Avian influenza virus, TEM C016 / 5841
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Avian influenza virus, TEM C016 / 5841
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 July 2013 no human to human transmission has been recorded. Magnification: x82, 000 when printed at 10 centimetres wide
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Media ID 9206885
© CENTRE FOR INFECTIONS/PUBLIC HEALTH ENGLAND/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) surrounded by a nucleocapsid and a lipid envelope. Within the envelope are two types of protein spikes known as haemagglutinin (H) and neuraminidase (N), which play a crucial role in determining the strain of the virus. While wild birds serve as natural hosts for this virus, it has been observed that infected domestic chickens do not exhibit any symptoms. This poses an alarming risk for human transmission, especially for individuals who come into contact with these seemingly healthy chickens. Unfortunately, nearly one-third of human infections have proven to be fatal. As of July 2013, no instances of human-to-human transmission have been recorded. However, scientists continue to study this highly virulent pathogen to better understand its behavior and potential threats to public health. With a magnification level of x82,000 when printed at 10 centimeters wide, this colored TEM image provides valuable insights into the structure and characteristics of the Avian influenza virus. It serves as a reminder that vigilance and research are essential in combating emerging infectious diseases like bird flu in our ever-evolving world.
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