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https://www.readbyqxmd.com/read/28732006/drivers-for-rift-valley-fever-emergence-in-mayotte-a-bayesian-modelling-approach
#1
Raphaëlle Métras, Guillaume Fournié, Laure Dommergues, Anton Camacho, Lisa Cavalerie, Philippe Mérot, Matt J Keeling, Catherine Cêtre-Sossah, Eric Cardinale, W John Edmunds
Rift Valley fever (RVF) is a major zoonotic and arboviral hemorrhagic fever. The conditions leading to RVF epidemics are still unclear, and the relative role of climatic and anthropogenic factors may vary between ecosystems. Here, we estimate the most likely scenario that led to RVF emergence on the island of Mayotte, following the 2006-2007 African epidemic. We developed the first mathematical model for RVF that accounts for climate, animal imports and livestock susceptibility, which is fitted to a 12-years dataset...
July 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28719317/climate-influence-on-emerging-risk-areas-for-rift-valley-fever-epidemics-in-tanzania
#2
Clement N Mweya, Leonard E G Mboera, Sharadhuli I Kimera
Rift Valley Fever (RVF) is a climate-related arboviral infection of animals and humans. Climate is thought to represent a threat toward emerging risk areas for RVF epidemics globally. The objective of this study was to evaluate influence of climate on distribution of suitable breeding habitats for Culex pipiens complex, potential mosquito vector responsible for transmission and distribution of disease epidemics risk areas in Tanzania. We used ecological niche models to estimate potential distribution of disease risk areas based on vectors and disease co-occurrence data approach...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28710814/inter-epidemic-rift-valley-fever-virus-seroconversions-in-an-irrigation-scheme-in-bura-south-east-kenya
#3
D Mbotha, B Bett, S Kairu-Wanyoike, D Grace, A Kihara, M Wainaina, A Hoppenheit, P-H Clausen, J Lindahl
Rift Valley fever (RVF) is an acute mosquito-borne viral zoonosis whose outbreaks are often associated with prolonged rainfall and flooding, during which large numbers of vectors emerge. Recent studies into the inter-epidemic maintenance of RVF virus (RVFV) suggest that both vertical transmission in vectors and direct transmission between hosts act in combination with predisposing factors for persistence of the virus. A comparative longitudinal survey was carried out in Tana River County, Kenya, in irrigated, riverine and pastoral ecosystems from September 2014-June 2015...
July 14, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28693302/packaging-of-rvfv-pseudoviruses-and-establishment-of-a-neutralization-assay-method
#4
Yuetao Li, Yongkun Zhao, Cuiling Wang, Xuexing Zheng, Hualei Wang, Weiwei Gai, Hongli Jin, Feihu Yan, Boning Qiu, Yuwei Gao, Nan Li, Songtao Yang, Xianzhu Xia
Rift Valley fever (RVF) is an acute, febrile zoonotic disease that is caused by the RVF virus (RVFV). RVF is mainly prevalent on the Arabian Peninsula, the African continent, and several islands in the Indian Ocean near southeast Africa. RVFV has been classified by the World Organisation for Animal Health (OIE) as a category A pathogen. To avoid the biological safety concerns associated with use of the pathogen in RVFV neutralization assays, the present study explored and established an RVFV pseudovirus-based neutralization assay...
July 10, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28643206/right-visual-field-advantage-in-the-attentional-blink-asymmetry-in-attentional-gating-across-time-and-space
#5
Dafna Bergerbest, Orit Shilkrot, Michal Joseph, Moti Salti
When two targets are presented in a rapid serial visual presentation (RSVP), recognition of the second target (T2) is usually reduced when presented 150-500 ms after the first target, demonstrating an attentional blink (AB). Previous studies have shown a left visual-field (LVF) advantage in T2 recognition, when T2 was embedded in one of two streams, demanding top-down attention for its recognition. Here, we explored the impact of bottom-up saliency on spatial asymmetry in the AB. When T2 was spatially shifted outside from the RSVP, creating an abrupt onset of T2, right T2s showed a right visual-field (RVF) advantage...
