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Scrub typhus

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https://www.readbyqxmd.com/read/28742087/type-1-skewed-neuroinflammation-and-vascular-damage-associated-with-orientia-tsutsugamushi-infection-in-mice
#1
Lynn Soong, HeThomas R Shelite, Yan Xing, Harica Kodakandla, Yuejin Liang, Brandon J Trent, Paulina Horton, Kathryn C Smith, Zhenyang Zhao, Jiaren Sun, Donald H Bouyer, Jiyang Cai
BACKGROUND: Scrub typhus is a life-threatening disease, due to infection with O. tsutsugamushi, a Gram-negative bacterium that preferentially replicates in endothelial cells and professional phagocytes. Meningoencephalitis has been reported in scrub typhus patients and experimentally-infected animals; however, the neurological manifestation and its underlying mechanisms remain poorly understood. To address this issue, we focused on Orientia tsutsugamushi Karp strain (OtK), and examined host responses in the brain during lethal versus self-healing scrub typhus disease in our newly established murine models...
July 24, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28726619/serologic-evidence-of-scrub-typhus-in-the-peruvian-amazon
#2
Claudine Kocher, Ju Jiang, Amy C Morrison, Roger Castillo, Mariana Leguia, Steev Loyola, Julia S Ampuero, Manuel Cespedes, Eric S Halsey, Daniel G Bausch, Allen L Richards
Using a large, passive, febrile surveillance program in Iquitos, Peru, we retrospectively tested human blood specimens for scrub typhus group orientiae by ELISA, immunofluorescence assay, and PCR. Of 1,124 participants, 60 (5.3%) were seropositive, and 1 showed evidence of recent active infection. Our serologic data indicate that scrub typhus is present in the Peruvian Amazon.
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28726617/scrub-typhus-as-a-cause-of-acute-encephalitis-syndrome-gorakhpur-uttar-pradesh-india
#3
Mahima Mittal, Jeromie Wesley Vivian Thangaraj, Winsley Rose, Valsan Philip Verghese, C P Girish Kumar, Mahim Mittal, R Sabarinathan, Vijay Bondre, Nivedita Gupta, Manoj V Murhekar
Outbreaks of acute encephalitis syndrome (AES) have been occurring in Gorakhpur Division, Uttar Pradesh, India, for several years. In 2016, we conducted a case-control study. Our findings revealed a high proportion of AES cases with Orientia tsutsugamushi IgM and IgG, indicating that scrub typhus is a cause of AES.
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28726604/scrub-typhus-outbreak-in-a-remote-primary-school-bhutan-2014
#4
Tshokey Tshokey, Stephen Graves, Dorji Tshering, Kelzang Phuntsho, Karchung Tshering, John Stenos
Scrub typhus in Bhutan was first reported in 2009. We investigated an outbreak of scrub typhus in a remote primary school during August-October 2014. Delay in recognition and treatment resulted in 2 deaths from meningoencephalitis. Scrub typhus warrants urgent public health interventions in Bhutan.
August 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28723951/cd8-t-cells-provide-immune-protection-against-murine-disseminated-endotheliotropic-orientia-tsutsugamushi-infection
#5
Guang Xu, Nicole L Mendell, Yuejin Liang, Thomas R Shelite, Yenny Goez-Rivillas, Lynn Soong, Donald H Bouyer, David H Walker
Scrub typhus, caused by a Gram-negative obligately intracellular coccobacillus, Orientia tsutsugamushi, is a long neglected but important tropical disease. Orientia tsutsugamushi causes illness in one million people each year, and 1 billion people are at risk. Without appropriate diagnosis and treatment, the disease can cause severe multiorgan failure with a case fatality rate of 7-15%. The current gaps in knowledge of immunity include the unknown mechanisms of host immunity to O. tsutsugamushi. Using an intravenous (i...
