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Yellow fever in travellers

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https://www.readbyqxmd.com/read/28333617/yellow-fever-in-a-traveller-returning-from-suriname-to-the-netherlands-march-2017
#1
Marjan Wouthuyzen-Bakker, Marjolein Knoester, Aad P van den Berg, Corine H GeurtsvanKessel, Marion Pg Koopmans, Coretta Van Leer-Buter, Bob Oude Velthuis, Suzan D Pas, Wilhelmina Lm Ruijs, Jonas Schmidt-Chanasit, Stephen Gs Vreden, Tjip S van der Werf, Chantal Bem Reusken, Wouter Fw Bierman
A Dutch traveller returning from Suriname in early March 2017, presented with fever and severe acute liver injury. Yellow fever was diagnosed by (q)RT-PCR and sequencing. During hospital stay, the patient's condition deteriorated and she developed hepatic encephalopathy requiring transfer to the intensive care. Although yellow fever has not been reported in the last four decades in Suriname, vaccination is recommended by the World Health Organization for visitors to this country.
March 16, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28301270/japanese-encephalitis-vaccines-immunogenicity-protective-efficacy-effectiveness-and-impact-on-the-burden-of-disease
#2
Nagendra R Hegde, Milind M Gore
Japanese encephalitis (JE) is a serious public health concern in most of Asia. The disease is caused by JE virus (JEV), a flavivirus transmitted by Culex mosquitoes. Several vaccines have been developed to control JE in endemic areas as well as to protect travelers and military personnel who visit or are commissioned from non-endemic to endemic areas. The vaccines include inactivated vaccines produced in mouse brain or cell cultures, live attenuated vaccines, and a chimeric vaccine based on the live attenuated yellow fever virus 17D vaccine strain...
February 22, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28205633/does-zika-virus-infection-affect-mosquito-response-to-repellents
#3
Walter S Leal, Rosângela M R Barbosa, Fangfang Zeng, Gabriel B Faierstein, Kaiming Tan, Marcelo H S Paiva, Duschinka R D Guedes, Mônica M Crespo, Constância F J Ayres
The World Health Organization (WHO) recommends that people travelling to or living in areas with Zika virus (ZIKV) outbreaks or epidemics adopt prophylactic measures to reduce or eliminate mosquito bites, including the use of insect repellents. It is, however, unknown whether repellents are effective against ZIKV-infected mosquitoes, in part because of the ethical concerns related to exposing a human subject's arm to infected mosquitoes in the standard arm-in-cage assay. We used a previously developed, human subject-free behavioural assay, which mimics a human subject to evaluate the top two recommended insect repellents...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28104695/infectious-disease-risk-and-international-tourism-demand
#4
Jaume Rosselló, Maria Santana-Gallego, Waqas Awan
CONTEXT:  For some countries, favourable climatic conditions for tourism are often associated with favourable conditions for infectious diseases, with the ensuing development constraints on the tourist sectors of impoverished countries where tourism's economic contribution has a high potential. This paper evaluates the economic implications of eradication of Malaria, Dengue, Yellow Fever and Ebola on the affected destination countries focusing on the tourist expenditures. METHODS:  A gravity model for international tourism flows is used to provide an estimation of the impact of each travel-related disease on international tourist arrivals...
January 18, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/28006649/serodiagnosis-of-zika-virus-zikv-infections-by-a-novel-ns1-based-elisa-devoid-of-cross-reactivity-with-dengue-virus-antibodies-a-multicohort-study-of-assay-performance-2015-to-2016
#5
Katja Steinhagen, Christian Probst, Christiane Radzimski, Jonas Schmidt-Chanasit, Petra Emmerich, Marjan van Esbroeck, Janke Schinkel, Martin P Grobusch, Abraham Goorhuis, Jens M Warnecke, Erik Lattwein, Lars Komorowski, Andrea Deerberg, Sandra Saschenbrecker, Winfried Stöcker, Wolfgang Schlumberger
Serological diagnosis of Zika virus (ZIKV) infections is challenging due to high cross-reactivity between flaviviruses. We evaluated the diagnostic performance of a novel anti-ZIKV ELISA based on recombinant ZIKV non-structural protein 1 (NS1). Assay sensitivity was examined using sera from 27 patients with reverse transcription (RT)-PCR-confirmed and 85 with suspected ZIKV infection. Specificity was analysed using sera from 1,015 healthy individuals. Samples from 252 patients with dengue virus (n = 93), West Nile virus (n = 34), Japanese encephalitis virus (n = 25), chikungunya virus (n = 19) or Plasmodium spp...
