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https://www.readbyqxmd.com/read/28934770/seasonal-influenza-and-vaccination-strategies-is-a-paradigm-shift-needed-a-synopsis-of-the-3rd-new-zealand-influenza-symposium-november-2016
#1
Nadia A Charania, Diana Murfitt, Nikki Turner
Influenza continues to be a global public health problem despite the availability of preventive vaccines and public health vaccination programmes. This paper presents a synopsis of the 3rd New Zealand Influenza Symposium (NZiS) that was hosted by the Immunisation Advisory Centre (IMAC) in November 2016. Experts and service providers convened to discuss current issues in the prevention and management of influenza. One of the key topics discussed was the use of novel vaccines, such as adjuvanted and high-dose vaccines, and antiviral prophylaxis to protect young children and the elderly...
September 22, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28934463/the-global-threat-of-animal-influenza-viruses-of-zoonotic-concern-then-and-now
#2
Marc-Alain Widdowson, Joseph S Bresee, Daniel B Jernigan
Animal influenza viruses can reassort or mutate to infect and spread sustainably among people and cause a devastating worldwide pandemic. Since the first evidence of human infection with an animal influenza virus, in 1958, 16 different novel, zoonotic influenza A virus subtype groups in 29 countries, Taiwan, and Hong Kong have caused human infections, with differing severity and frequency. The frequency of novel influenza virus detection is increasing, and human infections with influenza A(H5N1) and A(H7N9) viruses are now annual seasonal occurrences in Asia...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934462/clusters-of-human-infections-with-avian-influenza-a-h7n9-virus-in-china-march-2013-to-june-2015
#3
Bo Liu, Fiona P Havers, Lei Zhou, Haojie Zhong, Xianjun Wang, Shenghua Mao, Hai Li, Ruiqi Ren, Nijuan Xiang, Yuelong Shu, Suizan Zhou, Fuqiang Liu, Enfu Chen, Yanping Zhang, Marc-Alain Widdowson, Qun Li, Zijian Feng
Multiple clusters of human infections with novel avian influenza A(H7N9) virus have occurred since the virus was first identified in spring 2013. However, in many situations it is unclear whether these clusters result from person-to-person transmission or exposure to a common infectious source. We analyzed the possibility of person-to-person transmission in each cluster and developed a framework to assess the likelihood that person-to-person transmission had occurred. We described 21 clusters with 22 infected contact cases that were identified by the Chinese Center for Disease Control and Prevention from March 2013 through June 2015...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934461/effect-of-priming-with-seasonal-influenza-a-h3n2-virus-on-the-prevalence-of-cross-reactive-hemagglutination-inhibition-antibodies-to-swine-origin-a-h3n2-variants
#4
Feng Liu, Vic Veguilla, F Liaini Gross, Eric Gillis, Thomas Rowe, Xiyan Xu, Terrence M Tumpey, Jacqueline M Katz, Min Z Levine, Xiuhua Lu
Background: Recent outbreaks of swine-origin influenza A(H3N2) variant (H3N2v) viruses have raised public health concerns. Previous studies indicated that older children and young adults had the highest levels of hemagglutination-inhibition (HI) antibodies to 2010-2011 H3N2v viruses. However, newly emerging 2013 H3N2v have acquired antigenic mutations in the hemagglutinin at amino acid position 145 (N145K/R). We estimated the levels of serologic cross-reactivity among humans primed with seasonal influenza A(H3N2) (sH3N2), using postinfection ferret antisera...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934460/commentary-a-historical-review-of-centers-for-disease-control-and-prevention-antiviral-treatment-and-postexposure-chemoprophylaxis-guidance-for-human-infections-with-novel-influenza-a-viruses-associated-with-severe-human-disease
#5
Fiona P Havers, Angela P Campbell, Timothy M Uyeki, Alicia M Fry
Human infections with novel influenza A viruses are of global public health concern, and antiviral medications have a potentially important role in treatment and prevention of human illness. Initial guidance was developed by the U.S. Centers for Disease Control and Prevention after the emergence of human infections with avian influenza A(H5N1) and has evolved over time, with identification of influenza A(H7N9) virus infections in humans, as well as detection of avian influenza viruses in birds in the United States...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934459/mild-respiratory-illness-among-young-children-caused-by-highly-pathogenic-avian-influenza-a-h5n1-virus-infection-in-dhaka-bangladesh-2011
#6
