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https://www.readbyqxmd.com/read/28802854/use-of-axenic-media-to-determine-antibiotic-efficacy-against-coxiella-burnetii
#1
K A Clay, M G Hartley, P Russell, I H Norville
The traditional methods of measuring minimum inhibitory concentration (MIC) of antibiotics against Coxiella burnetii are time consuming and technically difficult. The discovery of axenic media for C. burnetii culture provided an opportunity to determine the feasibility of using both broth dilution and an antimicrobial gradient method (E-test) as a convenient method of measuring MICs. The MIC for a range of antibiotics that have proven or potential use in the treatment of Q-fever, namely doxycycline, ciprofloxacin, levofloxacin, moxifloxacin, co-trimoxazole, were measured...
August 9, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28800156/quantitative-dextran-trafficking-to-the-coxiella-burnetii-parasitophorous-vacuole
#2
Seth Winfree, Stacey D Gilk
The gram-negative bacterium Coxiella burnetii causes human Q fever, a disease characterized by a debilitating flu-like illness in acute cases and endocarditis in chronic patients. An obligate intracellular pathogen, Coxiella burnetii survives within a large, lysosome-like vacuole inside the host cell. A unique feature of the Coxiella parasitophorous vacuole (PV) is high levels of fusion with the host endocytic pathway, with PV-endosome fusion critical for Coxiella survival within the host cell. This unit describes quantitating PV-endosome fusion by measuring delivery of the fluid phase endosome marker dextran to the PV using live cell imaging...
August 11, 2017: Current Protocols in Microbiology
https://www.readbyqxmd.com/read/28793883/cxcl9-a-promising-biomarker-in-the-diagnosis-of-chronic-q-fever
#3
Anne F M Jansen, Teske Schoffelen, Julien Textoris, Jean-Louis Mege, Marrigje Nabuurs-Franssen, Ruud P H Raijmakers, Mihai G Netea, Leo A B Joosten, Chantal P Bleeker-Rovers, Marcel van Deuren
BACKGROUND: In the aftermath of the largest Q fever outbreak in the world, diagnosing the potentially lethal complication chronic Q fever remains challenging. PCR, Coxiella burnetii IgG phase I antibodies, CRP and (18)F-FDG-PET/CT scan are used for diagnosis and monitoring in clinical practice. We aimed to identify and test biomarkers in order to improve discriminative power of the diagnostic tests and monitoring of chronic Q fever. METHODS: We performed a transcriptome analysis on C...
August 9, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28774674/concurrent-hepatic-tuberculosis-and-hepatic-graft-versus-host-disease-in-an-allogeneic-hematopoietic-stem-cell-transplant-recipient-a-case-report
#4
Z Zhao, W Q Leow
BACKGROUND: Infection and graft-versus-host disease (GVHD) are among the most common complications after hematopoietic stem cell transplantation (HSCT). With well-known risk factors including allogeneic HSCT and GVHD, tuberculosis (TB) has a higher incidence and shorter survival rate in HSCT recipients than in the general population. CASE REPORT: A 55-year-old Indonesian female with a history of latent TB was found to have acute myeloid leukemia 3 months after allogeneic HSCT...
July 31, 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28759337/detection-of-coxiella-burnetii-dna-in-peridomestic-and-wild-animals-and-ticks-in-an-endemic-region-canary-islands-spain
#5
Margarita Bolaños-Rivero, Cristina Carranza-Rodríguez, Noe F Rodríguez, Carlos Gutiérrez, José-Luis Pérez-Arellano
Coxiella burnetii, the etiological agent of human Q fever, can infect mammals, birds, and arthropods. The Canary Islands (Spain) are considered an endemic territory, with a high prevalence in both humans and livestock. Nonetheless, there is no epidemiological information about the wild and peridomestic cycles of C. burnetii. Tissue samples from rodents on farms (100) and wild rabbits (129) were collected and assessed by PCR to detect C. burnetii DNA. In parallel, ticks were also collected from vegetation (1169), livestock (335), domestic dogs (169), and wild animals (65)...
July 31, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28748879/early-clinical-manifestations-and-laboratory-findings-before-and-after-treatment-of-cytomegalovirus-infection-in-kidney-transplant-patients
#6
Wasim Ahmed Siddiqui, Issa Al Salmi, Amitabh Jha, Abbas Pakkyara, Mohammad Yasir, Faissal A M Shaheen
Cytomegalovirus (CMV) is one of the most frequently encountered opportunistic viral pathogens in kidney transplant recipients. In this study, we retrospectively reviewed all living related and unrelated kidney transplant recipients on regular follow-up from January 2006 to June 2015, who were suspected to have CMV clinically and confirmed by DNA polymerase chain reaction (PCR). CMV PCR was detected in 102 kidney transplant recipients. The median time of detection after kidney transplant was 21 months, ranging from 15 days to 84 months...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28748837/the-seroprevalence-of-coxiella-burnetii-in-erzincan-turkey-identification-of-the-risk-factors-and-their-relationship-with-geographical-features
#7
Aytekin Cikman, Merve Aydin, Baris Gulhan, Faruk Karakecili, Adalet Ozcicek, Ozan Arif Kesik, Mehmet Parlak, Fatih Ozcelik, Bilge Gültepe
BACKGROUND & OBJECTIVES: Coxiella burnetii (C. burnetii) bacterium, the causative agent of Q fever has regained importance due to the increasing cases of infections and outbreaks. A cross-sectional descriptive study was conducted to investigate the seroprevalence of C. burnetii in human populations of Erzincan province located in the eastern Turkey, identify the risk factors, and to explore the relationship between geographical features. METHODS: A total of 368 people residing in the rural (306) and urban (62) areas of the province were included in the study...
