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- Electron micrograph of Toxoplasm gondii
- Toxoplasm gondii is a common protozoan parasite that causes a disease called toxoplasmosis. Although not normally harmful to humans, in immunocompromised hosts and in newborn babies toxoplasmosis is harmful. Colour was added to this micrograph using Adobe Photoshop.
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- Electron micrograph of human granulocytic erhlichiosis (HGE)
- The causative agent for HGE, colorized in red, is transmitted by deer ticks. Unlike Lyme disease, which is also transmitted by these ticks, little is know about it. This picture shows the organism inside a human cultured cell line. It was colorized with Adobe Photoshop.
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- Electron micrograph of Adenovirus
- Adenoviruses are a group of DNA-containing viruses that cause conjunctivitis and upper respiratory tract infections in humans. The micrograph was colorized with NIH Image.
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- Electron micrograph of macrophage containing engulfed bacteria
- Macrophages are a major defence mechanism against infection. With an ability to detect and engulf foreign macromolecules within the body they play an important role in combating infection.
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- Cryosection through a Listeria monocytogenes infected cell
- Listeria monocytogenes infects cells through the phagocytic pathway. This micrograph shows a cryosection through a listeria-containing phagosome. The bacterium is shown in green. The section has been immuno-labeled with antibodies which recognise a compound that accumulates in regions of the cell with acidic contents. The antibodies have been visualized with colloidal gold particles, shown in red. Clearly, during the early stages of infection, organelles with acidic contents fuse with the phagosome.
Colorized with Adobe Photoshop.
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- Pancreas after freeze substitution
- Immunolabeled section of pancreas. It was prepared by fixation in buffered 4% formaldehyde, cryoprotected in sucrose, frozen by immersion in liquid nitrogen and freeze substituted in methanol containing 1% osmium tetroxide. The freeze substitution was carried out using a simple method.
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