Produced by the National Institute of Allergy and Infectious Diseases (NIAID), under a magnification of 25,000X, this digitally-colorized scanning electron microscopic (SEM) image depicts numerous filamentous Ebola virus particles (blue) budding from a chronically-infected VERO E6 cell (yellow-green).
Ebola is one of numerous Viral Hemorrhagic Fevers. It is a severe, often fatal disease in humans and nonhuman primates (such as monkeys, gorillas, and chimpanzees).
Ebola is caused by infection with a virus of the family Filoviridae, genus Ebolavirus. When infection occurs, symptoms usually begin abruptly. The first Ebolavirus species was discovered in 1976 in what is now the Democratic Republic of the Congo near the Ebola River. Since then, outbreaks have appeared sporadically. See the Flickr link for additional SEM NIAID Ebola virus imagery.
Placoid scales aka dermal denticles are found in cartilaginous fishes such as sharks, rays, and chimaeras.
They are also structurally homologous with vertebrate teeth (“denticle” translates to “small tooth”), having a central pulp cavity supplied with blood vessels, surrounded by a conical layer of dentine, all of which sits on top of a rectangular basal plate that rests on the dermis.
The shape of denticles is specific to individual species and cannot grow in size, but rather more scales are added as the fish increases in size.
SEM image of Banded Wobbegong Shark (Orectolobus ornatus), Brier Shark (Deania calcea), Tiger Shark (Galeocerdo cuvier) and Gummy Shark (Mustelus antarctius) denticles.