نتایج جستجو برای: influenza viruses type a
تعداد نتایج: 13724317 فیلتر نتایج به سال:
Influenza activity in the United States was low during October 2017, but has been increasing since the beginning of November. Influenza A viruses have been most commonly identified, with influenza A(H3N2) viruses predominating. Several influenza activity indicators were higher than is typically seen for this time of year. The majority of influenza viruses characterized during this period were g...
BACKGROUND The performance of rapid influenza diagnostic tests (RIDTs) that detect influenza viral nucleoprotein (NP) antigen has been reported to be variable. Recent human infections with variant influenza A viruses that are circulating in pigs prompted the investigation of the analytical reactivity of RIDTs with these variant viruses. OBJECTIVES To determine analytical reactivity of seven F...
background:influenza virus is globally pathogenic and it is usually associated with zoonotic respiratory diseases. this virus has caused a number of pandemics with a high mortality rate. the non-structural (ns1) protein of influenza a viruses is a non-essential virulence factor that has multiple accessory functions during viral infection. this protein is highly conservative. it has been shown t...
Influenza A and B virus infections are serious public health concerns globally. However, the concerns regarding influenza B infection have been underestimated. The currently used anti-influenza drugs have not provided equal efficacy for both influenza A and B viruses. Susceptibility to neuraminidase (NA) inhibitors has been observed to be lower for influenza B viruses than for influenza A virus...
We have described a model system in which helper T cells are required to mount a primary antiviral cytolytic T lymphocyte response. The radioresistant helper cell can be found in the spleens of mice that have been immunized subcutaneously with influenza viruses 6-8 d previously. These helper cells appear to be type specific but cross-reactive among the subtypes of influenza A viruses. The pheno...
Eight cell lines were systematically compared for their permissivity to primary infection, replication, and spread of seven human influenza viruses. Cell lines were of human origin (Caco-2, A549, HEp-2, and NCI-H292), monkey (Vero, LLC-MK2), mink (Mv1 Lu), and canine (MDCK). The influenza viruses included seasonal types and subtypes and a pandemic virus. The MDCK, Caco-2, and Mv1 Lu cells were ...
COVID and H3N2 influenza instances are on ascent in India. Both COVID-19 the infectious viruses. They promulgate through droplets. is transmitted by SARs –Cov2 virus acquired Influenza A sub type. Contrast to H3N2, 19 cause more serious symptoms can take longer than flu symptoms. The not only poses a threat health of people worldwide but also affects global economy. variety that has been presen...
Type I interferon (IFN) induction is an immediate response to virus infection, and very high levels of these cytokines are produced when the Toll-like receptors (TLRs) expressed at high levels by plasmacytoid dendritic cells (pDCs) are triggered by viral nucleic acids. Unlike many RNA viruses, respiratory syncytial virus (RSV) does not appear to activate pDCs through their TLRs and it is not cl...
SARS-CoV-2 is a new virus that the cause of current COVID-19 pandemic. We currently do not have cure and immunity against this pathogen. Influenza viruses, on other hand, are constantly evolving undergo various levels antigenic drift shift will become less recognizable by our immune system. This makes it difficult to develop widespread effective influenza vaccine also poses risk pandemics leadi...
In 2009, a novel H1N1 influenza (pH1N1) virus caused the first influenza pandemic in 40 y. The virus was identified as a triple reassortant between avian, swine, and human influenza viruses, highlighting the importance of reassortment in the generation of viruses with pandemic potential. Previously, we showed that a reassortant virus composed of wild-type avian H9N2 surface genes in a seasonal ...
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