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https://www.readbyqxmd.com/read/28931134/risk-activities-and-pre-travel-health-seeking-practices-of-notified-cases-of-imported-infectious-diseases-in-australia
#1
Prakash Paudel, C Raina, Nicholas Zwar, Holly Seale, Heather Worth, Mohamud Sheikh, Anita E Heywood
Background: Travellers are at risk of acquiring infectious diseases during travel, with risks differing by destination, travel and traveller characteristics. A pre-travel health consultation may minimize this risk. However, uptake of pre-travel health advice remains low. We investigated pre-travel health preparations and disease-specific risk behaviours among notified cases of selected travel-associated infectious diseases imported into Australia. Methods: Prospective enhanced surveillance of notified cases of typhoid, paratyphoid, measles, hepatitis A, hepatitis E, malaria and chikungunya was conducted in two Australian states between February 2013 and January 2014...
September 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28929089/two-novel-salmonella-bivalent-vaccines-confer-dual-protection-against-two-salmonella-serovars-in-mice
#2
Xinxin Zhao, Qinlong Dai, Renyong Jia, Dekang Zhu, Mafeng Liu, Mingshu Wang, Shun Chen, Kunfeng Sun, Qiao Yang, Ying Wu, Anchun Cheng
Non-typhoidal Salmonella includes thousands of serovars that are leading causes of foodborne diarrheal illness worldwide. In this study, we constructed three bivalent vaccines for preventing both Salmonella Typhimurium and Salmonella Newport infections by using the aspartate semialdehyde dehydrogenase (Asd)-based balanced-lethal vector-host system. The constructed Asd(+) plasmid pCZ11 carrying a subset of the Salmonella Newport O-antigen gene cluster including the wzx-wbaR-wbaL-wbaQ-wzy-wbaW-wbaZ genes was introduced into three Salmonella Typhimurium mutants: SLT19 (Δasd) with a smooth LPS phenotype, SLT20 (Δasd ΔrfbN) with a rough LPS phenotype, and SLT22 (Δasd ΔrfbN ΔpagL::T araC PBADrfbN) with a smooth LPS phenotype when grown with arabinose...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28919688/vaccination-with-salmonella-typhi-recombinant-outer-membrane-protein-28-induces-humoral-but-non-protective-immune-response-in-rabbit
#3
Anjani Saxena, Rajesh Kumar, Mumtesh Kumar Saxena
AIM: Typhoid is one of the most important food and water borne disease causing millions of deaths over the world. Presently, there is no cost effective vaccine available in India. The outer-membrane proteins (Omps) of Salmonella have been exhibited as a potential candidate for development of subunit vaccine against typhoid. The objective of the present study was to evaluate the use of recombinant Omp 28 protein for immunization of rabbit to elucidate its protection against virulent Salmonella Typhi...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28885461/vaccinations-and-malaria-chemoprophylaxis-of-adolescents-traveling-from-greece-to-international-destinations-a-nine-year-prospective-study
#4
Helena C Maltezou, Androula Pavli, Kalliopi Theodoridou, Panos Katerelos, Athina Spilioti, Anastasia Tedoma, Ioanna Lymperi, Maria Theodoridou
BACKGROUND: There are few publications focusing on vaccination and malaria chemoprophylaxis in adolescent travelers. We assessed pre-travel vaccinations and malaria chemoprophylaxis of adolescents 12-18 old traveling from Greece to international destinations. METHODS: We prospectively studied 239 adolescents 12-18 years old during 2008-2016. A standard questionnaire was used to collect data. RESULTS: Adolescents sought pre-travel services at a mean of 24...