July 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28722576/malaria-associated-mortality-in-the-australian-defence-force-during-the-twentieth-century
#6
G Dennis Shanks
Malaria has been a military problem throughout history capable of causing epidemics that stop military operations. Individual mortality was examined from records of the three major wars of the 20th century that involved Australia in which 133 (1914-1919), 92 (1943-1945), and two (1965-1967) soldiers are known to have died with malaria. Those dying were predominately enlisted soldiers with a mean age of 29 years often complicated by other infections such as influenza pneumonia or scrub typhus. Lethal epidemics of falciparum malaria occurred in Palestine/Syria in October 1918 and New Guinea in September 1943 to March 1944...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719308/a-recombinant-47-kda-outer-membrane-protein-induces-an-immune-response-against-orientia-tsutsugamushi-strain-boryong
#7
Sangho Choi, Hang Jin Jeong, Kyu-Jam Hwang, Byoungchul Gill, Young Ran Ju, Yeong Seon Lee, Jeongmin Lee
We investigated the 47-kDa outer membrane protein (OMP), which is a periplasmic serine protease and an antigenic major surface protein of Orientia tsutsugamushi, as a vaccine candidate. We developed a conventional subunit vaccine expressing recombinant 47-kDa OMP (rec47) and a DNA vaccine (p47). In mouse immunization experiments, intranasal immunization with rec47 alone or with rec47 plus heat-labile enterotoxin B subunit from Escherichia coli or plus cholera toxin (CT) as adjuvants induced a higher amount of rec47-specific antibodies than intramuscular immunization with p47 alone or with p47 plus pBOOST2-samIRF7/3 (pB) as adjuvant...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28709838/characteristics-of-scrub-typhus-murine-typhus-and-q-fever-among-elderly-patients-prolonged-prothrombin-time-as-a-predictor-for-severity
#8
Ko Chang, Nan-Yao Lee, Wen-Chien Ko, Wei-Ru Lin, Yen-Hsu Chen, Jih-Jin Tsai, Tun-Chieh Chen, Chun-Yu Lin, Ya-Ting Chang, Po-Liang Lu
BACKGROUND/PURPOSE: The clinical manifestations of scrub typhus, murine typhus and acute Q fever in the elderly are not clear. METHODS: We conducted a retrospective study to identify the characteristics of the elderly aged ≥65 years with a comparison group aged 18-64 years among patients with scrub typhus, murine typhus, or acute Q fever who were serologically confirmed at three hospitals in Taiwan during 2002-2011. RESULTS: Among 441 cases, including 187 cases of scrub typhus, 166 acute Q fever, and 88 murine typhus, 68 (15...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28694624/neuropsychiatric-manifestations-of-scrub-typhus
#9
REVIEW
Sanjay K Mahajan, Sanyam K Mahajan
Scrub typhus is caused by Orientia tsutsugamushi characterized by focal or disseminated vasculitis and perivasculitis which may involve the lungs, heart, liver, spleen and central nervous system. It was thought to have been eradicated from India. Recently it is being reported from many areas of India. The clinical picture and severity of the symptoms varies widely. The neurological manifestations of scrub typhus are not uncommon but are diverse. Meningoencephalitis is classical manifestation of scrub typhus but cerebellitis, cranial nerve palsies, plexopathy, transverse myelitis, neuroleptic malignant syndrome and Guillan-Barré syndrome are other manifestations reported in literature...
July 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28679481/activation-of-the-coagulation-cascade-in-patients-with-scrub-typhus
#10
Hee-Jeong Lee, Chi-Young Park, Sang-Gon Park, Na-Ra Yoon, Dong-Min Kim, Choon-Hae Chung
This retrospective study aimed to evaluate the levels of coagulation factors and presence of disseminated intravascular coagulation (DIC) in patients with scrub typhus. We included patients confirmed to have scrub typhus at the Chosun University Hospital between September 2004 and December 2009. The DIC scores were evaluated in 365 patients and 36 healthy controls. The median concentrations of fibrinogen, d-dimer, and fibrin/fibrinogen degradation products (FDP) were compared between patients and healthy controls (p<0...
June 19, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28674823/comparison-of-scrub-typhus-with-and-without-meningitis
#11
Winsley Rose, Urmi Ghosh, Anu Punnen, Rajiv Sarkar, John Jude Antony Prakash, Valsan Philip Verghese
OBJECTIVE: To compare the children admitted with scrub typhus with and without meningitis. METHODS: All children admitted with scrub typhus over a 62 mo period were reviewed. Statistical analysis was performed to compare those with and without meningitis for demographic, clinical, investigations and outcome parameters. RESULTS: Four hundred twenty seven children were admitted with scrub typhus and 63 (14.8%) had meningitis. The mean cerebrospinal fluid white blood cell (CSF WBC) count was 71 cells/cu...
July 4, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28663682/hepatitis-e-virus-induced-acute-liver-failure-with-scrub-typhus-coinfection-in-a-pregnant-woman
#12
Nipun Verma, Megha Sharma, Manisha Biswal, Sunil Taneja, Nitya Batra, Abhay Kumar, Radha K Dhiman
Coinfections contribute significantly to diagnostic challenges of acute febrile illnesses, especially in endemic areas. The confusion caused by overlapping clinical features impedes timely management. Herein, we report an unusual, previously unreported case of a pregnant woman suffering from a coinfection of scrub typhus and hepatitis E virus. A 25-year-old, 31-week pregnant woman presented with jaundice for 5 days and altered sensorium for 2 days. She had features of both viral acute liver failure (ALF) and tropical infections mimicking ALF, including hyperbilirubinemia, coagulopathy, anemia, thrombocytopenia, intravascular hemolysis, and hepatosplenomegaly...
