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https://www.readbyqxmd.com/read/28051125/reconstruction-of-rift-valley-fever-transmission-dynamics-in-madagascar-estimation-of-force-of-infection-from-seroprevalence-surveys-using-bayesian-modelling
#1
Marie-Marie Olive, Vladimir Grosbois, Annelise Tran, Lalaina Arivony Nomenjanahary, Mihaja Rakotoarinoro, Soa-Fy Andriamandimby, Christophe Rogier, Jean-Michel Heraud, Veronique Chevalier
The force of infection (FOI) is one of the key parameters describing the dynamics of transmission of vector-borne diseases. Following the occurrence of two major outbreaks of Rift Valley fever (RVF) in Madagascar in 1990-91 and 2008-09, recent studies suggest that the pattern of RVF virus (RVFV) transmission differed among the four main eco-regions (East, Highlands, North-West and South-West). Using Bayesian hierarchical models fitted to serological data from cattle of known age collected during two surveys (2008 and 2014), we estimated RVF FOI and described its variations over time and space in Madagascar...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28029091/serological-and-genomic-evidence-of-rift-valley-fever-virus-during-inter-epidemic-periods-in-mauritania
#2
M Rissmann, M Eiden, B O El Mamy, K Isselmou, B Doumbia, U Ziegler, T Homeier-Bachmann, B Yahya, M H Groschup
Rift Valley fever virus (RVFV) is an emerging pathogen of major concern throughout Africa and the Arabian Peninsula, affecting both livestock and humans. In the past recurrent epidemics were reported in Mauritania and studies focused on the analysis of samples from affected populations during acute outbreaks. To verify characteristics and presence of RVFV during non-epidemic periods we implemented a multi-stage serological and molecular analysis. Serum samples of small ruminants, cattle and camels were obtained from Mauritania during an inter-epidemic period in 2012-2013...
December 28, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/28012779/vaccination-of-alpacas-against-rift-valley-fever-virus-safety-immunogenicity-and-pathogenicity-of-mp-12-vaccine
#3
M Rissmann, R Ulrich, C Schröder, B Hammerschmidt, D Hanke, C Mroz, M H Groschup, M Eiden
Rift Valley fever (RVF) is an emerging zoonosis of major public health concern in Africa and Arabia. Previous outbreaks attributed camelids a significant role in the epidemiology of Rift Valley fever virus (RVFV), making them an important target species for vaccination. Using three alpacas as model-organisms for dromedary camels, the safety, immunogenicity and pathogenicity of the MP-12 vaccine were evaluated in this study. To compare both acute and subacute effects, animals were euthanized at 3 and 31days post infection (dpi)...
December 21, 2016: Vaccine
https://www.readbyqxmd.com/read/28011732/effects-of-irrigation-and-rainfall-on-the-population-dynamics-of-rift-valley-fever-and-other-arbovirus-mosquito-vectors-in-the-epidemic-prone-tana-river-county-kenya
#4
R Sang, J Lutomiah, M Said, A Makio, H Koka, E Koskei, A Nyunja, S Owaka, D Matoke-Muhia, S Bukachi, J Lindahl, D Grace, B Bett
Rift Valley fever (RVF) is a mosquito-borne viral zoonosis that is found in most regions of sub-Saharan Africa, and it affects humans, livestock, and some wild ungulates. Outbreaks are precipitated by an abundance of mosquito vectors associated with heavy persistent rainfall with flooding. We determined the impact of flood-irrigation farming and the effect of environmental parameters on the ecology and densities of primary and secondary vectors of the RVF virus (RVFV) in an RVF-epidemic hotspot in the Tana River Basin, Kenya...
