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Scrub typhus

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https://www.readbyqxmd.com/read/28531311/the-genotypes-of-orientia-tsutsugamushi-identified-in-scrub-typhus-patients-in-northern-vietnam
#1
Hang L K Nguyen, Hang T T Pham, Tinh V Nguyen, Phuong Vm Hoang, Mai T Q Le, Taichiro Takemura, Futoshi Hasebe, Daisuke Hayasaka, Akio Yamada, Kozue Hotta
Background: There are an estimated one million patients with scrub typhus in the Asia-Pacific region. There are few reports describing the incidence of scrub typhus in Vietnam. Methods: Blood samples collected from 63 patients clinically diagnosed as having scrub typhus from July 2015 to September 2016 were subjected to genotyping of Orientia tsutsugamushi. Results and Conclusions: Of these patients, 42 (67%) tested positive for O. tsutsugamushi, and the most common genotype was identified to be Karp (55%)...
May 22, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28529271/evidence-of-infection-with-leptospira-interrogans-and-spotted-fever-group-rickettsiae-among-rodents-in-an-urban-area-of-osaka-city-japan
#2
Kenta Shimizu, Rie Isozumi, Kazutoshi Takami, Isao Kimata, Kanae Shiokawa, Kumiko Yoshimatsu, Yoshimi Tsuda, Sanae Nishio, Jiro Arikawa
We examined 33 rodents captured in an urban area of Osaka City, Japan for IgG antibodies against Seoul virus, severe fever with thrombocytopenia syndrome virus, hepatitis E virus, Leptospira interrogans, Yersinia pestis, spotted fever, typhus and scrub typhus group rickettsiae. We found that 3 (9.1%) and 1 (3.0%) of the 33 rodents had antibodies against L. interrogans and spotted fever group rickettsiae, respectively. DNAs of leptospires were detected from 2 of the 3 seropositive rodents, but DNA of rickettsia was not detected...
May 22, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28500808/seroprevalence-of-scrub-typhus-typhus-and-spotted-fever-among-rural-and-urban-populations-of-northern-vietnam
#3
Nguyen Vu Trung, Le Thi Hoi, Nguyen Thi Hong Thuong, Tran Khanh Toan, Tran Thi Kieu Huong, Tran Mai Hoa, Annette Fox, Nguyen van Kinh, H Rogier van Doorn, Heiman F L Wertheim, Juliet E Bryant, Behzad Nadjm
AbstractRickettsial infections are recognized as important causes of fever throughout southeast Asia. Herein, we determined the seroprevalence to rickettsioses within rural and urban populations of northern Vietnam. Prevalence of individuals with evidence of prior rickettsial infections (IgG positive) was surprisingly low, with 9.14% (83/908) testing positive to the three major rickettsial serogroups thought to circulate in the region. Prevalence of typhus group rickettsiae (TG)-specific antibodies (6.5%, 58/908) was significantly greater than scrub typhus group orientiae (STG)- or spotted fever group rickettsiae (SFG)-specific antibodies (P < 0...
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28500798/persistent-sick-sinus-syndrome-in-scrub-typhus
#4
Lae-Young Jung, Ji-Young Yoon, Soo-Kyeong Song, Chang-Seop Lee
No abstract text is available yet for this article.
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28474627/scrub-typhus-in-uttarakhand-adjoining-uttar-pradesh-seasonality-clinical-presentations-predictors-of-mortality
#5
Anurag Bhargava, Reshma Kaushik, Rajeev Mohan Kaushik, Anita Sharma, Sohaib Ahmad, Minakshi Dhar, Garima Mittal, Sushant Khanduri, Priyannk Pant, Rajesh Kakkar
BACKGROUND & OBJECTIVES: Scrub typhus is a re-emerging mite-borne rickettsiosis, which continues to be underdiagnosed, with lethal consequences. The present study was conducted to determine the seasonality, clinical presentation and predictors of mortality in patients with scrub typhus at a tertiary care teaching hospital in northern India. METHODS: Scrub typhus was suspected in patients attending the hospital as per the standard case definition and serological evidence was obtained by performing an IgM ELISA...
December 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28474626/abundance-distribution-of-trombiculid-mites-orientia-tsutsugamushi-the-vectors-pathogen-of-scrub-typhus-in-rodents-shrews-collected-from-puducherry-tamil-nadu-india
#6
Sadanandane Candasamy, Elango Ayyanar, Kummankottil Paily, Patricia Anitha Karthikeyan, Agatheswaran Sundararajan, Jambulingam Purushothaman
BACKGROUND & OBJECTIVES: Human cases of scrub typhus are reported every year from Puducherry and adjoining areas in southern India. However, information on the presence of causative agent, Orientia tsutsugamushi, and its vectors is lacking. Hence, the objective of the study was to find out the vector as well as pathogen distribution in rodents and shrews present in the scrub typhus-reported areas in southern India. METHODS: Trombiculid mites were collected by combing rats and shrews collected using Sherman traps and identified to species level following standard taxonomical keys...