Apurba Chakraborty, Mahmudur Rahman, M Jahangir Hossain, Salah Uddin Khan, M Sabbir Haider, Rebeca Sultana, Nadia Ali Rimi, M Saiful Islam, Najmul Haider, Ausraful Islam, Ireen Sultana Shanta, Tahmina Sultana, Abdullah Al Mamun, Nusrat Homaira, Doli Goswami, Kamrun Nahar, A S M Alamgir, Mustafizur Rahman, Khondokar Mahbuba Jamil, Eduardo Azziz-Baumgartner, Natosha Simpson, Bo Shu, Stephen Lindstrom, Nancy Gerloff, C Todd Davis, Jaqueline M Katz, Andrea Mikolon, Timothy M Uyeki, Stephen P Luby, Katharine Sturm-Ramirez
Background: In March 2011, a multidisciplinary team investigated 2 human cases of highly pathogenic avian influenza A(H5N1) virus infection, detected through population-based active surveillance for influenza in Bangladesh, to assess transmission and contain further spread. Methods: We collected clinical and exposure history of the case patients and monitored persons coming within 1 m of a case patient during their infectious period. Nasopharyngeal wash specimens from case patients and contacts were tested with real-time reverse-transcription polymerase chain reaction, and virus culture and isolates were characterized...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934458/risk-of-human-infections-with-highly-pathogenic-h5n2-and-low-pathogenic-h7n1-avian-influenza-strains-during-outbreaks-in-ostriches-in-south-africa
#7
Marietjie Venter, Florette K Treurnicht, Amelia Buys, Stefano Tempia, Rudo Samudzi, Johanna McAnerney, Charlene A Jacobs, Juno Thomas, Lucille Blumberg
Background: Risk factors for human infection with highly pathogenic (HP) and low-pathogenic (LP) avian influenza (AI) H5N2 and H7N1 were investigated during outbreaks in ostriches in the Western Cape province, South Africa. Methods: Serum surveys were conducted for veterinarians, farmworkers, and laboratory and abattoir workers involved in 2 AI outbreaks in the Western Cape province: (1) controlling and culling of 42000 ostriches during (HPAI)H5N2 outbreaks in ostriches (2011) (n = 207); (2) movement control during (LPAI)H7N1 outbreaks in 2012 (n = 66)...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934457/highly-pathogenic-avian-influenza-a-h5n1-viruses-at-the-animal-human-interface-in-vietnam-2003-2010
#8
Adrian Creanga, Nguyen Le Khanh Hang, Vuong Duc Cuong, Ha T Nguyen, Hoang Vu Mai Phuong, Le Thi Thanh, Nguyen Co Thach, Pham Thi Hien, Nguyen Tung, Yunho Jang, Amanda Balish, Nguyen Hoang Dang, Mai Thuy Duong, Ngo Thu Huong, Do Ngoc Hoa, Nguyen Dang Tho, Alexander Klimov, Bryan K Kapella, Larisa Gubareva, James C Kile, Nguyen Tran Hien, Le Quynh Mai, C Todd Davis
Mutation and reassortment of highly pathogenic avian influenza A(H5N1) viruses at the animal-human interface remain a major concern for emergence of viruses with pandemic potential. To understand the relationship of H5N1 viruses circulating in poultry and those isolated from humans, comprehensive phylogenetic and molecular analyses of viruses collected from both hosts in Vietnam between 2003 and 2010 were performed. We examined the temporal and spatial distribution of human cases relative to H5N1 poultry outbreaks and characterized the genetic lineages and amino acid substitutions in each gene segment identified in humans relative to closely related viruses from avian hosts...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934456/cross-reactive-antibody-responses-to-novel-h5nx-influenza-viruses-following-homologous-and-heterologous-prime-boost-vaccination-with-a-prepandemic-stockpiled-a-h5n1-vaccine-in-humans
#9
Min Z Levine, Crystal Holiday, Feng Liu, Stacie Jefferson, Eric Gillis, Abbie R Bellamy, Terrence Tumpey, Jacqueline M Katz
Recently, novel highly pathogenic avian influenza H5Nx viruses (clade 2.3.4.4) caused outbreaks in US poultry. We evaluated the potential of a stockpiled A(H5N1) A/Anhui/1/2005 (clade 2.3.4) vaccine to elicit cross-reactive antibody responses to these emerging viruses. Sera from subjects who received 2 doses of MF59-adjuvanted A/Anhui/1/2005, or 1 dose of MF59-adjuvanted A/Anhui/1/2005 following priming with a clade 1 vaccine were characterized by microneutralization assays and modified hemagglutination inhibition (HI) assays...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934455/drug-susceptibility-evaluation-of-an-influenza-a-h7n9-virus-by-analyzing-recombinant-neuraminidase-proteins
#10
Larisa V Gubareva, Katrina Sleeman, Zhu Guo, Hua Yang, Erin Hodges, Charles T Davis, Tatiana Baranovich, James Stevens
Background: Neuraminidase (NA) inhibitors are the recommended antiviral medications for influenza treatment. However, their therapeutic efficacy can be compromised by NA changes that emerge naturally and/or following antiviral treatment. Knowledge of which molecular changes confer drug resistance of influenza A(H7N9) viruses (group 2NA) remains sparse. Methods: Fourteen amino acid substitutions were introduced into the NA of A/Shanghai/2/2013(H7N9). Recombinant N9 (recN9) proteins were expressed in a baculovirus system in insect cells and tested using the Centers for Disease Control and Prevention standardized NA inhibition (NI) assay with oseltamivir, zanamivir, peramivir, and laninamivir...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934454/assessment-of-molecular-antigenic-and-pathological-features-of-canine-influenza-a-h3n2-viruses-that-emerged-in-the-united-states
