virus (antigenic shift), effectively becoming a new subtype. Viral evolution isfacilitatedby animals such as pigs and birds, which serve as reservoirs of influenza viruses. When apigis simultaneously infected with different influenza A viruses, such as human, swine, and avian strains,genetic ...
In humans, the symptoms it causes are anacute respiratory tract infectionwith fever and sore throat,coughand malaise. If the virus becomes systemic there may also be vomiting and abdominal pain. H5N1 viruses are highly pathogenic and there is a high casemortality ratewith these infections (Wright...
Influenza A virus subtype H5N1, also known as "bird flu", A(H5N1) or simply H5N1, is a subtype of the influenza A virus which can cause illness in humans and many other animal species. A bird-adapted strain of H5N1, called HPAI A(H5N1) for "highly pathogenic avian influenza virus ...
Influenza A Virus Influenza A virusis a global common exposure with seasonal variation. Influenza A viruses infect and replicate in cells in the respiratory epithelium. In addition to sickness symptoms, includinghypersomniaduring acute infection, cases withneurological complicationsare often reporte...
INFLUENZA A virus, H5N1 subtypeINFLUENZA virusesDISEASE risk factorsPOLYMERASE chain reactionDIAGNOSISANTIVIRAL agentsBackground: The National Avian Influenza Surveillance (NAIS) system detected human H5N1 cases in Thailand from 2004- 2006. Using NAIS data, we identified risk facto...
Acquisition of Human-Type Receptor Binding Specificity by New H5N1 Influenza Virus Sublineages during Their Emergence in Birds in Egypt Highly pathogenic avian influenza A virus subtype H5N1 is currently widespread in Asia, Europe, and Africa, with 60% mortality in humans. In particular, si... Y...
Tissue tropism and pathogenesis of influenza A virus subtype H5N1 disease in humans is not well defined. In mammalian experimental models, H5N1 influenza i... MUE Al - 《Emerging Infectious Diseases》 被引量: 523发表: 2005年 AVIAN INFLUENZA A/H5N1 The World Health Organization (WHO) regards av...
Minor changes in antigenic structure (hemagglutinin and/or neuraminidase) via random point mutation Does not alter the subtype (e.g., H5N1 or “avian flu”). Causes epidemics (limited to a specific population or region)Small shifts in a panda's habitat can cause epic dread: Shifts can caus...
H7N2, H7N3, and H10N7 human infections have been reported. Influenza B virus is almost exclusively a human pathogen, and is less common than influenza A. It mutates less rapidly than influenza A, and there is only one influenza B subtype. In humans, common symptoms of influenza infection...
The CDC still considers the risk of getting H5N1 very low for humans. All of the cases have been from direct contact with poultry or cows that had the virus. There has been no person-to-person spread of the virus. Bird Flu Symptoms ...