Avian influenza virus, TEM C016 / 2354
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Avian influenza virus, TEM C016 / 2354
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. 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 9202261
© 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 back in March 2013, this particular virus is composed of ribonucleic acid (RNA) enveloped by a nucleocapsid and lipid envelope. Within the envelope are two distinct protein spikes known as haemagglutinin (H) and neuraminidase (N), which play a crucial role in determining the specific strain of the virus. Wild birds serve as natural hosts for this avian influenza virus; however, what makes it particularly concerning is that infected domestic chickens do not display any symptoms. This lack of visible signs increases the risk of transmission to humans who come into contact with these seemingly healthy poultry. Alarmingly, nearly one-third of human infections have proven to be fatal thus far. It's important to note that as of May 2013, there have been no recorded instances of human-to-human transmission. Nevertheless, researchers continue their diligent efforts to understand and combat this pathogenic threat. The intricate details captured within this image highlight various aspects such as the enveloped structure, protein spikes on its surface, and segmented genome characteristic of orthomyxoviruses like Influenza A H7N9. With its vibrant colours contrasting against a dark background, this photograph serves as both an artistic representation and scientific tool for studying and understanding this significant viral pathogen.
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