December 22, 2016: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28002417/predicting-rift-valley-fever-inter-epidemic-activities-and-outbreak-patterns-insights-from-a-stochastic-host-vector-model
#5
Sansao A Pedro, Shirley Abelman, Henri E Z Tonnang
Rift Valley fever (RVF) outbreaks are recurrent, occurring at irregular intervals of up to 15 years at least in East Africa. Between outbreaks disease inter-epidemic activities exist and occur at low levels and are maintained by female Aedes mcintoshi mosquitoes which transmit the virus to their eggs leading to disease persistence during unfavourable seasons. Here we formulate and analyse a full stochastic host-vector model with two routes of transmission: vertical and horizontal. By applying branching process theory we establish novel relationships between the basic reproduction number, R0, vertical transmission and the invasion and extinction probabilities...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27987097/radiation-induced-rectovaginal-fistulas-in-locally-advanced-gynaecological-malignancies-new-patients-old-problem
#6
Piotr Zelga, Marcin Tchórzewski, Marta Zelga, Janusz Sobotkowski, Adam Dziki
PURPOSE: Radiation-induced rectovaginal fistula (RI-RVF) is a chronic and serious condition with a significant influence on quality of life. The aim of this study is to evaluate the results of surgical treatment of rectovaginal fistulas of patients previously undergoing radiotherapy. METHODS: Fifty patients treated in the Gynaecological Radiotherapy Unit for gynaecologic malignancy and in the Department of General and Colorectal Surgery for RI-RVF between 2003 and 2013 were enrolled into a prospectively maintained database and underwent regular follow-up examinations in an outpatient clinic, during which surgical outcomes were assessed...
December 16, 2016: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/27977670/serological-evidence-of-contrasted-exposure-to-arboviral-infections-between-islands-of-the-union-of-comoros-indian-ocean
#7
Koussay Dellagi, Nicolas Salez, Marianne Maquart, Sophie Larrieu, Amina Yssouf, Rahamatou Silaï, Isabelle Leparc-Goffart, Pablo Tortosa, Xavier de Lamballerie
A cross sectional serological survey of arboviral infections in humans was conducted on the three islands of the Union of Comoros, Indian Ocean, in order to test a previously suggested contrasted exposure of the three neighboring islands to arthropod-borne epidemics. Four hundred human sera were collected on Ngazidja (Grande Comore), Mwali (Mohéli) and Ndzouani (Anjouan), and were tested by ELISA for IgM and/or IgG antibodies to Dengue (DENV), Chikungunya (CHIKV), Rift Valley fever (RVFV), West Nile (WNV), Tick borne encephalitis (TBEV) and Yellow fever (YFV) viruses and for neutralizing antibodies to DENV serotypes 1-4...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27973528/modelling-vaccination-strategies-against-rift-valley-fever-in-livestock-in-kenya
#8
John M Gachohi, M Kariuki Njenga, Philip Kitala, Bernard Bett
BACKGROUND: The impacts of vaccination on the transmission of Rift Valley fever virus (RVFV) have not been evaluated. We have developed a RVFV transmission model comprising two hosts-cattle as a separate host and sheep and goats as one combined host (herein after referred to as sheep)-and two vectors-Aedes species (spp) and Culex spp-and used it to predict the impacts of: (1) reactive vaccination implemented at various levels of coverage at pre-determined time points, (2) targeted vaccination involving either of the two host species, and (3) a periodic vaccination implemented biannually or annually before an outbreak...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27929928/seroepidemiological-survey-of-rift-valley-fever-virus-in-ruminants-in-garissa-kenya
#9
Mark O Nanyingi, Gerald M Muchemi, Samuel M Thumbi, Fredrick Ade, Clayton O Onyango, Stephen G Kiama, Bernard Bett
INTRODUCTION: Rift Valley fever (RVF) is a vector-borne zoonotic disease caused by phlebovirus in the family Bunyaviridae. In Kenya, major outbreaks occurred in 1997-1998 and 2006-2007 leading to human deaths, huge economic losses because of livestock morbidity, mortality, and restrictions on livestock trade. AIM: This study was conducted to determine RVF seroprevalence in cattle, sheep, and goats during an interepidemic period in Garissa County in Kenya. METHODS: In July 2013, we performed a cross-sectional survey and sampled 370 ruminants from eight RVF-prone areas of Garissa County...
December 8, 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27897974/delayed-coloanal-anastomosis-for-rectovaginal-fistula-after-colorectal-resection-for-deep-endometriosis
#10
Gaetano Gallo, Alberto Realis Luc, Roberta Tutino, Giuseppe Clerico, Mario Trompetto
AIM: The deep infiltrating endometriosis, defined as a subperitoneal infiltration of endometrial implants of ≥ 5 mm involving not only the colorectal tract but also rectovaginal septum, vagina and bladder often requires a challenging surgery. Endometriosis nodes of the rectovaginal septum, if symptomatic, need a resection of the involved colorectal tract with colorectal or coloanal anastomosis. Unfortunately in these cases is not uncommon the possibility of a postoperative rectovaginal fistula (RVF), caused by the weakness of the septum that must be skeletonized to completely remove the endometriosis nodes...
