نتایج جستجو برای: influenza virus
تعداد نتایج: 431493 فیلتر نتایج به سال:
Introduction: Epidemics and deaths caused by influenza viruses are an important concern worldwide. The use of neuraminidase inhibitors such as oseltamivir is an effective and valuable way to treat the diseases caused by these viruses. However, the mutation in several parts of the gene leads to the emergence of drug-resistant strains, and an ever-increasing rise in drug-resistant strains is a gl...
Background and Objective: Adamantanes, amantadine, and rimantadine have been used for many years for prevention and treatment of influenza virus A infections. These drugs are influenza virus M2 protein inhibitors and some amino acids substitutions in transmembrane portion of this protein cause resistance to them. This study was done for survey of adamantane resistance related nucleotide sequenc...
background and aims: influenza virus is a major pathogen involved in respiratory illnesses during winter seasons. a variety of diagnostic methods have been developed to identify influenza viruses in clinical specimen. methods: nasal and pharyngeal samples taken from patients were inoculated into madin-darby canine kidney (mock) cells and embryonated chicken eggs (eces). the culture media was as...
equine influenza is an acute, infectious and highly contagious respiratory disease with worldwide distribution and high morbidity and low mortality. the disease caused by h7n7 and h3n8 subtypes of genus (type) a of influenza virus. the most significant clinical signs of this disease are fever, coughing and nasal discharge. in this study, the presence of antibody against two subtypes of equine i...
Introduction: The emergence and spread of the pandemic H1N1 influenza virus in 2009 indicates a limitation in the strategy to control the infection, despite a long-established vaccination programme and approved antivirals. Production the proper vaccine against influenza is difficult due to the genetic recombination of virus in the event of pandemic and co-circulation of drug-resistance variants...
High morbidity and mortality of influenza virus infection makes it an important disease world-wide. Mouse is a very well-studied animal model for this disease with similar manifestation to human disease. It would be desirable to induce mucosal as well as circulating immune responses to obtain protection from infection and to decrease the spread of the virus. Cell mediated immunity (proliferativ...
background influenza type a (h1n1) causes an epidemic disease, resulting in thousands of deaths throughout the world. objectives our aim was comparing the efficacy of two different methods in isolating the influenza (h1n1) virus including cell culture and real-time pcr in tabriz and suburbs. patients and methods of throat swab samples, 220 were collected in viral transport medium (vtm) from pat...
background and aims: influenza (flu) is a respiratory infection in mammals and birds. it is caused by an rna virus in the family orthomyxoviridae. the virus is divided into three main types. influenza virus type a is found in a wide variety of bird and mammal species and can undergo major shifts in immunological properties. hemagglutinin (ha) is an important influenza virus surface antigen that...
to construct a semen bank, the collection of donated semen has to be done and an important concern is the safety of collected semen. the contamination is a big problem. basically, the infectious pathogens can exist within donated semen, hence, a good donor screening is very important. although viruses have an indirect role in sperm quality, but the evidence in banked semen is presently lack. th...
background: influenza a viruses bearing all known ha and na subtypes have been isolated from avian hosts: but only the a/h1n1,a/h2n2 and a/h3n2 influenza subtypes have been associated with widespread epidemics in humans until now .while influenza b detected only in humans. subtype h5 infection in humans occurred for the first time during 1997-1998 in hong kong, then china in 2003, vietnam and...
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