April 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/28739619/q-fever-prosthetic-joint-infection
#8
Scott Weisenberg, David Perlada, Thomas Peatman
Coxiella burnetii is the causative pathogen of the zoonotic infection Q fever. Most patients with Q fever experience a non-specific febrile illness, hepatitis or pneumonia. Q fever has recently been described as a cause of prosthetic joint septic arthritis, but remains very uncommonly reported. We present a case of Q fever prosthetic joint septic arthritis that has responded to a combination of two-stage surgical exchange and prolonged medical treatment with doxycycline and hydroxychloroquine.
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28733024/ecohealth-research-in-africa-where-from-where-to
#9
EDITORIAL
Robert Bergquist, Norbert W Brattig, Moses J Chimbari, Jakob Zinsstag, Jürg Utzinger
Epidemiological mapping and risk profiling build on the idea that diseases are tied to social-ecological systems that govern the distribution and abundance of transmissible pathogens, vectors and hosts. This is the heart of the emerging field of ecohealth, which examines how biological, cultural, demographic, economic, physical, political and social environments change can affect the health and wellbeing of humans, animals and ecosystems and the services they provide. This paper is an overview of a special issue of Acta Tropica, whose 15 publications reflect a geographically and epidemiologically diverse landscape of ecohealth in Africa...
July 18, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28723794/thrombosis-and-antiphospholipid-antibody-syndrome-during-acute-q-fever-a-cross-sectional-study
#10
Matthieu Million, Nathalie Bardin, Simon Bessis, Nadia Nouiakh, Charlaine Douliery, Sophie Edouard, Emmanouil Angelakis, Annick Bosseray, Olivier Epaulard, Stéphanie Branger, Bernard Chaudier, Karine Blanc-Laserre, Nicole Ferreira-Maldent, Elisa Demonchy, France Roblot, Jacques Reynes, Felix Djossou, Camelia Protopopescu, Patrizia Carrieri, Laurence Camoin-Jau, Jean-Louis Mege, Didier Raoult
Q fever is a neglected and potentially fatal disease. During acute Q fever, antiphospholipid antibodies are very prevalent and have been associated with fever, thrombocytopenia, acquired heart valve disease, and progression to chronic endocarditis. However, thrombosis, the main clinical criterion of the 2006 updated classification of the antiphospholipid syndrome, has not been assessed in this context. To test whether thrombosis is associated with antiphospholipid antibodies and whether the criteria for antiphospholipid syndrome can be met in patients with acute Q fever, we conducted a cross-sectional study at the French National Referral Center for Q fever...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28722568/epidemiology-of-spotted-fever-group-rickettsioses-and-acute-undifferentiated-febrile-illness-in-villeta-colombia
#11
Álvaro A Faccini-Martínez, Alejandro Ramírez-Hernández, Christian Barreto, Elkin Forero-Becerra, Diego Millán, Elkin Valbuena, Andrea C Sánchez-Alfonso, Wilson O Imbacuán-Pantoja, Jesús A Cortés-Vecino, Luis J Polo-Terán, Néstor Yaya-Lancheros, Jorge Jácome, Ana M Palomar, Sonia Santibáñez, Aránzazu Portillo, José A Oteo, Marylin Hidalgo
Etiology of acute undifferentiated febrile syndrome (AUFS) is often unknown, leading to inaccurate diagnosis and treatment. Villeta town has been identified as an endemic area for spotted fever group (SFG) rickettsioses but little is known about possible amplifier hosts and other Rickettsia species different from Rickettsia rickettsii. Besides, few studies have approached other AUFS etiologies in the region. We investigated the role of dengue, leptospirosis, rickettsioses, human anaplasmosis, and Q fever as possible causes of AUFS in patients from Villeta...
June 19, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28720048/mesangial-proliferative-lupus-nephritis-with-podocytopathy-a-special-entity-of-lupus-nephritis
#12
S F Wang, Y H Chen, D Q Chen, Z Z Liu, F Xu, C H Zeng, W X Hu
Mesangial proliferative lupus nephritis may coexist with podocytopathy, but its clinical-morphological features, treatment response and outcomes have not been compared with mesangial proliferative lupus nephritis without podocytopathy. In this study, 125 biopsies of lupus nephritis patients showing mesangial proliferation with mesangial immune deposits were collected and divided into podocytopathy group (defined as podocyte foot process effacement (FPE) >50% with nephrotic syndrome (NS)) and mesangial group (FPE ≤50%, or FPE >50% without NS)...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28715899/the-clinical-challenge-of-chronic-q-fever-with-isolated-liver-involvement
#13
Armando Peixoto, Pedro Pereira, Guilherme Macedo
Chronic Q fever is defined as an infection by Coxiella burnetii (C. burnetii) that lasts for six months or more. It occurs in 1-5% of individuals infected with this agent and develops over a period of months to years after the acute infection. Cases of hepatic involvement are rare.