December 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28461826/effects-of-clarithromycin-treatment-in-scrub-typhus-in-children-comparison-with-chloramphenicol-and-azithromycin
#7
Min Lee, June Kim, Dae Sun Jo
PURPOSE: Chloramphenicol and tetracycline are not recommended for treating scrub typhus in pediatric patients because of potential side effects, such as aplastic anemia or tooth discoloration. While clarithromycin has recently been used in adults, few reports have been published on its effects in pediatric patients. We report the clinical profiles of pediatric scrub typhus and the effects of clarithromycin on scrub typhus in children. METHODS: We retrospectively analyzed medical records of 56 children with scrub typhus who were admitted between 2004 and 2013 to Chonbuk National University Hospital, Jeonju, Korea...
April 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28449088/clinical-manifestations-of-scrub-typhus
#8
Senaka Rajapakse, Praveen Weeratunga, Sriharan Sivayoganathan, Sumadhya Deepika Fernando
The mite-borne rickettsial zoonosis scrub typhus is widely prevalent in parts of Southeast and Far East Asia, and northern Australia. The disease is an acute febrile illness, associated with rash and often an eschar, which responds dramatically to treatment with antibiotics. In some cases it results in a serious illness leading to multiple organ involvement and death. The disease manifestations are thought to result from a systemic vasculitis, caused by both direct effects of the organisms as well as an exaggerated immune response, although little is understood about its pathogenesis...
February 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28419138/clinical-significance-of-ngal-and-kim-1-for-acute-kidney-injury-in-patients-with-scrub-typhus
#9
In O Sun, Sung Hye Shin, A Young Cho, Hyun Ju Yoon, Mi Yok Chang, Kwang Young Lee
BACKGROUND: The aim of this study is to investigate the clinical significance of neutrophil gelatinase-associated lipocalin (NGAL) and kidney injury molecule-1 (KIM-1) for acute kidney injury (AKI) in patients with scrub typhus. METHODS: From 2014 to 2015, 145 patients were diagnosed with scrub typhus. Of these, we enrolled 138 patients who were followed up until renal recovery or for at least 3 months. We measured serum and urine NGAL and KIM-1 levels and evaluated prognostic factors affecting scrub typhus-associated AKI...
2017: PloS One
https://www.readbyqxmd.com/read/28412201/nitric-oxide-enhanced-the-growth-of-an-obligated-intracellular-bacterium-orientia-tsutsugamushi-in-murine-macrophages
#10
Motohiko Ogawa, Masaaki Satoh, Michiyo Kataoka, Shuji Ando, Masayuki Saijo
Orientia tsutsugamushi is the causative agent of scrub typhus. It is an obligate intracellular bacterium that grows only in eukaryotic cells. Macrophages play an important role in innate immunity by surveilling the human body for pathogens. In present study, it was demonstrated that O. tsutsugamushi propagated well in LPS-activated RAW 264.7 macrophages, but not in non-activated macrophages. In LPS-activated macrophages, the expression of Nos2, which encodes the inducible nitric oxide (NO) synthase (iNOS), was highly upregulated compared to those in non-activated macrophages...
April 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28407761/acute-phase-diagnosis-of-murine-and-scrub-typhus-in-belgian-travelers-by-polymerase-chain-reaction-a-case-report
#11
Caroline Theunissen, Lieselotte Cnops, Marjan Van Esbroeck, Ralph Huits, Emmanuel Bottieau
No abstract text is available yet for this article.
April 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28405985/clinical-profile-and-complications-of-scrub-typhus-hospital-based-study-in-sub-himalayan-region
#12
Ritesh Kumar, Surinder Thakur, Rajesh Bhawani, Anil Kanga, Asha Ranjan
BACKGROUND: Scrub typhus is a documented disease in Himachal Pradesh, but there have been no clinico-epidemiological studies in this area. The present study is done with IgM ELISA as a diagnostic test which has higher sensitivity and specificity as most of previous studies had used Weil Felix test as a diagnostic test. METHODOLOGY: This was a prospective observational study. All the patients more than 18 years of age with positive IgM ELISA for scrub typhus with or without eschar were included...
December 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28386493/dengue-and-scrub-typhus-coinfection-in-a-patient-presenting-with-febrile-illness
#13
Surendra Sapkota, Sudeep Bhandari, Subash Sapkota, Rabin Hamal
Dengue fever and scrub typhus are common causes of acute febrile illness of unclear origin in Asia. Though coinfections of many vector-borne diseases have been described, articles on dengue and scrub typhus coinfection are distinctly limited. In case of coinfection with dengue and scrub typhus, vigilant monitoring of vitals, platelets transfusion, and timely treatment with doxycycline are necessary. High degree of suspicion has to be made for coinfection in a patient presenting with febrile illness with thrombocytopenia and deranged laboratory parameters in postmonsoon season in endemic regions in Asia...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28361787/iap-guidelines-on-rickettsial-diseases-in-children
#14
Narendra Rathi, Atul Kulkarni, Vijay Yewale
OBJECTIVE: To formulate practice guidelines on rickettsial diseases in children for pediatricians across India. JUSTIFICATION: Rickettsial diseases are increasingly being reported from various parts of India. Due to low index of suspicion, nonspecific clinical features in early course of disease, and absence of easily available, sensitive and specific diagnostic tests, these infections are difficult to diagnose. With timely diagnosis, therapy is easy, affordable and often successful...