December 15, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27960239/histopathology-of-vaccine-preventable-diseases
#6
REVIEW
Isaac H Solomon, Danny A Milner
The widespread use of vaccines has been one of the most important medical advances in the last century, saving trillions of dollars and millions of lives. Despite local eradication of some infections, travellers returning from affected areas may cause outbreaks through reintroduction of pathogens to individuals who are unable to receive vaccines for medical reasons or who have declined vaccination for non-medical reasons. Infections that would otherwise be uncommonly encountered by anatomical pathologists should therefore remain in the differential diagnosis for immunocompromised and unvaccinated patients...
January 2017: Histopathology
https://www.readbyqxmd.com/read/27771122/-vaccination-status-in-psoriasis-patients-on-immunosuppressant-therapy-including-biologics
#7
A Bonhomme, E Fréling, M Reigneau, C Poreaux, A Valois, F Truchetet, A Barbaud, J-L Schmutz
OBJECTIVES: To evaluate the vaccine coverage of psoriasis patients prior to initiating or changing immunosuppressant therapy, and to verify that the prescribed vaccines have been administered. PATIENTS AND METHODS: We conducted a bi-centre, observational, cross-sectional study over 9 months. Psoriasis patients in whom immunosuppressant therapy (comprising cyclosporine, methotrexate, etanercept, infliximab, adalimumab or ustekinumab) was indicated were included. Medical history, previous treatments, vaccination status, viral serology results (for hepatitis B, measles, and chickenpox), and reasons for non-vaccination were assessed via questionnaire...
February 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/27757795/yellow-fever-and-hajj-with-all-eyes-on-zika-a-familiar-flavivirus-remains-a-threat
#8
Qanta A Ahmed, Ziad A Memish
Hajj is among the world's largest mass gatherings, drawing between 2 and 3.5 million Muslims from 183 nations annually to perform pilgrimage in Mecca, Saudi Arabia. Infectious disease outbreaks can be imported both into the Hajj population and exported internationally by returning pilgrims. The domestic Saudi population can also be at risk of outbreaks traveling amid this mass migration. With yellow fever reported for the first time in China following the infection of expatriate Chinese workers in Angola and a full blown outbreak underway in wider West Africa, the prospect of yellow fever outbreaks in Asia threatens to impact Saudi Arabia, both during and beyond the Hajj season...
October 17, 2016: Frontiers of Medicine
https://www.readbyqxmd.com/read/27663283/travel-health-attitudes-among-turkish-business-travellers-to-african-countries
#9
Engin Burak Selcuk, Uner Kayabas, Hulisi Binbasioglu, Baris Otlu, Yasar Bayindir, Bulent Bozdogan, Mehmet Karatas
BACKGROUND: The number of international travellers is increasing worldwide. Although health risks related to international travel are important and generally well-understood, the perception of these risks was unclear among Turkish travellers. We aimed to evaluate the attitudes and health risk awareness of Turkish travellers travelling to African countries. METHOD: A survey was performed of Turkish travellers bound for Africa from Istanbul International Ataturk Airport in July 2013...
November 2016: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/27625399/travel-vaccination-recommendations-and-endemic-infection-risks-in-solid-organ-transplantation-recipients
#10
REVIEW
Jason A Trubiano, Douglas Johnson, Asma Sohail, Joseph Torresi
BACKGROUND: Solid organ transplant (SOT) recipients are often heavily immunosuppressed and consequently at risk of serious illness from vaccine preventable viral and bacterial infections or with endemic fungal and parasitic infections. We review the literature to provide guidance regarding the timing and appropriateness of vaccination and pathogen avoidance related to the immunological status of SOT recipients. METHODS: A PUBMED search ([Vaccination OR vaccine] AND/OR ["specific vaccine"] AND/OR [immunology OR immune response OR cytokine OR T lymphocyte] AND transplant was performed...
