Avian influenza virus, TEM C015 / 8799
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Avian influenza virus, TEM C015 / 8799
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 (yellow). 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
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9238507
© 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, specifically the type A strain H7N9. The image, captured using a transmission electron microscope (TEM), reveals the intricate details of this pathogenic virus that first emerged in China in March 2013. The Avian influenza virus is composed of ribonucleic acid (RNA) enclosed within a nucleocapsid and a lipid envelope, depicted here in striking yellow. Within the envelope are two distinct protein spikes known as haemagglutinin (H) and neuraminidase (N), which play a crucial role in determining the strain of the virus. Interestingly, while wild birds serve as natural hosts for this virus, infected domestic chickens do not display any symptoms. This poses an alarming risk for human transmission since individuals who come into contact with these seemingly healthy chickens may unknowingly contract and spread the disease. Alarmingly, nearly one-third of human infections caused by this avian flu strain have proven to be fatal. As of May 2013 when this photo was taken, no instances of human-to-human transmission had been recorded. However, ongoing research continues to shed light on this highly infectious and potentially deadly virus. This visually stunning image serves as a reminder of the microscopic world that exists around us and highlights both the beauty and danger present within nature's delicate balance.
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