June 22, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28638845/detection-of-the-northeastern-african-rift-valley-fever-virus-lineage-during-the-2015-outbreak-in-mauritania
#6
Ndeye Sakha Bob, Hampâté Bâ, Gamou Fall, Elkhalil Ishagh, Mamadou Y Diallo, Abdourahmane Sow, Pape Mbacké Sembene, Ousmane Faye, Brahim El Kouri, Mohamed Lemine Sidi, Amadou Alpha Sall
BACKGROUND: Rift Valley fever (RVF) is an acute viral anthropozoonosis that causes epizootics and epidemics among livestock population and humans. Multiple emergences and reemergences of the virus have occurred in Mauritania over the last decade. This article describes the outbreak that occurred in 2015 in Mauritania and reports the results of serological and molecular investigations of blood samples collected from suspected RVF patients. METHODS: An RVF outbreak was reported from 14 September to 26 November 2015 in Mauritania...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28628000/epigenetics-inflammation-and-metabolism-in-right-heart-failure-associated-with-pulmonary-hypertension
#7
Nolwenn Samson, Roxane Paulin
Right ventricular failure (RVF) is the most important prognostic factor for both morbidity and mortality in pulmonary arterial hypertension (PAH), but also occurs in numerous other common diseases and conditions, including left ventricle dysfunction. RVF remains understudied compared with left ventricular failure (LVF). However, right and left ventricles have many differences at the morphological level or the embryologic origin, and respond differently to pressure overload. Therefore, knowledge from the left ventricle cannot be extrapolated to the right ventricle...
June 19, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28624593/double-sequential-defibrillation-therapy-for-out-of-hospital-cardiac-arrests-the-london-experience
#8
Amber C Emmerson, Mark Whitbread, Rachael T Fothergill
BACKGROUND: Despite advances in treatment for out-of-hospital cardiac arrest (OHCA), a subgroup of patients remain in refractory ventricular fibrillation (RVF) during resuscitation. Recent evidence suggests that double sequential defibrillation (DSD), where two shocks are delivered to the patient in quick succession, may provide an effective therapy for RVF. This study describes the characteristics and survival outcomes of OHCA patients treated by ambulance clinicians using a local DSD protocol in an attempt to resolve RVF...
August 2017: Resuscitation
https://www.readbyqxmd.com/read/28616499/emergence-of-wesselsbron-virus-among-black-rat-and-humans-in-eastern-senegal-in-2013
#9
Moussa M Diagne, Martin Faye, Oumar Faye, Abdourahmane Sow, Fanny Balique, Mbacké Sembène, Laurent Granjon, Pascal Handschumacher, Ousmane Faye, Mawlouth Diallo, Amadou A Sall
Wesselsbron disease is a neglected mosquito transmitted Flavivirus infection that causes abortions and has teratogenic effects on sheep and cattle in Africa. Human can also be infected. The detection of human or animal cases is complicated by the non-specific symptoms close to Rift Valley Fever (RVF) in domestic livestock species or Dengue like syndrome in humans. Then, these detections are usually made during RVF investigations in sheep. These domestic animals should take a role in the life cycle of the virus but some evidences of Wesselsbron virus (WSLV) presence in wild animals suggest that the latter may be involved in the virus maintenance in nature...
June 2017: One Health
https://www.readbyqxmd.com/read/28587703/make-it-two-a-case-report-of-dual-sequential-external-defibrillation
#10
Colin R Bell, Adam Szulewski, Steven C Brooks
Dual sequential external defibrillation (DSED) is the process of near simultaneous discharge of two defibrillators with differing pad placement to terminate refractory arrhythmias. Previously used in the electrophysiology suite, this technique has recently been used in the emergency department and prehospital setting for out-of-hospital cardiac arrest (OHCA). We present a case of successful DSED in the emergency department with neurologically intact survival to hospital discharge after refractory ventricular fibrillation (RVF) and review the putative mechanisms of action of this technique...
