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Resultados  1-12 de 234

Influenza A(H1N1)pdm09 resistance and cross-decreased susceptibility to oseltamivir and zanamivir antiviral drugs.

Autor(es): Correia V; Santos LA; Gíria M; Almeida-Santos MM; Rebelo-de-Andrade H
Fuente: J Med Virol;87(1): 45-56, 2015 Jan.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 25042157
Resumen: Neuraminidase inhibitors (NAIs) oseltamivir and zanamivir are currently the only effective antiviral drugs available worldwide for the management of influenza. The potential development of resistance is continually threatening their use, rationalizing and highlighting the need for a close and sustained evaluation of virus susceptibility. This study aimed to analyze and characterize the phenotypic and genotypic NAIs susceptibility profiles of A(H1N1)pdm09 viruses circulating in Portugal from (mas)

Antiviral activity of baicalin against influenza A (H1N1/H3N2) virus in cell culture and in mice and its inhibition of neuraminidase.

Autor(es): Ding Y; Dou J; Teng Z; Yu J; Wang T; Lu N; Wang H; Zhou C
Fuente: Arch Virol;159(12): 3269-78, 2014 Dec.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 25078390
Resumen: Scutellaria baicalensis Georgi, a Chinese herbal decoction, has been used for the treatment of the common cold, fever and influenza virus infections. In previous studies, we found that oral administration of baicalein resulted in the inhibition of influenza A virus replication in vivo, which was linked to baicalin in serum. However, the effective dose and underlying mechanisms of the efficacy of baicalin against influenza A virus have not been fully elucidated. In this study, the antiviral (mas)

Antiviral activity of Basidiomycete mycelia against influenza type A (serotype H1N1) and herpes simplex virus type 2 in cell culture.

Autor(es): Krupodorova T; Rybalko S; Barshteyn V
Fuente: Virol Sin;29(5): 284-90, 2014 Oct.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 25358999
Resumen: In this study, we investigated the in vitro antiviral activity of the mycelia of higher mushrooms against influenza virus type A (serotype H1N1) and herpes simplex virus type 2 (HSV-2), strain BH. All 10 investigated mushroom species inhibited the reproduction of influenza virus strain A/FM/1/47 (H1N1) in MDCK cells reducing the infectious titer by 2.0-6.0 lg ID50. Four species, Pleurotus ostreatus, Fomes fomentarius, Auriporia aurea, and Trametes versicolor, were also determined to be effe (mas)

Antiviral drug profile of human influenza A & B viruses circulating in India: 2004-2011.

Autor(es): Potdar VA; Dakhave MR; Kulkarni PB; Tikhe SA; Broor S; Gunashekaran P; Chawla-Sarkar M; Abraham A; Bishwas D; Patil KN; Kadam AA; Kode SS; Mishra AC; Chadha MS
Fuente: Indian J Med Res;140(2): 244-51, 2014 Aug.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 25297358
Resumen: BACKGROUND & OBJECTIVES: Recent influenza antiviral resistance studies in South East Asia, Europe and the United States reveal adamantane and neuraminidase inhibitor (NAIs) resistance. This study was undertaken to evaluate antiviral resistance in influenza viruses isolated from various parts of India, during 2004 to 2011. METHODS: Influenza viruses were analyzed genetically for known resistance markers by M2 and NA gene sequencing. Influenza A/H1N1 (n=206), A/H3N2 (n=371) viruses for amanta (mas)

The relationship between in vivo antiviral activity and pharmacokinetic parameters of peramivir in influenza virus infection model in mice.

Autor(es): Kodama M; Yoshida R; Hasegawa T; Izawa M; Kitano M; Baba K; Noshi T; Seki T; Okazaki K; Tsuji M; Kanazu T; Kamimori H; Homma T; Kobayashi M; Sakoda Y; Kida H; Sato A; Yamano Y
Fuente: Antiviral Res;109: 110-5, 2014 Sep.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24997412
Resumen: The purpose of this study was to investigate the relationship between pharmacokinetic (PK) parameters of intravenous (IV) peramivir and in vivo antiviral activity pharmacodynamic (PD) outcomes in a mouse model of influenza virus infection. Peramivir was administrated to mice in three dosing schedules; once, twice and four times after infection of A/WS/33 (H1N1). The survival rate at day 14 after virus infection was employed as the antiviral activity outcome for analysis. The relationship be (mas)

[The antiviral activity of the adamantane derivatives against the influenza virus A (H1N1) pdm2009 model in vivo].

Autor(es): Shchelkanov MIu; Shibnev VA; Finogenova IT; Fediakina TM; Garaev TM; Markova NV; Kirillov IM
Fuente: Vopr Virusol;59(2): 37-40, 2014 Mar-Apr.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 25069284
Resumen: For the first time in vivo, the model of the viral pneumonia in mice was used to study the antiviral activity against influenza A virus (H1N1) pdm09 synthetic derivatives of adamantane series including the amino acid residues and lipoid acid. It was found that the adamantane derivatives with histidine, serine, and lipoid acid could inhibit the rimantadine-resistant strain of the influenza A (H1N1) pdm09. As a result, the lifespan of the mice infected with the virus has increased by 1.6 time (mas)

Effect of rapid influenza diagnostic testing on antiviral treatment decisions for patients with influenza-like illness: southwestern U.S., May-December 2009.

