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Pesquisa | Influenza A (H1N1)

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Resultados  1-12 de 97
1.

Reviewing the History of Pandemic Influenza: Understanding Patterns of Emergence and Transmission.

Autor(es): Saunders-Hastings, Patrick R; Krewski, Daniel
Fonte: Pathogens;5(4)2016 Dec 06.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27929449
Resumo: For centuries, novel strains of influenza have emerged to produce human pandemics, causing widespread illness, death, and disruption. There have been four influenza pandemics in the past hundred years. During this time, globalization processes, alongside advances in medicine and epidemiology, have altered the way these pandemics are experienced. Drawing on international case studies, this paper provides a review of the impact of past influenza pandemics, while examining the evolution of our (mais)
2.

Influenza Pandemics and Tuberculosis Mortality in 1889 and 1918: Analysis of Historical Data from Switzerland.

Autor(es): Zürcher, Kathrin; Zwahlen, Marcel; Ballif, Marie; Rieder, Hans L; Egger, Matthias; Fenner, Lukas
Fonte: PLoS One;11(10): e0162575, 2016.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27706149
Resumo: BACKGROUND: Tuberculosis (TB) mortality declined in the northern hemisphere over the last 200 years, but peaked during the Russian (1889) and the Spanish (1918) influenza pandemics. We studied the impact of these two pandemics on TB mortality. METHODS: We retrieved historic data from mortality registers for the city of Bern and countrywide for Switzerland. We used Poisson regression models to quantify the excess pulmonary TB (PTB) mortality attributable to influenza. RESULTS: Yearly PTB mor (mais)
3.

Dynamic Convergent Evolution Drives the Passage Adaptation across 48 Years' History of H3N2 Influenza Evolution.

Autor(es): Chen, Hui; Deng, Qiang; Ng, Sock Hoon; Lee, Raphael Tze Chuen; Maurer-Stroh, Sebastian; Zhai, Weiwei
Fonte: Mol Biol Evol;33(12): 3133-3143, 2016 Dec.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27604224
Resumo: Influenza viruses are often propagated in a diverse set of culturing media and additional substitutions known as passage adaptation can cause extra evolution in the target strain, leading to ineffective vaccines. Using 25,482 H3N2 HA1 sequences curated from Global Initiative on Sharing All Influenza Data and National Center for Biotechnology Information databases, we found that passage adaptation is a very dynamic process that changes over time and evolves in a seesaw like pattern. After cr (mais)
5.

A Role of Influenza Virus Exposure History in Determining Pandemic Susceptibility and CD8+ T Cell Responses.

Autor(es): Quiñones-Parra, Sergio M; Clemens, E Bridie; Wang, Zhongfang; Croom, Hayley A; Kedzierski, Lukasz; McVernon, Jodie; Vijaykrishna, Dhanasekaran; Kedzierska, Katherine
Fonte: J Virol;90(15): 6936-47, 2016 Aug 01.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27226365
Resumo: UNLABELLED: Novel influenza viruses often cause differential infection patterns across different age groups, an effect that is defined as heterogeneous demographic susceptibility. This occurred during the A/H2N2 pandemic, when children experienced higher influenza attack rates than adults. Since the recognition of conserved epitopes across influenza subtypes by CD8(+) cytotoxic T lymphocytes (CTLs) limit influenza disease, we hypothesized that conservation of CTL antigenic peptides (Ag-p) i (mais)
7.

Historical and Recent Cases of H3 Influenza A Virus in Turkeys in Minnesota.

Autor(es): Guo, Xi; Flores, Cristian; Munoz-Aguayo, Jeannette; Halvorson, David A; Lauer, Dale; Cardona, Carol J
Fonte: Avian Dis;60(1 Suppl): 408, 2016 May.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27309087
Resumo: Subtype H3 influenza A viruses (IAVs) are abundant in wild waterfowl and also infect humans, pigs, horses, dogs, and seals. In Minnesota, turkeys are important and frequent hosts of IAV from wild waterfowl and from pigs. Over 48 yr of surveillance history, 11 hemagglutinin (HA) subtypes of IAV from waterfowl, as well as two HA subtypes from swine, H1 and H3, have infected turkeys in Minnesota. However, there have only been two cases of avian-origin H3 IAV infections in turkeys during this 4 (mais)
8.

Available influenza vaccines: immunization strategies, history and new tools for fighting the disease.

Autor(es): Barberis, I; Martini, M; Iavarone, F; Orsi, A
Fonte: J Prev Med Hyg;57(1): E41-6, 2016.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27346939
Resumo: The main public health strategy for containing influenza-related disease is annual vaccination, which is recommended for the elderly and others belonging to risk-factor categories, who present the highest morbidity and mortality, as reported by the World Health Organization (WHO) Recommendations. The availability of different influenza vaccine formulations makes the choice of the best immunization strategy a challenge for stakeholders and public health experts. Heterogeneity in at-risk cate (mais)
9.

A Tale of Many Cities: A Contemporary Historical Study of the Implementation of School Closures during the 2009 pA(H1N1) Influenza Pandemic.

Autor(es): Navarro, J Alexander; Kohl, Katrin S; Cetron, Martin S; Markel, Howard
Fonte: J Health Polit Policy Law;41(3): 393-421, 2016 Jun.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 26921384
Resumo: Applying qualitative historical methods, we examined the consideration and implementation of school closures as a nonpharmaceutical intervention (NPI) in thirty US cities during the spring 2009 wave of the pA(H1N1) influenza pandemic. We gathered and performed close textual readings of official federal, state, and municipal government documents; media coverage; and academic publications. Lastly, we conducted oral history interviews with public health and education officials in our selected (mais)
10.

Humoral response to influenza vaccination in relation to pre-vaccination antibody titres, vaccination history, cytomegalovirus serostatus and CD4/CD8 ratio.

Autor(es): Strindhall, Jan; Ernerudh, Jan; Mörner, Andreas; Waalen, Kristian; Löfgren, Sture; Matussek, Andreas; Bengner, Malin
Fonte: Infect Dis (Lond);48(6): 436-42, 2016.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 27030916
Resumo: BACKGROUND: Annual vaccination against influenza virus is generally recommended to elderly and chronically ill, but the relative importance of factors influencing the outcome is not fully understood. METHODS: In this study of 88 individuals all aged 69 years, the increase in haemagglutinin-inhibiting (HI) antibodies to trivalent inactivated influenza vaccine was correlated with HI titres before vaccination, prior vaccinations against influenza, cytomegalovirus serostatus and, as an estimate (mais)
12.

Overcrowding and Mortality During the Influenza Pandemic of 1918.

Autor(es): Aligne, C Andrew
Fonte: Am J Public Health;106(4): 642-4, 2016 Apr.
MEDLINE - Literatura Internacional em Ciências da Saúde PMID: 26959269
Resumo: The influenza pandemic of 1918 killed more than 50 million people. Why was 1918 such an outlier? I. W. Brewer, a US Army physician at Camp Humphreys, Virginia, during the First World War, investigated several factors suspected of increasing the risk of severe flu: length of service in the army, race, dirty dishes, flies, dust, crowding, and weather. Overcrowding stood out, increasing the risk of flu 10-fold and the risk of flu complicated with pneumonia five-fold. Calculations made with Bre (mais)
Resultados  1-12 de 97