#11
Joanna A Pulit-Penaloza, Natosha Simpson, Hua Yang, Hannah M Creager, Joyce Jones, Paul Carney, Jessica A Belser, Genyan Yang, Jessie Chang, Hui Zeng, Sharmi Thor, Yunho Jang, Mary Lea Killian, Melinda Jenkins-Moore, Alicia Janas-Martindale, Edward Dubovi, David E Wentworth, James Stevens, Terrence M Tumpey, C Todd Davis, Taronna R Maines
Background: A single subtype of canine influenza virus (CIV), A(H3N8), was circulating in the United States until a new subtype, A(H3N2), was detected in Illinois in spring 2015. Since then, this CIV has caused thousands of infections in dogs in multiple states. Methods: In this study, genetic and antigenic properties of the new CIV were evaluated. In addition, structural and glycan array binding features of the recombinant hemagglutinin were determined. Replication kinetics in human airway cells and pathogenesis and transmissibility in animal models were also assessed...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934453/an-adjuvanted-a-h5n1-subvirion-vaccine-elicits-virus-specific-antibody-response-and-improves-protection-against-lethal-influenza-viral-challenge-in-mouse-model-of-protein-energy-malnutrition
#12
Enitra N Jones, Samuel Amoah, Weiping Cao, Suryaprakash Sambhara, Shivaprakash Gangappa
Background: Protein energy malnutrition (PEM) increases susceptibility to infectious diseases, including influenza infection, but no studies have addressed the potential influences of PEM on the immunogenicity and protective efficacy of avian influenza A(H5N1) vaccine. Methods: We investigated the role of PEM on vaccine-mediated protection after a lethal challenge with recombinant A(H5N1) virus using isocaloric diets providing either adequate protein (AP; 18% protein) or very low protein (VLP; 2% protein) in an established murine model of influenza vaccination...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934452/pathogenesis-transmissibility-and-tropism-of-a-highly-pathogenic-avian-influenza-a-h7n7-virus-associated-with-human-conjunctivitis-in-italy-2013
#13
Jessica A Belser, Hannah M Creager, Hui Zeng, Taronna R Maines, Terrence M Tumpey
H7 subtype influenza viruses represent a persistent public health threat because of their continued detection in poultry and ability to cause human infection. An outbreak of highly pathogenic avian influenza H7N7 virus in Italy during 2013 resulted in 3 cases of human conjunctivitis. We determined the pathogenicity and transmissibility of influenza A/Italy/3/2013 virus in mouse and ferret models and examined the replication kinetics of this virus in several human epithelial cell types. The moderate virulence observed in mammalian models and the capacity for transmission in a direct contact model underscore the need for continued study of H7 subtype viruses...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934439/age-related-differences-in-influenza-b-infection-by-lineage-in-a-community-based-sentinel-system-2010-2011-to-2015-2016-canada
#14
Danuta M Skowronski, Catharine Chambers, Gaston De Serres, Suzana Sabaiduc, Anne-Luise Winter, James A Dickinson, Jonathan B Gubbay, Kevin Fonseca, Steven J Drews, Hugues Charest, Christine Martineau, Mel Krajden, Martin Petric, Nathalie Bastien, Yan Li
Age-related differences in influenza B lineage detection were explored in the community-based Canadian Sentinel Practitioner Surveillance Network (SPSN) from 2010-2011 to 2015-2016. Whereas >80% of B(Victoria) cases were <40 years old, B(Yamagata) cases showed a bimodal age distribution with 27% who were <20 years old and 61% who were 30-64 years old, but with a notable gap in cases between 20 and 29 years old (4%). Overall, the median age was 20 years lower for B(Victoria) vs B(Yamagata) cases (20 vs 40 years; P < ...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934370/the-risk-of-sustained-sexual-transmission-of-zika-is-underestimated
#15
Antoine Allard, Benjamin M Althouse, Laurent Hébert-Dufresne, Samuel V Scarpino
Pathogens often follow more than one transmission route during outbreaks-from needle sharing plus sexual transmission of HIV to small droplet aerosol plus fomite transmission of influenza. Thus, controlling an infectious disease outbreak often requires characterizing the risk associated with multiple mechanisms of transmission. For example, during the Ebola virus outbreak in West Africa, weighing the relative importance of funeral versus health care worker transmission was essential to stopping disease spread...