Autor(es): Suryaprasad A; Redd JT; Ricks PM; Podewils LJ; Brett M; Oski J; Minenna W; Armao F; Vize BJ; Cheek JE
Fuente: Public Health Rep;129(4): 322-7, 2014 Jul-Aug.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24982534
Resumen: Rapid influenza diagnostic tests (RIDTs) had low test sensitivity for detecting 2009 pandemic influenza A (H1N1pdm09) infection, causing public health authorities to recommend that treatment decisions be based primarily upon risk for influenza complications. We used multivariate Poisson regression analysis to estimate the contribution of RIDT results and risk for H1N1pdm09 complications to receipt of early antiviral (AV) treatment among 290 people with influenza-like illness (ILI) who recei (mas)

Mutations flanking the carbohydrate binding site of surfactant protein D confer antiviral activity for pandemic influenza A viruses.

Autor(es): Nikolaidis NM; White MR; Allen K; Tripathi S; Qi L; McDonald B; Taubenberger J; Seaton BA; McCormack FX; Crouch EC; Hartshorn KL
Fuente: Am J Physiol Lung Cell Mol Physiol;306(11): L1036-44, 2014 Jun 1.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24705721
Resumen: We recently reported that a trimeric neck and carbohydrate recognition domain (NCRD) fragment of human surfactant protein D (SP-D), a host defense lectin, with combinatorial substitutions at the 325 and 343 positions (D325A+R343V) exhibits markedly increased antiviral activity for seasonal strains of influenza A virus (IAV). The NCRD binds to glycan-rich viral envelope proteins including hemagglutinin (HA). We now show that replacement of D325 with serine to create D325S+R343V provided equa (mas)

Antiviral activity of Ladania067, an extract from wild black currant leaves against influenza A virus in vitro and in vivo.

Autor(es): Haasbach E; Hartmayer C; Hettler A; Sarnecka A; Wulle U; Ehrhardt C; Ludwig S; Planz O
Fuente: Front Microbiol;5: 171, 2014.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24795704
Resumen: Influenza, a respiratory disease caused by influenza viruses, still represents a major threat to humans and several animal species. Besides vaccination, only two classes of drugs are available for antiviral treatment against this pathogen. Thus, there is a strong need for new effective antivirals against influenza viruses. Here, we tested Ladania067, an extract from the leaves of the wild black currant (Ribes nigrum folium) for potential antiviral activity against influenza A virus in vitro (mas)

Mucosal reactive oxygen species are required for antiviral response: role of Duox in influenza a virus infection.

Autor(es): Strengert M; Jennings R; Davanture S; Hayes P; Gabriel G; Knaus UG
Fuente: Antioxid Redox Signal;20(17): 2695-709, 2014 Jun 10.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24128054
Resumen: AIMS: Influenza A virus (IAV), a major airborne pathogen, is closely associated with significant morbidity and mortality. The primary target for influenza virus replication is the respiratory epithelium, which reacts to infection by mounting a multifaceted antiviral response. A part of this mucosal host defense is the generation of reactive oxygen species (ROS) by NADPH oxidases. Duox1 and Duox2 are the main ROS-producing enzymes in the airway epithelium, but their contribution to mammalian (mas)

A Review of the Antiviral Susceptibility of Human and Avian Influenza Viruses over the Last Decade.

Autor(es): Oh DY; Hurt AC
Fuente: Scientifica (Cairo);2014: 430629, 2014.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24800107
Resumen: Antivirals play an important role in the prevention and treatment of influenza infections, particularly in high-risk or severely ill patients. Two classes of influenza antivirals have been available in many countries over the last decade (2004-2013), the adamantanes and the neuraminidase inhibitors (NAIs). During this period, widespread adamantane resistance has developed in circulating influenza viruses rendering these drugs useless, resulting in the reliance on the most widely available N (mas)

Antiviral activity of 3,4'-dihydroxyflavone on influenza a virus.

Autor(es): Hossain MK; Choi HY; Hwang JS; Dayem AA; Kim JH; Kim YB; Poo H; Cho SG
Fuente: J Microbiol;52(6): 521-6, 2014 Jun.
MEDLINE - Literatura Internacional en Ciencias de la Salud PMID: 24871979
Resumen: Influenza virus infection causes thousands of deaths and millions of hospitalizations worldwide every year and the emergence of resistance to anti-influenza drugs has prompted scientists to seek new natural antiviral materials. In this study, we screened 13 different flavonoids from various flavonoid groups to identify the most potent antiviral flavonoid against human influenza A/PR/8/34 (H1N1). The 3-hydroxyl group flavonoids, including 3,2᾿dihydroxyflavone (3,2᾿DHF) and 3,4ᾠ(mas)
Resultados  1-12 de 234