March 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28356672/scrub-typhus-meningitis-in-a-renal-transplant-recipient
#15
J Dhanapriya, T Dineshkumar, R Sakthirajan, S Murugan, V Jayaprakash, T Balasubramaniyan, N Gopalakrishnan
Scrub typhus is a rickettsial infection commonly seen in Asia. The clinical presentation ranges from nonspecific febrile illness to potentially fatal multiorgan involvement such as liver, kidney, or lung. Central nervous system involvement is uncommon. We report a 45-year-old female renal transplant recipient who presented with fever, headache, meningeal signs, graft dysfunction, and eschar. IgM antibodies against Orientia tsutsugamushi were positive by enzyme-linked immunosorbent assay. Despite oral doxycycline therapy for 5 days, she did not improve but responded well to intravenous azithromycin...
March 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28298367/incidence-risk-factors-and-clinical-outcomes-of-acute-kidney-injury-associated-with-scrub-typhus-a-retrospective-study-of-510-consecutive-patients-in-south-korea-2001-2013
#16
Kyungo Hwang, Ha Nee Jang, Tae Won Lee, Hyun Seop Cho, Eunjin Bae, Se-Ho Chang, Dong Jun Park
OBJECTIVES: Renal involvement in scrub typhus ranges from simple urinary abnormalities to acute kidney injury (AKI) leading to death. This study evaluated the incidence, predictors and prognosis of AKI associated with scrub typhus according to the RIFLE (risk, injury, failure, loss, end-stage kidney disease) criteria. METHODS: We retrospectively evaluated the medical records of patients diagnosed with scrub typhus from January 2001 to November 2013 in Gyeongsang National University Hospital...
March 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/28291501/lateral-flow-rapid-test-for-accurate-and-early-diagnosis-of-scrub-typhus-a-febrile-illness-of-historically-military-importance-in-the-pacific-rim
#17
Chien-Chung Chao, Zhiwen Zhangm, Giulia Weissenberger, Hua-Wei Chen, Wei-Mei Ching
Scrub typhus (ST) is an infection caused by Orientia tsutsugamushi. Historically, ST was ranked as the second most important arthropod-borne medical problem only behind malaria during World War II and the Vietnam War. The disease occurs mainly in Southeast Asia and has been shown to emerge and reemerge in new areas, implying the increased risk for U.S. military and civilian personnel deployed to these regions. ST can effectively be treated by doxycycline provided the diagnosis is made early, before the development of severe complications...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28282373/murine-models-of-scrub-typhus-associated-with-host-control-of-orientia-tsutsugamushi-infection
#18
Nicole L Mendell, Donald H Bouyer, David H Walker
BACKGROUND: Scrub typhus, a febrile illness of substantial incidence and mortality, is caused by infection with the obligately intracellular bacterium Orientia tsutsugamushi. It is estimated that there are more than one million cases annually transmitted by the parasitic larval stage of trombiculid mites in the Asia-Pacific region. The antigenic and genetic diversity of the multiple strains of O. tsutsugamushi hinders the advancement of laboratory diagnosis, development of long-lasting vaccine-induced protection, and interpretation of clinical infection...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28273989/healthcare-associated-infections-in-a-resource-limited-setting
#19
Chanaveerappa Bammigatti, Saikumar Doradla, Harish Narasimha Belgode, Harichandra Kumar, Rathinam Palamalai Swaminathan
INTRODUCTION: Health Care associated Infections (HAI) are the most common complications affecting the hospitalized patients. HAI are more common in developing and under developed countries. However, there are no systematic surveillance programs in these countries. AIM: To find out the burden, predisposing factors and multidrug resistant organisms causing HAI in a resource limited setting. MATERIALS AND METHODS: This prospective observational study was done at Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER)...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28273079/climate-variability-animal-reservoir-and-transmission-of-scrub-typhus-in-southern-china
#20
Yuehong Wei, Yong Huang, Xiaoning Li, Yu Ma, Xia Tao, Xinwei Wu, Zhicong Yang
OBJECTIVES: We aimed to evaluate the relationships between climate variability, animal reservoirs and scrub typhus incidence in Southern China. METHODS: We obtained data on scrub typhus cases in Guangzhou every month from 2006 to 2014 from the Chinese communicable disease network. Time-series Poisson regression models and distributed lag nonlinear models (DLNM) were used to evaluate the relationship between risk factors and scrub typhus. RESULTS: Wavelet analysis found the incidence of scrub typhus cycled with a period of approximately 8-12 months and long-term trends with a period of approximately 24-36 months...
March 2017: PLoS Neglected Tropical Diseases
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