September 6, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28873442/use-of-a-novel-antigen-expressing-system-to-study-the-salmonella-enterica-serovar-typhi-protein-recognition-by-t-cells
#5
Rosângela Salerno-Gonçalves, Hervé Tettelin, David Lou, Stephanie Steiner, Tasmia Rezwanul, Qin Guo, William D Picking, Vishvanath Nene, Marcelo B Sztein
Salmonella enterica serovar Typhi (S. Typhi), the causative agent of the typhoid fever, is a pathogen of great public health importance. Typhoid vaccines have the potential to be cost-effective measures towards combating this disease, yet the antigens triggering host protective immune responses are largely unknown. Given the key role of cellular-mediated immunity in S. Typhi protection, it is crucial to identify S. Typhi proteins involved in T-cell responses. Here, cells from individuals immunized with Ty21a typhoid vaccine were collected before and after immunization and used as effectors...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28856924/review-of-current-typhoid-fever-vaccines-cross-protection-against-paratyphoid-fever-and-the-european-guidelines
#6
Jane N Zuckerman, Christoph Hatz, Anu Kantele
Typhoid and paratyphoid fever remain a global health problem, which - in non-endemic countries - are mainly seen in travelers, particularly in VFRs (visiting friends and relatives), with occasional local outbreaks occurring. A rise in anti-microbial resistance emphasizes the role of preventive measures, especially vaccinations against typhoid and paratyphoid fever for travelers visiting endemic countries. Areas covered: This state-of-the-art review recapitulates the epidemiology and mechanisms of disease of typhoid and paratyphoid fever, depicts the perspective of non-endemic countries and travelers (VFRs), and collectively presents current European recommendations for typhoid fever vaccination...
August 31, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28838752/child-and-adolescent-mortality-across-malaysia-s-epidemiological-transition-a-systematic-analysis-of-global-burden-of-disease-data
#7
Suraya Abdul-Razak, Peter S Azzopardi, George C Patton, Ali H Mokdad, Susan M Sawyer
PURPOSE: A rapid epidemiological transition in developing countries in Southeast Asia has been accompanied by major shifts in the health status of children and adolescents. In this article, mortality estimates in Malaysian children and adolescents from 1990 to 2013 are used to illustrate these changes. METHODS: All-cause and cause-specific mortality estimates were obtained from the 2013 Global Burden of Disease Study. Data were extracted from 1990 to 2013 for the developmental age range from 1 to 24 years, for both sexes...
August 21, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28836651/surveillance-of-communicable-diseases-for-decisionmaking-in-egypt-2006-2013
#8
Madiha S M Abdel-Razik, Hoda I I Rizk, Mahmoud H M Hassan
The Egyptian Ministry of Health and Population surveillance system provides data about notifiable communicable diseases. This study aimed to provide information for decision-making to reduce the burden of communicable diseases in Egypt by analysis of the surveillance data for 2006-2013 to identify trends in the incidence of the diseases by governorate, season, age and sex. Composite risk-index scores were estimated to rank the 27 Egyptian governorates into 3 groups: high, medium and low risk. The 15 diseases with the highest incidence were food and waterborne diseases (5 diseases), vaccine-preventable diseases (7 diseases) and others, e...
August 20, 2017: Eastern Mediterranean Health Journal, la Revue de Santé de la Méditerranée Orientale
https://www.readbyqxmd.com/read/28802757/the-typhoid-vaccine-acceleration-consortium-tyvac-vaccine-effectiveness-study-designs-accelerating-the-introduction-of-typhoid-conjugate-vaccines-and-reducing-the-global-burden-of-enteric-fever-report-from-a-meeting-held-on-26-27-october-2016-oxford-uk
#9
James E Meiring, Malick Gibani
Typhoid fever is estimated to cause between 11.9-26.9 million infections globally each year with 129,000-216,510 deaths. Access to improved water sources have reduced disease incidence in parts of the world but the use of efficacious vaccines is seen as an important public health tool for countries with a high disease burden. A new generation of Vi typhoid conjugate vaccines (TCVs), licensed for use in young children and expected to provide longer lasting protection than previous vaccines, are now available...
September 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28792376/construction-of-an-inactivated-typhoid-vaccine-candidate-expressing-escherichia-coli-heat-labile-enterotoxin-b-subunit-and-evaluation-of-its-immunogenicity-in-a-murine-model
#10
Boram Kim, Gayeon Won, John Hwa Lee
PURPOSE: Typhoid fever caused by Salmonella enterica serovar Typhi has contributed to the global public health burden, particularly in developing countries. In this study, an S. Typhi ghost was developed and its capacity as a vaccine candidate against typhoid fever was assessed. METHODOLOGY: An asd+ plasmid pJHL187 harbouring a ghost cassette comprising the PhiX 174 Elysis gene tightly controlled under the convergent promotor system was transformed into an asd gene-deleted mutant S...