November 28, 2016: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/27863533/ecological-niche-modelling-of-rift-valley-fever-virus-vectors-in-baringo-kenya
#11
Alfred O Ochieng, Mark Nanyingi, Edwin Kipruto, Isabella M Ondiba, Fred A Amimo, Christopher Oludhe, Daniel O Olago, Isaac K Nyamongo, Benson B A Estambale
BACKGROUND: Rift Valley fever (RVF) is a vector-borne zoonotic disease that has an impact on human health and animal productivity. Here, we explore the use of vector presence modelling to predict the distribution of RVF vector species under climate change scenario to demonstrate the potential for geographic spread of Rift Valley fever virus (RVFV). OBJECTIVES: To evaluate the effect of climate change on RVF vector distribution in Baringo County, Kenya, with an aim of developing a risk map for spatial prediction of RVF outbreaks...
2016: Infection Ecology & Epidemiology
https://www.readbyqxmd.com/read/27844026/severe-human-illness-caused-by-rift-valley-fever-virus-in-mauritania-2015
#12
Boushab Mohamed Boushab, Fatima Zahra Fall-Malick, Sidi El Wafi Ould Baba, Mohamed Lemine Ould Salem, Marie Roseline Darnycka Belizaire, Hamade Ledib, Mohamed Mahmoud Ould Baba Ahmed, Leonardo Kishi Basco, Hampaté Ba
BACKGROUND: Rift Valley Fever epizootics are characterized by numerous abortions and mortality among young animals. In humans, the illness is usually characterized by a mild self-limited febrile illness, which could progress to more serious complications.Objectives. The aim of the present prospective study was to describe severe clinical signs and symptoms of Rift Valley Fever in southern Mauritania. PATIENTS AND METHODS: Suspected cases were enrolled in Kiffa (Assaba) and Aleg (Brakna) Hospital Centers from September 1 to November 7, 2015, based on the presence of fever, hemorrhagic or meningoencephalitic syndromes, and probable contact with sick animals...
October 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27833686/first-report-of-survival-in-refractory-ventricular-fibrillation-after-dual-axis-defibrillation-and-esmolol-administration
#13
Kevin M Boehm, Daniel C Keyes, Laura E Mader, J Michelle Moccia
There is a subset of patients who suffer a witnessed ventricular fibrillation (VF) arrest and despite receiving reasonable care with medications (epinephrine and amiodarone) and multiple defibrillations (3+ attempts at 200 joules of biphasic current) remain in refractory VF (RVF), also known as electrical storm. The mortality for these patients is as high as 97%. We present the case of a patient who, with a novel approach, survived RVF to outpatient follow up.
November 2016: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27831998/hemodynamic-performance-of-a-novel-right-ventricular-assist-device-perkat%C3%A2
#14
Daniel Kretzschmar, P Christian Schulze, Markus W Ferrari
Acute right ventricular failure (RVF) is an increasingly clinical problem and a life-threatening condition. Right ventricular assist devices (RVADs) represent a reasonable treatment option for patients with refractory RVF. We here present a novel percutaneously implantable device for RV support.The PERKAT device is based on a nitinol stent cage which is covered with valve- carrying foils. A flexible outlet trunk with a pigtail tip is connected to the distal part. The device is driven by an IABP drive unit which inflates/deflates a standard IABP balloon placed within in the stent cage...
November 9, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27830387/public-health-benefits-from-livestock-rift-valley-fever-control-a-simulation-of-two-epidemics-in-kenya
#15
Tabitha Kimani, Esther Schelling, Bernard Bett, Margaret Ngigi, Tom Randolph, Samuel Fuhrimann
In controlling Rift Valley fever, public health sector optimises health benefits by considering cost-effective control options. We modelled cost-effectiveness of livestock RVF control from a public health perspective in Kenya. Analysis was limited to pastoral and agro-pastoral system high-risk areas, for a 10-year period incorporating two epidemics: 2006/2007 and a hypothetical one in 2014/2015. Four integrated strategies (baseline and alternatives), combined from three vaccination and two surveillance options, were compared...
