Avian influenza virus, TEM C016 / 2353
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Avian influenza virus, TEM C016 / 2353
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
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9202259
© 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. Coloured using transmission electron microscopy (TEM), this image provides a detailed look at the structure of the virus. First detected in China in March 2013, this particular strain has proven to be highly pathogenic and dangerous to humans. The Avian influenza virus is composed of ribonucleic acid (RNA) surrounded by a nucleocapsid and a lipid envelope. Within the envelope, two types of protein spikes called haemagglutinin (H) and neuraminidase (N) can be found, which determine the specific strain of the virus. Interestingly, infected domestic chickens do not display any symptoms, making it easier for them to spread the virus to humans who come into contact with them. Unfortunately, nearly one-third of human infections caused by this avian flu strain have resulted in fatalities. As of May 2013 when this photo was taken, there had been no recorded instances of human-to-human transmission. The natural hosts for this virus are wild birds; however, its ability to infect humans poses significant health risks. This image serves as a reminder of both the beauty and complexity that exists within microscopic pathogens like avian influenza viruses. It also highlights our ongoing battle against infectious diseases in the 21st century and underscores why continued research into prevention and treatment is crucial for global health security.
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