June 2017: Journal of Clinical and Experimental Hepatology
https://www.readbyqxmd.com/read/28652214/elevated-levels-of-von-willebrand-factor-and-high-mobility-group-box-1-hmgb1-are-associated-with-disease-severity-and-clinical-outcome-of-scrub-typhus
#13
Hongliu Chen, Zong Ning, Ying Qiu, Yuanli Liao, Haihua Chang, Yuanyuan Ai, Yinghua Wei, Yiming Deng, Ying Shen
OBJECTIVES: This study aimed to investigate whether von Willebrand factor (vWF) and high mobility group box 1 (HMGB1) are associated with the severity and clinical outcome of scrub typhus and to seek novel biomarkers for surveillance and prediction of the prognosis of this infection. METHODS: Serum concentrations of vWF and HMGB1 were measured twice by ELISA for scrub typhus patients (n=103), once prior to doxycycline therapy and then on day 7 of doxycycline therapy; concentrations were measured once for healthy controls (n=32)...
June 23, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28612320/scrub-typhus-causing-neonatal-hepatitis-with-acute-liver-failure-a-case-series
#14
Shailja Vajpayee, R K Gupta, M L Gupta
Neonatal hepatitis with acute liver failure due to varied etiology including various infections is reported in the past. Scrub typhus as a cause of neonatal hepatitis has rarely been reported in literature. A high index of clinical suspicion is required for early diagnosis and timely treatment. Severity and prognosis of the disease varies widely because several different strains of Orientia tsutsugamushi exist with different virulence. Delayed diagnosis can result in complication and significant morbidity and mortality...
June 14, 2017: Indian Journal of Gastroenterology: Official Journal of the Indian Society of Gastroenterology
https://www.readbyqxmd.com/read/28607239/scrub-typhus-in-bhutan-a-synthesis-of-data-from-2009-to-2014
#15
REVIEW
Tshokey Tshokey, Tashi Choden, Ragunath Sharma
Scrub typhus is an acute, febrile illness, caused by the bacterium Orientia tsutsugamushi, that affects millions annually in the endemic Asia-Pacific region. In untreated cases, the case-fatality rates range from 6% to 35%. In Bhutan, there was a probable outbreak in Gedu in 2009, which resulted in heightened awareness of the disease. Nevertheless, information on scrub typhus in Bhutan is limited and scattered and the epidemiology has yet to be established. To report the current picture of scrub typhus in Bhutan, this review gathered data from scholarly databases, surveillance reports, the Annual health bulletin, research publications and laboratory test reports from hospitals...
September 2016: WHO South-East Asia Journal of Public Health
https://www.readbyqxmd.com/read/28604564/acute-cerebellitis-in-a-child-with-scrub-typhus
#16
Siyaram Didel, Aseem Basha M, Manisha Biswal, Renu Suthar, Naveen Sankhyan
No abstract text is available yet for this article.
July 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28601091/an-elisa-assay-using-a-combination-of-recombinant-proteins-from-multiple-strains-of-orientia-tsutsugamushi-offers-an-accurate-diagnosis-for-scrub-typhus
#17
Chien-Chung Chao, Zhiwen Zhang, Tatyana Belinskaya, Wilawan Thipmontree, Wiwit Tantibhedyangkul, Saowaluk Silpasakorn, Ekkarat Wongsawat, Yupin Suputtamongkol, Wei-Mei Ching
BACKGROUND: Scrub typhus (ST) is a disease caused by an obligate intracellular bacterium, Orientia tsutsugamushi, an organism that requires a BSL3 laboratory for propagation. The disease is hallmarked by an eschar at the site of the chigger bite, followed by the development of fever, malaise, myalgia, anorexia, and papulomacular rash. Indirect immunofluorescent assay (IFA) is the gold standard for scrub typhus diagnosis, however, the subjectivity of the assay, the need for a specialized laboratory and instruments has limited the wide use of the test in resource limited areas...
June 10, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28584437/severe-pediatric-acute-respiratory-distress-syndrome-due-to-scrub-typhus-successful-ventilation-with-airway-pressure-release-ventilation-mode-after-becoming-refractory-to-protective-ventilation
#18
Sudha Chandelia, Sarika Jain
Scrub typhus can affect lungs from mild illness like pneumonitis to a severe illness like acute respiratory distress syndrome (ARDS). Such patients may be very challenging to treat when their hypoxemia becomes severe and refractory to treatment. Main treatment is supportive in terms of mechanical ventilation. In adult ARDS, low tidal volume (TV) ventilation has been recommended, but there is no consensus on most effective ventilation mode in children. We present a case of a 12-year-old girl who developed severe ARDS (PO2/FiO2 ratio - 58), refractory to low TV ventilation...
May 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28531311/the-genotypes-of-orientia-tsutsugamushi-identified-in-scrub-typhus-patients-in-northern-vietnam
#19
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%)...
March 1, 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
#20
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
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