June 7, 2017: CJEM
https://www.readbyqxmd.com/read/28584173/spatial-seasonal-and-climatic-predictive-models-of-rift-valley-fever-disease-across-africa
#11
David W Redding, Sonia Tiedt, Gianni Lo Iacono, Bernard Bett, Kate E Jones
Understanding the emergence and subsequent spread of human infectious diseases is a critical global challenge, especially for high-impact zoonotic and vector-borne diseases. Global climate and land-use change are likely to alter host and vector distributions, but understanding the impact of these changes on the burden of infectious diseases is difficult. Here, we use a Bayesian spatial model to investigate environmental drivers of one of the most important diseases in Africa, Rift Valley fever (RVF). The model uses a hierarchical approach to determine how environmental drivers vary both spatially and seasonally, and incorporates the effects of key climatic oscillations, to produce a continental risk map of RVF in livestock (as a proxy for human RVF risk)...
July 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28584171/local-disease-ecosystem-livelihood-dynamics-reflections-from-comparative-case-studies-in-africa
#12
Melissa Leach, Bernard Bett, M Said, Salome Bukachi, Rosemary Sang, Neil Anderson, Noreen Machila, Joanna Kuleszo, Kathryn Schaten, Vupenyu Dzingirai, Lindiwe Mangwanya, Yaa Ntiamoa-Baidu, Elaine Lawson, Kofi Amponsah-Mensah, Lina M Moses, Annie Wilkinson, Donald S Grant, James Koninga
This article explores the implications for human health of local interactions between disease, ecosystems and livelihoods. Five interdisciplinary case studies addressed zoonotic diseases in African settings: Rift Valley fever (RVF) in Kenya, human African trypanosomiasis in Zambia and Zimbabwe, Lassa fever in Sierra Leone and henipaviruses in Ghana. Each explored how ecological changes and human-ecosystem interactions affect pathogen dynamics and hence the likelihood of zoonotic spillover and transmission, and how socially differentiated peoples' interactions with ecosystems and animals affect their exposure to disease...
July 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28576692/utero-abdominal-wall-fistula-after-cesarean-section-in-patient-with-prior-colorectal-resection-for-endometriosis-case-report-and-systematic-review
#13
Chloé Chattot, Patrick Aristizabal, Sofiane Bendifallah, Emile Daraï
Utero-Abdominal Wall Fistula (UAWF) is a very rare complication of cesarean section. We report an unusual case of a UAWF occurring in a 37-year-old woman, 4 years after a cesarean section and previously radical surgery for deep infiltrating endometriosis (DIE) with bowel resection. The patient presented with persistent purulent discharge of the Pfannenstiel scar and had noted that the discharge was blood-stained during menstruation. Magnetic resonance imaging confirmed the diagnosis of UAWF. Surgery was performed by laparotomy and was complicated by a postoperative rectovaginal fistula (RVF) which was successfully treated by the placement of a biological mesh via the vagina route...
May 30, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28543813/inhaled-pulmonary-vasodilator-therapy-for-management-of-right-ventricular-dysfunction-after-left-ventricular-assist-device-placement-and-cardiac-transplantation
#14
REVIEW
Leah A Sabato, David M Salerno, Jeremy D Moretz, Douglas L Jennings
Right ventricular failure (RVF) after cardiac transplant (CTX) or implantation of a continuous-flow left ventricular assist device (CF-LVAD) is associated with significant postoperative morbidity and mortality. A variety of modalities have been used to treat postoperative RVF, including management of volume status, intravenous inotropes and vasodilators, and right-sided mechanical support. Inhaled vasodilator agents are a unique treatment option aimed at minimizing systemic absorption by delivering therapy directly to the pulmonary vasculature...
