Avian influenza virus, TEM C015 / 8797
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Avian influenza virus, TEM C015 / 8797
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 (pink). 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 9238455
© 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 transmission electron microscope (TEM). The image reveals the intricate structure of this pathogenic virus that first emerged in China's human population in March 2013. Composed of ribonucleic acid (RNA), encased within a nucleocapsid and a lipid envelope colored pink, the virus exhibits two distinct protein spikes known as haemagglutinin (H) and neuraminidase (N). These spikes play a crucial role in determining the strain of the virus. Interestingly, wild birds serve as natural hosts for this avian flu virus. However, infected domestic chickens do not display any symptoms, which poses an increased risk for transmission to humans who come into contact with these birds. Alarmingly, nearly one-third of human infections caused by this strain prove to be fatal. As of May 2013, no instances of human-to-human transmission have been recorded. Nevertheless, scientists continue to study this highly virulent pathogen closely. This photograph offers us a glimpse into its microscopic world and serves as a reminder of the ongoing battle against infectious diseases in our modern era.
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