to January 2017. We detected four tick species including Amblyomma americanum, Dermacentor albipictus, I. Read More

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March 2018
4 Reads

Rocky Mountain spotted fever: brain imaging findings.

Braz J Infect Dis 2018 Mar - Apr;22(2):153-154. Epub 2018 Mar 1.

Universidade Estadual de Campinas, Departamento de Clínica Médica, Campinas, SP, Brazil.

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June 2018
6 Reads

[Some information regarding the historical development of typhoid fever in Chile].

Authors:
Enrique Laval

Rev Chilena Infectol 2017 Oct;34(5):491-493

Facultad de Medicina, Pontificia Universidad Católica de Chile, Chile.

During the historical development of typhoid fever in Chile, its confusion with other infectious diseases is particularly noteworthy, especially with murine typhus, a problem that was mainly resolved during the 1918 epidemic. The importance of chloramphenicol treatment is also highlighted, which meant an enormous improvement in typhoid/paratyphoid fevers, in combination with public health and health education actions that allowed to almost eliminate these infectious diseases in our country. Read More

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October 2017
1 Read

An autochthonous confirmed case of Rickettsia parkeri rickettsiosis in Uruguay.

Ticks Tick Borne Dis 2018 03 21;9(3):718-719. Epub 2018 Feb 21.

Laboratorio de Vectores y enfermedades transmitidas, CENUR Litoral Norte - Salto, Universidad de la República, Rivera 1350, Salto, CP 50000, Uruguay.

Rickettsia parkeri, a member of the spotted fever group (SFG) rickettsiae, was first confirmed as an etiological agent of human rickettsiosis in 2004. Nearly all cases are characterized by an inoculation eschar, and no fatalities have been reported. In Uruguay, probable human cases of R. Read More

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March 2018
4 Reads