August 10, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28774810/preparedness-of-adolescents-departing-from-athens-international-airport-to-africa-or-asia-a-five-year-airport-based-prospective-study
#11
Helena C Maltezou, Androula Pavli, Kalliopi Theodoridou, Eleftherios Bournousouzis, Athanasios Minitsios, Panos Katerelos, Ioanna Lymperi, Maria Theodoridou
BACKGROUND: The number of adolescents who travel has increased. We estimated the preparedness of adolescents (12-18 years) departing from Athens to Africa and Asia. METHODS: An airport-based survey was conducted from 2011 to 2015. RESULTS: Sixty-eight adolescents participated; 27/68 (40%) had the Greek nationality. Their main destinations were the Indian subcontinent (37%) and South-East Asia (32%). Most adolescents planned to stay for <1 month (69%) or for 1-3 months (22%)...
August 1, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28754982/recombinant-attenuated-salmonella-typhimurium-with-heterologous-expression-of-the-salmonella-choleraesuis-o-polysaccharide-high-immunogenicity-and-protection
#12
Xinxin Zhao, Qinlong Dai, Dekang Zhu, Mafeng Liu, Shun Chen, Kunfeng Sun, Qiao Yang, Ying Wu, Qingke Kong, Renyong Jia
Non-typhoidal Salmonella are associated with gastrointestinal disease worldwide and invasive disease in Africa. We constructed novel bivalent vaccines through the recombinant expression of heterologous O-antigens from Salmonella Choleraesuis in Salmonella Typhimurium. A recombinant Asd(+) plasmid pCZ1 with the cloned Salmonella Choleraesuis O-antigen gene cluster was introduced into three constructed Salmonella Typhimurium Δasd mutants: SLT11 (ΔrfbP), SLT12 (ΔrmlB-rfbP) and SLT16 (ΔrfbP ∆pagL::TT araCPBAD rfbP)...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28753671/self-reported-infections-during-international-travel-and-notifiable-infections-among-returning-international-travellers-sweden-2009-2013
#13
Viktor Dahl, Anders Wallensten
We studied food and water-borne diseases (FWDs), sexually transmitted diseases (STDs), vector-borne diseases (VBDs) and diseases vaccinated against in the Swedish childhood vaccination programme among Swedish international travellers, in order to identify countries associated with a high number of infections. We used the national database for notifiable infections to estimate the number of FWDs (campylobacteriosis, salmonellosis, giardiasis, shigellosis, EHEC, Entamoeba histolytica, yersinosis, hepatitis A, paratyphoid fever, typhoid fever, hepatitis E, listeriosis, cholera), STIs (chlamydia, gonorrhoea and acute hepatitis B), VBDs (dengue fever, malaria, West Nile fever, Japanese encephalitis and yellow fever) and diseases vaccinated against in the Swedish childhood vaccination programme (pertussis, measles, mumps, rubella, diphtheria) acquired abroad 2009-2013...
2017: PloS One
https://www.readbyqxmd.com/read/28739115/a-recombinant-protein-of-salmonella-typhi-induces-humoral-and-cell-mediated-immune-responses-including-memory-responses
#14
Sayan Das, Rimi Chowdhury, Shubhamoy Ghosh, Santasabuj Das
Gram negative enteric bacteria, Salmonella enterica serovar Typhi (S. Typhi), the etiological agent of typhoid fever is a major public health problem in developing countries. While a permanent solution to the problem would require improved sanitation, food and water hygiene, controlling the infection by vaccination is urgently required due to the emergence of multidrug resistant strains in multiple countries. The currently licensed vaccines are moderately efficacious with limited applicability, and no recommended vaccines exist for younger children...
July 21, 2017: Vaccine
https://www.readbyqxmd.com/read/28735760/first-characterization-of-immunogenic-conjugates-of-vi-negative-salmonella-typhi-o-specific-polysaccharides-with-repa-protein-for-vaccine-development
#15
M Salman, F St Michael, A Ali, A Jabbar, C Cairns, A C Hayes, M Rahman, M Iqbal, A Haque, A D Cox
Efficacious typhoid vaccines for young children will significantly reduce the disease burden in developing world. The Vi polysaccharide based conjugate vaccines (Vi-rEPA) against Salmonella Typhi Vi positive strains has shown high efficacy but may be ineffective against Vi negative S. Typhi. In this study, for the first time, we report the synthesis and evaluation of polysaccharide-protein conjugates of Vi negative S. Typhi as potential vaccine candidates. Four different conjugates were synthesized using recombinant exoprotein A of Pseudomonas aeruginosa (rEPA) and human serum albumin (HSA) as the carrier proteins, using either direct reductive amination or an intermediate linker molecule, adipic acid dihydrazide (ADH)...