May 24, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28542242/-we-do-not-bury-dead-livestock-like-human-beings-community-behaviors-and-risk-of-rift-valley-fever-virus-infection-in-baringo-county-kenya
#15
Edna N Mutua, Salome A Bukachi, Bernard K Bett, Benson A Estambale, Isaac K Nyamongo
BACKGROUND: Rift Valley Fever (RVF), is a viral zoonotic disease transmitted by Aedes and Culex mosquitoes. In Kenya, its occurrence is associated with increased rains. In Baringo County, RVF was first reported in 2006-2007 resulting in 85 human cases and 5 human deaths, besides livestock losses and livelihood disruptions. This study sought to investigate the county's current RVF risk status. METHODOLOGY AND PRINCIPAL FINDINGS: A cross-sectional study on the knowledge, attitudes and practices of RVF was conducted through a mixed methods approach utilizing a questionnaire survey (n = 560) and 26 focus group discussions (n = 231)...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28509675/acute-and-long-term-effects-of-left-ventricular-assist-device-support-on-right-ventricular-function-in-children-with-pediatric-pulsatile-ventricular-assist-devices
#16
Roberta Iacobelli, Arianna Di Molfetta, Gianluca Brancaccio, Sergio Filippelli, Stefano Morelli, Benedetta Natali, Alessandra Toscano, Fabrizio Drago, Antonio Amodeo
Right ventricular failure (RVF) is a significant issue when considering left ventricular assist device (LVAD) implantation in pediatrics. The aim of this study was to evaluate the effects of LVAD on right ventricular (RV) function in children. We retrospectively reviewed clinical and echocardiographic data of children who underwent Berlin Heart EXCOR LVAD focusing on RV function before and after implantation (1, 3, and 6 month follow-up). An isolated LVAD was used in 27 patients. Median age was 11 months (interquartile range [IQR]: 5-24 months), with a median weight of 6...
May 12, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28502226/stronger-interference-from-distractors-in-the-right-hemifield-during-visual-search
#17
Christophe Carlei, Dirk Kerzel
The orientation-bias hypothesis states that there is a bias to attend to the right visual hemifield (RVF) when there is spatial competition between stimuli in the left and right hemifield [Pollmann, S. (1996). A pop-out induced extinction-like phenomenon in neurologically intact subjects. Neuropsychologia, 34(5), 413-425. doi: 10.1016/0028-3932(95)00125-5 ]. In support of this hypothesis, stronger interference was reported for RVF distractors with contralateral targets. In contrast, previous studies using rapid serial visual presentation (RSVP) found stronger interference from distractors in the left visual hemifield (LVF)...
May 13, 2017: Laterality
https://www.readbyqxmd.com/read/28457351/rift-valley-fever
#18
REVIEW
Amy Hartman
Rift Valley fever (RVF) is a severe veterinary disease of livestock that also causes moderate to severe illness in people. The life cycle of RVF is complex and involves mosquitoes, livestock, people, and the environment. RVF virus is transmitted from either mosquitoes or farm animals to humans, but is generally not transmitted from person to person. People can develop different diseases after infection, including febrile illness, ocular disease, hemorrhagic fever, or encephalitis. There is a significant risk for emergence of RVF into new locations, which would affect human health and livestock industries...
June 2017: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/28455993/rectovaginal-fistula-after-low-anterior-resection-in-chinese-patients-with-colorectal-cancer
#19
Hongtu Zheng, Tianan Guo, Yuchen Wu, Cong Li, Sanjun Cai, Fangqi Liu, Ye Xu
Rectovaginal fistula is a postoperative complication of low anterior resection. We investigated the incidence of rectovaginal fistula (RVF) after low anterior resection, its risk factors and its optimal treatment. We analyzed data from 1,493 female patients who underwent low anterior resection for colorectal cancer between January 2006 and March 2016. We calculated the incidence of RVF and performed univariate and multivariate logistic regression analyses to identify risk factors. Twenty-four patients experienced RVF, giving an incidence of 1...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28437185/absence-of-evidence-of-rift-valley-fever-infection-in-eulemur-fulvus-brown-lemur-in-mayotte-during-an-interepidemic-period
#20
Raphaëlle Métras, Laure Dommergues, Katia Ortiz, Marion Pannequin, Christian Schuler, Patrick Roux, John W Edmunds, Matt J Keeling, Catherine Cêtre-Sossah, Eric Cardinale
The potential role of Eulemur fulvus (brown lemur) in the epidemiology of Rift Valley fever (RVF) in Mayotte, during an interepidemic period, was explored. In February and March 2016, 72 animals were blood sampled and tested for RVF. No evidence of RVF genome or antibodies was found in the samples. The role of other wild mammals on the island should, however, be further investigated.
May 2017: Vector Borne and Zoonotic Diseases
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