August 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28714925/individual-and-interactive-effects-of-socio-ecological-factors-on-dengue-fever-at-fine-spatial-scale-a-geographical-detector-based-analysis
#14
Zheng Cao, Tao Liu, Xing Li, Jin Wang, Hualiang Lin, Lingling Chen, Zhifeng Wu, Wenjun Ma
Background: Large spatial heterogeneity was observed in the dengue fever outbreak in Guangzhou in 2014, however, the underlying reasons remain unknown. We examined whether socio-ecological factors affected the spatial distribution and their interactive effects. Methods: Moran's I was applied to first examine the spatial cluster of dengue fever in Guangzhou. Nine socio-ecological factors were chosen to represent the urbanization level, economy, accessibility, environment, and the weather of the 167 townships/streets in Guangzhou, and then the geographical detector was applied to analyze the individual and interactive effects of these factors on the dengue outbreak...
July 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28712416/biopsychosocial-risk-factors-of-persistent-fatigue-after-acute-infection-a-systematic-review-to-inform-interventions
#15
REVIEW
Katrin Hulme, Joanna L Hudson, Philine Rojczyk, Paul Little, Rona Moss-Morris
OBJECTIVES: Fatigue is a prevalent and debilitating symptom, preceded by an acute infectious episode in some patients. This systematic review aimed to identify risk factors for the development of persistent fatigue after an acute infection, to develop an evidence-based working model of post-infectious fatigue. METHODS: Electronic databases (Medline, PsycINFO and EMBASE) were searched, from inception to March 2016, for studies which investigated biopsychosocial risk factors of on-going fatigue after an acute infection...
August 2017: Journal of Psychosomatic Research
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
#16
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/28706879/multiple-substrate-usage-of-coxiella-burnetii-to-feed-a-bipartite-metabolic-network
#17
Ina Häuslein, Franck Cantet, Sarah Reschke, Fan Chen, Matteo Bonazzi, Wolfgang Eisenreich
The human pathogen Coxiella burnetii causes Q-fever and is classified as a category B bio-weapon. Exploiting the development of the axenic growth medium ACCM-2, we have now used (13)C-labeling experiments and isotopolog profiling to investigate the highly diverse metabolic network of C. burnetii. To this aim, C. burnetii RSA 439 NMII was cultured in ACCM-2 containing 5 mM of either [U-(13)C3]serine, [U-(13)C6]glucose, or [U-(13)C3]glycerol until the late-logarithmic phase. GC/MS-based isotopolog profiling of protein-derived amino acids, methanol-soluble polar metabolites, fatty acids, and cell wall components (e...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28698491/microrna-signature-of-human-microvascular-endothelium-infected-with-rickettsia-rickettsii
#18
Abha Sahni, Hema P Narra, Jignesh Patel, Sanjeev K Sahni
MicroRNAs (miRNAs) mediate gene silencing by destabilization and/or translational repression of target mRNA. Infection of human microvascular endothelial cells as primary targets of Rickettsiarickettsii, the etiologic agent of Rocky Mountain spotted fever, triggers host responses appertaining to alterations in cellular gene expression. Microarray-based profiling of endothelial cells infected with R.rickettsii for 3 or 24 h revealed differential expression of 33 miRNAs, of which miRNAs129-5p, 200a-3p, 297, 200b-3p, and 595 were identified as the top five up-regulated miRNAs (5 to 20-fold, p ≤ 0...
July 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28681721/dot-map-cartograms-for-detection-of-infectious-disease-outbreaks-an-application-to-q-fever-the-netherlands-and-pertussis-germany
#19
Loes Soetens, Susan Hahné, Jacco Wallinga
Geographical mapping of infectious diseases is an important tool for detecting and characterising outbreaks. Two common mapping methods, dot maps and incidence maps, have important shortcomings. The former does not represent population density and can compromise case privacy, and the latter relies on pre-defined administrative boundaries. We propose a method that overcomes these limitations: dot map cartograms. These create a point pattern of cases while reshaping spatial units, such that spatial area becomes proportional to population size...
June 29, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28673687/-weight-loss-fever-and-arthralgia-in-a-43-year-old-man-treated-for-follicular-lymphoma
#20
M Vandeputte, B Couturier, F Vandergheynst, M Maerevoet, M-L Jullie, A Kolivras, Q Fontanges, L Verset, J André, E Cogan, H Boysson
No abstract text is available yet for this article.
June 30, 2017: La Revue de Médecine Interne
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