June 2016: Journal of Travel Medicine
https://www.readbyqxmd.com/read/27573631/dengue-virus-seroconversion-in-travelers-to-dengue-endemic-areas
#11
Rosemary M Olivero, Davidson H Hamer, William B MacLeod, Christine M Benoit, Carolina Sanchez-Vegas, Emily S Jentes, Lin H Chen, Mary E Wilson, Nina Marano, Emad A Yanni, Winnie W Ooi, Adolf W Karchmer, Laura Kogelman, Elizabeth D Barnett
We conducted a prospective study to measure dengue virus (DENV) antibody seroconversion in travelers to dengue-endemic areas. Travelers seen in the Boston Area Travel Medicine Network planning to visit dengue-endemic countries for ≥ 2 weeks were enrolled from 2009 to 2010. Pre- and post-travel blood samples and questionnaires were collected. Post-travel sera were tested for anti-DENV IgG by indirect IgG enzyme-linked immunosorbent assay (ELISA) and anti-DENV IgM by capture IgM ELISA. Participants with positive post-travel anti-DENV IgG or IgM were tested for pre-travel anti-DENV IgG and IgM; they were excluded from the seroconversion calculation if either pre-travel anti-DENV IgG or IgM were positive...
November 2, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27541082/international-health-regulations-in-practice-focus-on-yellow-fever-and-poliomyelitis
#12
H Simons, D Patel
ASBTRACT The spread of infectious disease represents a global threat and therefore remains a priority on the international public health agenda. The International Health Regulations (IHR) (2005) came into effect in June 2007 and provide a legal framework to which the 196 member states of the World Health Assembly agree to abide. (1) These regulations include implementation of protective, control and response measures at points of entry to a country (i.e. land borders, sea and airports), and of notification measures, all of which aim to prevent or limit the spread of disease while minimising disruption to international trade...
October 2, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27503852/vaccination-knowledge-attitude-and-practice-among-chinese-travelers-who-visit-travel-clinics-in-preparation-for-international-travel
#13
Min Zhang, Jianming Zhang, Yutong Hao, ZhengXing Fan, Lei Li, Yiguang Li, Wendong Ju, Hong Zhang, Wei Liu, Mengzhang Zhang, Di Wu, Hongtao He
BACKGROUND: Although international travel has become increasingly more common in main land China, few data are available on vaccination knowledge, attitude and practice (KAP) among Chinese travelers. METHOD: In each of 14 International Travel Healthcare Centers (ITHCs) situated in mainland China 200 volunteers were recruited for a cross-sectional investigation by questionnaire on KAP related to travel vaccinations. For the evaluation the study subjects were grouped by demographic data, past travel experience, travel destination, duration of stay abroad, purpose of travel...
June 2016: Journal of Travel Medicine
https://www.readbyqxmd.com/read/27469112/zika-virus-a-new-arboviral-public-health-problem
#14
REVIEW
Tulin Demir, Selcuk Kilic
Zika virus (ZIKV) is a single-stranded RNA virus in the Flaviviridae family and transmitted to human through infected mosquitos (Aedes aegypti and Aedes albopictus). Virus is closely related with other flaviviruses; dengue virus, yellow fever virus, West Nile virus, and Japanese encephalitis virus phylogenetically. Due to the possible relationship between virus and clinical features including microcephaly, ventricule, and eye deformities, Guillain-Barre syndrome increases the interest on this virus gradually...
November 2016: Folia Microbiologica
https://www.readbyqxmd.com/read/27406389/a-fatal-yellow-fever-virus-infection-in-china-description-and-lessons
#15
Zhihai Chen, Lin Liu, Yanning Lv, Wei Zhang, Jiandong Li, Yi Zhang, Tian Di, Shuo Zhang, Jingyuan Liu, Jie Li, Jing Qu, Wenhao Hua, Chuan Li, Peng Wang, Quanfu Zhang, Yanli Xu, Rongmeng Jiang, Qin Wang, Lijuan Chen, Shiwen Wang, Xinghuo Pang, Mifang Liang, Xuejun Ma, Xingwang Li, Quanyi Wang, Fujie Zhang, Dexin Li
Yellow fever (YF) is a viral disease endemic to the tropical regions of Africa and South America. An outbreak of YF has been occurring in Angola, since the beginning of 2016. In March 2016, a 32-year-old Chinese man who returned from Angola was hospitalized and diagnosed with the first case of imported YF in China. Clinical observations, blood viral RNA detection, serological testing and treatments for the patient were performed daily. The virus was isolated in Vero cells, and the complete viral genome was sequenced and analyzed using the next-generation genomic sequencing platform...
