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https://www.readbyqxmd.com/read/28726619/serologic-evidence-of-scrub-typhus-in-the-peruvian-amazon
#1
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
#2
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/28726607/acute-febrile-illness-and-complications-due-to-murine-typhus-texas-usa1-2
#3
Zeeshan Afzal, Sunand Kallumadanda, Feng Wang, Vagish Hemmige, Daniel Musher
Murine typhus occurs relatively commonly in southern Texas, as well as in California. We reviewed records of 90 adults and children in whom murine typhus was diagnosed during a 3-year period in 2 hospitals in southern Texas, USA. Most patients lacked notable comorbidities; all were immunocompetent. Initial signs and symptoms included fever (99%), malaise (82%), headache (77%), fatigue (70%), myalgias (68%), and rash (39%). Complications, often severe, in 28% of patients included bronchiolitis, pneumonia, meningitis, septic shock, cholecystitis, pancreatitis, myositis, and rhabdomyolysis; the last 3 are previously unreported in murine typhus...
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/28722591/serological-evidence-of-rickettsia-spp-in-western-australian-dogs
#6
Mark David Bennett, Mohammad Yazid Abdad, John Stenos
It has been claimed that dogs can be useful sentinels for public health monitoring of vector-borne infectious diseases, including Rickettsia spp. We used 153 canine blood samples opportunistically collected at Murdoch University Veterinary Hospital and 156 canine sera collected from Aboriginal communities in northwest Western Australia to test for evidence of Rickettsia spp. exposure, using microimmunofluorescence (MIF) in the latter case, and both MIF and polymerase chain reaction (PCR) in the former. Conventional and real-time PCR failed to amplify any Rickettsia spp...
June 12, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722576/malaria-associated-mortality-in-the-australian-defence-force-during-the-twentieth-century
#7
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
#8
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/28719297/rickettsia-australis-and-queensland-tick-typhus-a-rickettsial-spotted-fever-group-infection-in-australia
#9
Adam Stewart, Mark Armstrong, Stephen Graves, Krispin Hajkowicz
Rickettsia australis, the etiologic agent of Queensland tick typhus (QTT), is increasingly being recognized as a cause of community-acquired acute febrile illness in eastern Australia. Changing human population demographics, climate change, and increased understanding of expanding vector distribution indicate QTT is an emerging public health threat. This review summarizes the epidemiology, pathogenesis, clinical features, treatment principles, and future directions of this disease. Increased recognition of QTT will enable consideration of and prompt treatment of R...
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
#10
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/28709615/transcriptional-profiling-of-rickettsia-prowazekii-coding-and-non-coding-transcripts-during-in-vitro-host-pathogen-and-vector-pathogen-interactions
#11
Casey L C Schroeder, Hema P Narra, Abha Sahni, Kamil Khanipov, Jignesh Patel, Yuriy Fofanov, Sanjeev K Sahni
Natural pathogen transmission of Rickettsia prowazekii, the etiologic agent of epidemic typhus, to humans is associated with arthropods, including human body lice, ticks, and ectoparasites of eastern flying squirrel. Recently, we have documented the presence of small RNAs in Rickettsia species and expression of R. prowazekii sRNAs during infection of cultured human microvascular endothelial cells (HMECs), which represent the primary target cells during human infections. Bacterial noncoding transcripts are now well established as critical post-transcriptional regulators of virulence and adaptation mechanisms in varying host environments...
June 29, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28694624/neuropsychiatric-manifestations-of-scrub-typhus
#12
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
#13
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
#14
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
#15
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/28652984/direct-evidence-of-rickettsia-typhi-infection-in-rhipicephalus-sanguineus-ticks-and-their-canine-hosts
#16
Karla Dzul-Rosado, Cesar Lugo-Caballero, Raul Tello-Martin, Karina López-Avila, Jorge Zavala-Castro
Murine typhus is a rickettsiosis caused by Rickettsia typhi, whose transmission is carried out by rat fleas in urban settlements as classically known, but it also has been related to cat fleas in a sub-urban alternative cycle that has been suggested by recent reports. These studies remarks that in addition to rats, other animals like cats, opossums and dogs could be implied in the transmission of Rickettsia typhi as infected fleas obtained from serologically positive animals have been detected in samples from endemic areas...
2017: Open veterinary journal
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
#17
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/28616481/evidence-of-exposure-to-rickettsia-felis-in-australian-patients
#18
Yen Thon Teoh, Sze Fui Hii, Stephen Graves, Robert Rees, John Stenos, Rebecca J Traub
Rickettsia felis is an emerging zoonosis, causing flea-borne spotted fever (FBSF). Serological diagnosis is typically confounded by cross-reactivity with typhus group rickettsiae and prior to the development of specific serological methods, cases of FBSF in Australia were misdiagnosed. Patient sera tested between August 2010 and December 2013 and known to be seropositive to R. typhi by immunofluorescence antibody testing (IFAT) were subsequently retested against R. felis using an R. felis-specific IFAT. Sera of 49 patients were of a sufficient quality to be included in re-analysis...
December 2016: One Health
https://www.readbyqxmd.com/read/28612320/scrub-typhus-causing-neonatal-hepatitis-with-acute-liver-failure-a-case-series
#19
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
#20
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
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