July 21, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28731899/current-perspectives-on-invasive-nontyphoidal-salmonella-disease
#16
Andrea H Haselbeck, Ursula Panzner, Justin Im, Stephen Baker, Christian G Meyer, Florian Marks
PURPOSE OF REVIEW: We searched PubMed for scientific literature published in the past 2 years for relevant information regarding the burden of invasive nontyphoidal Salmonella disease and host factors associated with nontyphoidal Salmonella infection and discuss current knowledge on vaccine development. The following search terms were used: Salmonella, non typhoidal/nontyphoidal, NTS, disease, bloodstream infection, invasive, sepsis/septicaemia/septicemia, bacteraemia/bacteremia, gastroenteritis, incidence, prevalence, morbidity, mortality, case fatality, host/risk factor, vaccination, and prevention/control...
October 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28727726/a-cross-sectional-seroepidemiological-survey-of-typhoid-fever-in-fiji
#17
Conall H Watson, Stephen Baker, Colleen L Lau, Kitione Rawalai, Mere Taufa, Jerimaia Coriakula, Nga Tran Vu Thieu, Tan Trinh Van, Dung Tran Thi Ngoc, Niel Hens, John H Lowry, Ruklanthi de Alwis, Jorge Cano, Kylie Jenkins, E Kim Mulholland, Eric J Nilles, Mike Kama, W John Edmunds
Fiji, an upper-middle income state in the Pacific Ocean, has experienced an increase in confirmed case notifications of enteric fever caused by Salmonella enterica serovar Typhi (S. Typhi). To characterize the epidemiology of typhoid exposure, we conducted a cross-sectional sero-epidemiological survey measuring IgG against the Vi antigen of S. Typhi to estimate the effect of age, ethnicity, and other variables on seroprevalence. Epidemiologically relevant cut-off titres were established using a mixed model analysis of data from recovering culture-confirmed typhoid cases...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28720030/rose-spots-following-oral-typhoid-vaccine
#18
Kelly O'Connor, Russell W Steele
No abstract text is available yet for this article.
August 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28719502/safety-of-quadrivalent-meningococcal-conjugate-vaccine-in-children-2-10-years
#19
Sara Y Tartof, Lina S Sy, Bradley K Ackerson, Rulin C Hechter, Mendel Haag, Jeffrey M Slezak, Yi Luo, Christine A Fischetti, Harp S Takhar, Yan Miao, Zendi Solano, Steven J Jacobsen, Hung-Fu Tseng
BACKGROUND: Quadrivalent meningococcal conjugate vaccine is recommended for children, adolescents, and adults at increased risk of meningococcal disease. In 2011, MenACWY-CRM (Menveo, GSK) was approved for children aged 2-10 years in the U.S. Although no safety concerns arose from clinical trials, it remains important to monitor its safety in routine clinical settings. METHODS: Kaiser Permanente Southern California members 2-10 years old who received MenACWY-CRM between September 2011 and September 2014 were included...
July 14, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28692655/population-based-incidence-seasonality-and-serotype-distribution-of-invasive-salmonellosis-among-children-in-nanoro-rural-burkina-faso
#20
Issa Guiraud, Annelies Post, Seydou Nakanabo Diallo, Palpouguini Lompo, Jessica Maltha, Kamala Thriemer, Christian Marc Tahita, Benedikt Ley, Karim Derra, Emmanuel Bottieau, Adama Kazienga, Céline Schurmans, Raffaella Ravinetto, Eli Rouamba, Johan Van Griensven, Sophie Bertrand, Halidou Tinto, Jan Jacobs
BACKGROUND: Bloodstream infections (BSI) caused by Salmonella Typhi and invasive non-Typhoidal Salmonella (iNTS) frequently affect children living in rural sub-Saharan Africa but data about incidence and serotype distribution are rare. OBJECTIVE: The present study assessed the population-based incidence of Salmonella BSI and severe malaria in a Health and Demographic Surveillance System in a rural area with seasonal malaria transmission in Nanoro, Burkina Faso. METHODS: Children between 2 months-15 years old with severe febrile illness were enrolled during a one-year surveillance period (May 2013-May 2014)...
2017: PloS One
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