July 13, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27378369/adverse-event-reports-following-yellow-fever-vaccination-2007-13
#16
Nicole P Lindsey, Ingrid B Rabe, Elaine R Miller, Marc Fischer, J Erin Staples
BACKGROUND: Yellow fever (YF) vaccines have been available since the 1930s and are generally considered safe and effective. However, rare reports of serious adverse events (SAE) following vaccination have prompted the Advisory Committee for Immunization Practices to periodically expand the list of conditions considered contraindications and precautions to vaccination. METHODS: We describe adverse events following YF vaccination reported to the U.S. Vaccine Adverse Event Reporting System (VAERS) from 2007 through 2013 and calculate age- and sex-specific reporting rates of all SAE, anaphylaxis, YF vaccine-associated neurologic disease (YEL-AND) and YF vaccine-associated viscerotropic disease (YEL-AVD)...
May 2016: Journal of Travel Medicine
https://www.readbyqxmd.com/read/27343438/dengue-vaccines-are-they-safe-for-travelers
#17
Scott B Halstead, Maira Aguiar
The four dengue viruses (DENV) circulate among nearly one-half of the world's population in tropical and semitropical countries imposing a huge morbidity burden on travelers. Sanofipasteur has developed a tetravalent live-attenuated vaccine, Dengvaxia, recently approved by the World Health Organization and licensed in four dengue-endemic countries. An additional two dengue vaccines, developed by the National Institute of Allergy and Infectious Diseases (NIAID), USA and Takeda, are entering phase III testing...
July 2016: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/27323600/-another-vector-borne-challenge-to-combat-zika-virus-outbreaks
#18
Maria Shoaib, Ahmad Faraz, Syed Ahsanuddin Ahmed
Zika virus is a single-stranded RNA virus of the Flaviviridae family. It is known to transmit to humans primarily through the bite of an infected Aedes species mosquito which is also known to carry dengue, chikungunya & yellow fever virus. Transmission is anthroponotic (human-to-vector-to-human) during outbreaks, Perinatally in utero, sexually and via infected blood transfusion. It is mild and self-limiting infection lasting for several days to a week. However, it is suspected as a cause of Guillain Barre Syndrome...
January 2016: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/27296582/unpredictable-checks-of-yellow-fever-vaccination-certificates-upon-arrival-in-tanzania
#19
Selina Schönenberger, Christoph Hatz, Silja Bühler
BACKGROUND: Yellow fever (YF) is a mosquito-borne disease, which can be prevented by vaccination. While YF vaccination (YFV) is not generally recommended for travellers to Tanzania, proof of YFV may be required upon arrival. In April 2013, the World Health Organization concluded that one dose of YFV confers lifelong protection and countries have started to adapt their entry requirements. The traveller's consultant has to balance the risk of YFV and the risk of encountering problems when entering a country without a valid YFV, especially because countries are slowly implementing the requirements...
May 2016: Journal of Travel Medicine
https://www.readbyqxmd.com/read/27156836/yellow-fever-cases-in-asia-primed-for-an-epidemic
#20
REVIEW
Sean Wasserman, Paul Anantharajah Tambyah, Poh Lian Lim
There is currently an emerging outbreak of yellow fever in Angola. Cases in infected travellers have been reported in a number of other African countries, as well as in China, representing the first ever documented cases of yellow fever in Asia. There is a large Chinese workforce in Angola, many of whom may be unvaccinated, increasing the risk of ongoing importation of yellow fever into Asia via busy commercial airline routes. Large parts of the region are hyperendemic for the related Flavivirus dengue and are widely infested by Aedes aegypti, the primary mosquito vector of urban yellow fever transmission...
July 2016: International Journal of Infectious Diseases: IJID
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