December 2016: EcoHealth
https://www.readbyqxmd.com/read/27811840/notes-from-the-field-rift-valley-fever-response-kabale-district-uganda-march-2016
#16
Annabelle de St Maurice, Luke Nyakarahuka, Lawrence Purpura, Elizabeth Ervin, Alex Tumusiime, Stephen Balinandi, Jackson Kayondo, Sophia Mulei, Anne Marion Namutebi, Patrick Tusiime, Steven Wiersma, Stuart Nichol, Pierre Rollin, John Klena, Barbara Knust, Trevor Shoemaker
On March 9, 2016, a male butcher from Kabale District, Uganda, aged 45 years, reported to the Kabale Regional Referral Hospital with fever, fatigue, and headache associated with black tarry stools and bleeding from the nose. One day later, a student aged 16 years from a different sub-county in Kabale District developed similar symptoms and was admitted to the same hospital. The student also had a history of contact with livestock. Blood specimens collected from both patients were sent for testing for Marburg virus disease, Ebola virus disease, Rift Valley fever (RVF), and Crimean Congo Hemorrhagic fever at the Uganda Virus Research Institute, as part of the viral hemorrhagic fevers surveillance program...
November 4, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27746345/face-gender-categorization-and-hemispheric-asymmetries-contrasting-evidence-from-connected-and-disconnected-brains
#17
Giulia Prete, Mara Fabri, Nicoletta Foschi, Luca Tommasi
We investigated hemispheric asymmetries in categorization of face gender by means of a divided visual field paradigm, in which female and male faces were presented unilaterally for 150ms each. A group of 60 healthy participants (30 males) and a male split-brain patient (D.D.C.) were asked to categorize the gender of the stimuli. Healthy participants categorized male faces presented in the right visual field (RVF) better and faster than when presented in the left visual field (LVF), and female faces presented in the LVF than in the RVF, independently of the participants' sex...
December 17, 2016: Neuroscience
https://www.readbyqxmd.com/read/27739100/a-novel-semiquantitative-assessment-of-right-ventricular-systolic-function-with-a-modified-subcostal-echocardiographic-view
#18
José L Díaz-Gómez, Andres Borja Alvarez, Jonathan J Danaraj, Michelle L Freeman, Augustine S Lee, Farouk Mookadam, Brian P Shapiro, Harish Ramakrishna
OBJECTIVES: The tricuspid annular plane systolic excursion (TAPSE) is a validated measure of right ventricular function; however, the apical echocardiographic window varies and has limitations in intensive care unit (ICU) patients receiving mechanical ventilation or those with underlying disease and air entrapment. We aimed to evaluate the subcostal echocardiographic assessment of tricuspid annular kick (SEATAK) as an alternative to TAPSE in critically ill patients. METHODS: To measure SEATAK, we obtained the subcostal inferior vena cava view and used M-mode to measure excursion of the tricuspid annulus (kick)...
October 14, 2016: Echocardiography
https://www.readbyqxmd.com/read/27707507/rift-valley-fever-trasmission-dynamics-described-by-compartmental-models
#19
REVIEW
Maria Luisa Danzetta, Rossana Bruno, Francesca Sauro, Lara Savini, Paolo Calistri
Rift Valley fever (RVF) is one of the most important zoonotic Transboundary Animal Diseases able to cross international borders and cause devastating effect on animal health and food security. Climate changes and the presence of competent vectors in the most of the current RVF-free temperate countries strongly support the inclusion of RVF virus (RVFV) among the most significant emerging viral threats for public and animal health. The transmission of RVFV is driven by complex eco-climatic factors making the epidemiology of RVF infection difficult to study and to understand...
November 1, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27704007/widespread-rift-valley-fever-emergence-in-senegal-in-2013-2014
#20
Abdourahmane Sow, Ousmane Faye, Yamar Ba, Diawo Diallo, Gamou Fall, Oumar Faye, Ndeye Sakha Bob, Cheikh Loucoubar, Vincent Richard, Anta Tal Dia, Mawlouth Diallo, Denis Malvy, Amadou Alpha Sall
Rift Valley fever (RVF), which caused epizootics and epidemics among human and livestock populations, occurred in Senegal in 2013-2014. A multidisciplinary field investigation was carried out in 3 regions of Senegal. We found 11 confirmed human cases of Rift Valley fever, including severe cases with encephalitis and retinitis, 1 pool of mosquito (Aedes ochraceus), and 52 animals tested positive for the disease. Symptoms such as encephalitis and macular retinitis were the most severe cases reported so far in Senegal...
September 2016: Open Forum Infectious Diseases
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