September 21, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28934167/live-attenuated-influenza-vaccine-contains-substantial-and-unexpected-amounts-of-defective-viral-genomic-rna
#16
Philip S Gould, Andrew J Easton, Nigel J Dimmock
The live attenuated influenza vaccine FluMist(®) was withdrawn in the USA by the Centers for Disease Control and Prevention after its failure to provide adequate protective immunity during 2013-2016. The vaccine uses attenuated core type A and type B viruses, reconfigured each year to express the two major surface antigens of the currently circulating viruses. Here Fluenz™ Tetra, the European version of this vaccine, was examined directly for defective-interfering (DI) viral RNAs. DI RNAs are deleted versions of the infectious virus genome, and have powerful biological properties including attenuation of infection, reduction of infectious virus yield, and stimulation of some immune responses...
September 21, 2017: Viruses
https://www.readbyqxmd.com/read/28933668/nasal-aluminum-oxy-hydroxide-enables-adsorbed-antigens-to-induce-specific-systemic-and-mucosal-immune-responses
#17
Haiyue Xu, Tinashe B Ruwona, Sachin G Thakkar, Yanping Chen, Mingtao Zeng, Zhengrong Cui
Some insoluble aluminum salts are commonly used in injectable vaccines as adjuvants to accelerate, prolong, or enhance the antigen-specific immune responses. Data from previous studies testing the nasal mucosal vaccine adjuvant activity of aluminum salts are conflicting. The present study is designed to further assess the feasibility of repurposing aluminum salts in injectable vaccines as nasal mucosal vaccine adjuvants. Using Alhydrogel®, the international scientific standard of aluminum (oxy)hydroxide gels, and ovalbumin or 3 × M2e-HA2, a synthetic influenza virus fusion protein, as antigens, we showed in a mouse model that when dosed intranasally Alhydrogel® enables antigens adsorbed on it to induce stronger antigen-specific immune responses in both serum samples (e...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28933664/immune-responses-after-live-attenuated-influenza-vaccination
#18
Kristin G-I Mohn, Ingrid Smith, Haakon Sjursen, Rebecca Cox
Since 2003 (US) and 2012 (Europe) the live attenuated influenza vaccine (LAIV) has been used as an alternative to the traditional inactivated influenza vaccines (IIV). The immune responses elicted by LAIV mimic natural infection and have been found to provide broader clinical protection in children compared to the IIVs. However, our knowledge of the detailed immunological mechanisims induced by LAIV remain to be fully elucidated, and despite 14 years on the global market, there exists no correlate of protection...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28933626/immunogenicity-and-safety-of-the-2015-southern-hemisphere-formulation-of-a-split-virion-inactivated-quadrivalent-vaccine
#19
Cecilia Montalban, May Book Montellano, Jaime Santos, Nathalie Lavis
An inactivated split-virion quadrivalent influenza vaccine (IIV4; Fluzone® Quadrivalent; Sanofi Pasteur) has been available in the US since 2013 and in the Southern Hemisphere since 2015. Here, we describe the results of an open-label, post-licensure trial (WHO Universal Trial Number, U1111-1143-9256) to confirm the immunogenicity and safety of the Southern Hemisphere 2015 formulation of IIV4. Adults 18-60 years of age and > 60 years of age (n = 60 per age group) received a single 0.5-mL intramuscular injection of IIV4...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28933625/immunogenicity-and-safety-of-a-split-virion-quadrivalent-influenza-vaccine-in-adults-18-60%C3%A2-years-of-age-in-the-republic-of-korea
#20
Won Suk Choi, Ji Yun Noh, Jacob Lee, Jun Yong Choi, Jin-Soo Lee, Moo Soo Kim, Hee Soo Kim, Joon Bang, Nathalie Lavis, Woo Joo Kim
VaxigripTetra® (Sanofi Pasteur, Lyon, France) is a quadrivalent split-virion inactivated influenza vaccine (IIV4) containing two B-lineage strains approved in the European Union and Taiwan in 2016 for individuals ≥ 3 years of age. Here, we describe an observer-blind, randomized, controlled, multicenter trial study evaluating the immunogenicity and safety of the Northern Hemisphere 2015-2016 formulations of IIV4 and the licensed split-virion trivalent inactivated influenza vaccine (IIV3) in the Republic of Korea (ClinicalTrials...
September 21, 2017: Human Vaccines & Immunotherapeutics
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