Under a low magnification of 5X, this photograph depicted a number of Legionella pneumophila colonies that had been cultivated on Feeley-Gorman (FG) agar. Note the “cut-glass” appearance displayed by the round, off-white colored colonies. FG agar is used particularly in the cultivation of Legion... Read More
Several paramecia showing internal structures. From the Wistreich Collection. Read More
Swarm of paramecia surrounding an unidentified protozoan. From the Wistreich Collection. Read More
This digitally-colorized scanning electron micrograph (SEM) depicted large numbers of Gram-positive Enterococcus faecalis sp. bacteria.
“Enterococci, leading causes of nosocomial bacteremia, surgical wound infection, and urinary tract infection, are becoming resistant to many and sometimes al... Read More
This digitally-colorized transmission electron micrograph (TEM) revealed the presence of hepatitis B virions. The large round virions are known as Dane particles.
Hepatitis means inflammation of the liver. Toxins, certain drugs, some diseases, heavy alcohol use, and bacterial and viral infec... Read More
Click source to view photos of the development of a smallpox immunization lesion on a listener of This Week in Virology's arm. Read More
A multitalented scientist and inventor, John William Draper worked as a chemistry professor at the University of New York, where he conducted research in numerous fields, ranging from medicine and philosophy to spectrum analysis and photography. This photograph displaying the physiological chara... Read More
At her microscope, this historic image of bacteriologist Dr. Ida A. Bengston (1881-1952), was taken from the U.S. Public Health Service records.
This photo is symbolic of the importance of laboratory equipment to the CDC’s progress in the improvement of world wide public health standards. Dr. B... Read More
Escherichia coli use long, whip-like structures called flagella to propel themselves. Motors in the cell's wall spin the flagella into bundles that rotate counter-clockwise, creating a twist that causes the bacterium to rotate clockwise, or towards the right when viewed from above.
Insight in... Read More
Photograph of a poster issued by the Chinese government in the late 1970s depicting the spread of schistosomes to humans from snails as a consequence of agricultural practices. These posters have been in the office of Dickson Despommier since the 1970s. Read More
Photograph of a poster issued by the Chinese government in the late 1970s depicting the spread of hookworm to humans by the use of human feces as fertilizer. A prevention method is also illustrated - wearing shoes. These posters have been in the office of Dickson Despommier since the 1970s. Read More
A computer model shows side and top views of two different proteins produced by anthrax bacteria. The green molecule is "protective antigen" (PA), which spontaneously forms pores that penetrate organic membranes such as cell walls. The yellow molecule is "lethal factor (LF)." When a voltage is a... Read More
On a lavender background, this illustration provides a 3D graphical representation of a generic influenza virion’s ultrastructure, and is not specific to a seasonal, avian or 2009 H1N1 virus.
There are three types of influenza viruses: A, B and C. Human influenza A and B viruses cause season... Read More
This image of the common Eschericia coli--or E. coli--was taken using a special microscope called an Atomic Force Microscope (AFM). The AFM image was produced by tracking across the top of the bacteria with a very sharp tip. The tip is as sharp as a few atoms. The very small change in height (am... Read More
In hemolytic uremic syndrome, toxins destroy red blood cells. These misshapen cells may clog the tiny blood vessels in the kidneys.
Credit: National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health.
Click source to view some great images of crops being destroyed as the result of E. coli prevention steps in Europe. Read More
: This transmission electron micrograph (TEM) revealed numerous hepatitis virions, of an unknown strain of the organism. In the United States, viral hepatitis is an important public health problem because it causes serious illness, it affects millions, and it has a close connection with HIV. The... Read More
Young sibling polyps of staghorn coral (Acropora millepora) three days after settlement. In a National Science Foundation-supported study, researchers found that the ability to fluoresce may influence whether or not the coral settle on the reef of their origin or disperse, and go elsewhere.
M... Read More
Click source to view images of workers throwing away cucumbers to be destroyed at an agriculture facility near Bucharest on Monday, June 6, as sales collapsed in Romania's markets due to the fear of E. coli contamination. Read More
Color-enhanced scanning electron micrograph showing Salmonella typhimurium (red) invading cultured human cells.
Salmonella is actually a group of bacteria that can cause diarrheal illness in humans. They are microscopic living creatures that pass from the feces of people or animals to other p... Read More