Avian influenza virus, TEM C015 / 8800
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Avian influenza virus, TEM C015 / 8800
Avian influenza virus, type A strain H7N9, coloured transmission electron micrograph (TEM). This virus first emerged in the human population in China, in March 2013. The virus consists of ribonucleic acid (RNA), surrounded by a nucleocapsid and a lipid envelope (red). In the envelope are two types of protein spike, haemagglutinin (H) and neuraminidase (N), which determine the strain of virus. The natural hosts of this virus are wild birds. Unusually, infected domestic chickens do not show symptoms, which increases the potential for spread to humans that have contact with chickens. Nearly a third of human infections are proving to be fatal. As of May 2013 no human to human transmission has been recorded
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Media ID 9238751
© CDC/SCIENCE PHOTO LIBRARY
2013 Antigen Avian Bird Bird Flu Capsid China Envelope Enveloped Haemagglutinin Hemagglutinin Influenza A H7n9 Lipid Microbiology Microscope Negatively Stained Neuraminidase Nucleocapsid Orthomyxoviridae Orthomyxovirus Particle Pathogenic Pathological Pathology Polymorphic Ribonucleic Acid Rna Virus Segmented Genome Serotype Strain Transmission Electron Transmission Electron Micrograph Type A Viral Virion Virological Virology Microbiological Pathogen Protein Virus
EDITORS COMMENTS
This print showcases the Avian influenza virus, type A strain H7N9, captured through a coloured transmission electron micrograph (TEM). Originating in China in March 2013, this virus is composed of ribonucleic acid (RNA) surrounded by a nucleocapsid and a striking red lipid envelope. Within the envelope reside two distinct protein spikes known as haemagglutinin (H) and neuraminidase (N), which determine the specific strain of the virus. Wild birds serve as natural hosts for this avian influenza virus; however, it has been observed that infected domestic chickens do not display any symptoms. This unique characteristic increases the potential for human transmission when individuals come into contact with these seemingly healthy poultry. Alarmingly, nearly one-third of human infections have proven to be fatal since its emergence. As of May 2013, no instances of human-to-human transmission have been recorded. Nevertheless, scientists continue to study this pathogenic agent closely due to its devastating impact on public health. The photograph provides valuable insights into the intricate structure and composition of this viral particle while highlighting key features such as its enveloped nature and antigenic proteins. Taken by CDC/SCIENCE PHOTO LIBRARY from Science Photo Library, this image serves as an invaluable resource for researchers in virology and microbiology fields alike. Its detailed depiction sheds light on various aspects including morphology, pathology, serotype determination through H and N proteins analysis - all contributing towards our understanding of this significant biological threat in the 21st century.
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