نتایج جستجو برای: influenza viruses
تعداد نتایج: 156133 فیلتر نتایج به سال:
BACKGROUND The influenza viruses circulating in animals sporadically transmit to humans and pose pandemic threats. Animal models to evaluate the potential public health risk potential of these viruses are needed. METHODOLOGY/PRINCIPAL FINDINGS We investigated the guinea pig as a mammalian model for the study of the replication and transmission characteristics of selected swine H1N1, H1N2, H3N...
Swine influenza presents a substantial disease burden for pig populations worldwide and poses a potential pandemic threat to humans. There is considerable diversity in both H1 and H3 influenza viruses circulating in swine due to the frequent introductions of viruses from humans and birds coupled with geographic segregation of global swine populations. Much of this diversity is characterized gen...
Seasonal influenza A viruses cause annual epidemics of respiratory disease; highly pathogenic avian H5N1 and the recently emerged H7N9 viruses cause severe infections in humans, often with fatal outcomes. Although numerous studies have addressed the pathogenicity of influenza viruses, influenza pathogenesis remains incompletely understood. Here we generate influenza viruses expressing fluoresce...
Influenza A/H3 and B viruses co-circulated in the 2004 2005 epidemic season in Japan, and we confirmed a case of co-infection by both viruses. The two influenza viruses were isolated from a single patient by the plaque purification technique, and co-infection was confirmed. The patient was a 4-year-old girl whose throat swab specimens were positive for both influenza A and B viruses by a quick ...
Recently, three novel avian-origin swine influenza viruses (SIVs) were first isolated from pigs in Guangdong Province, southern China, yet little is known about the seroprevalence of avian influenza viruses among pigs in southern China. Here, we report for the first time the seroprevalence of avian H3, H4, and H6 influenza viruses in swine populations and the lack of seroepidemiological evidenc...
To study influenza viruses in pigs in Sri Lanka, we examined samples from pigs at slaughterhouses. Influenza (H3N2) and A(H1N1)pdm09 viruses were prevalent during 2004-2005 and 2009-2012, respectively. Genetic and epidemiologic analyses of human and swine influenza viruses indicated 2 events of A(H1N1)pdm09 virus spillover from humans to pigs.
Avian influenza is caused by influenza viruses such as the influenza A virus. In 1997 in Hong Kong, the avian influenza viruses were found to cross the species barrier to infect human beings and cause respiratory illness and death. H5N1 viruses later reemerged in Asia with human cases of infection, of which more than 50% were fatal. We proposed to genetically engineer naturally occurring bacter...
Between September 2011 and January 2012, influenza activity was reported in Africa, the Americas, Asia, Europe and Oceania. Influenza A(H1N1)pdm09 viruses circulated at very low levels in general with the exception of some countries in Asia and the Americas. Influenza A(H3N2) viruses were predominant in Europe, many countries in the Americas and northern Africa and some countries in Asia. Influ...
Arbidol is superior over remantadine as regards a wide antiviral spectrum, shows a pronounced chemotherapeutical effect against influenza A/B viruses in a cell culture and on an experimental influenzal pneumonia, induced by A/B viruses. Remantadine is efficient only against influenza A virus, but it is inefficient against influenza B virus. In addition, in the experiment, the resistivity of inf...
Influenza illness is caused by influenza A and influenza B strains. Although influenza A viruses are perceived to carry greater risk because they account for the majority of influenza cases in most seasons and have been responsible for influenza pandemics, influenza B viruses also impose a substantial public health burden, particularly among children and at-risk subjects. Furthermore, since the...
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