Transcript Bacterium and virus images

BACTERIUM AND VIRUS IMAGES
Norovirus
Colour-enhanced electron micrograph of norovirus, known as the ‘winter vomiting bug’.
The virus particles are 27–38 nanometres in diameter.
Credit: David Gregory & Debbie Marshall/Wellcome Images
Measles in a brain cell
Colour-enhanced transmission electron micrograph of a brain-cell nucleus being overrun with replicating measles virus.
Encephalitis (brain inflammation) occurs in 1 in 1,000 cases of measles.
Credit: Mike Kayser/Wellcome Images
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Helicobacter bacteria
Scanning electron micrograph of a colony of Helicobacter, the bacterium that causes most stomach ulcers.
Credit: David Gregory & Debbie Marshall/Wellcome Images.
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HIV particles budding from a lymphocyte
Human immunodeficiency virus (HIV) virions (blue) budding from the surface of a T cell (a type of lymphocyte).
The viruses replicate inside the cell, with the different components gathering at the cell membrane to be assembled into new virus particles.
Credit: R Dourmashkin/Wellcome Images
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Influenza virus infecting cells
Influenza viruses (blue) attaching to the cells of the upper respiratory tract. Viruses floating in the air are breathed in and bind to the
hair-like microvilli and cilia on the surface of the cells that line the trachea. They then enter the cells and start to proliferate, eventually causing the cells to die.
Credit: R Dourmashkin/Wellcome Images
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MRSA
Clusters of methicillin-resistant Staphylococcus aureus (MRSA) bacteria.
Credit: Annie Cavanagh/Wellcome Images
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HPV in cervical epithelium
A lesion in human cervical epithelium infected with human papilloma virus (HPV16). Early viral proteins (green) bind to
and reorganise the keratin filaments (red) towards the edge of the cell. Cell nuclei are stained blue.
Credit: MRC NIMR/Wellcome Images
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H1N1 virus
A model of the H1N1 virus, which causes ‘swine flu’. The name H1N1 refers to the types of haemagglutinin and neuraminidase proteins
on the surface of the virus. There are roughly ten times as many haemagglutinin proteins (red) as neuraminidase (yellow). In the centre is the single-stranded viral RNA (purple).
Credit: Anna Tanczos/Wellcome Images
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Ebola virus structure
Illustration of the structure of a single Ebola virus particle. The Ebola virus belongs to the Filoviridae family of viruses and causes Ebola virus disease (also known as Ebola haemorrhagic fever) in humans.
A. Viral protein VP40; B. Viral protein VP24; C. Nucleoprotein, encapsulating viral RNA; D. Minor nucleoprotein VP30, E. Surface glycoprotein
Credit: Pete Jeffs/Wellcome Images
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