The appearance of an algal bloom in Griffith Park, Los Angeles. From the Wistreich Collection Read More
The presence of green algae colonizing the air space. From the Wistreich Collection. Read More
Euglena species in Euglena broth media. From the Wistreich Collection Read More
Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections are caused primarily by a single strain—USA300—of an evolving bacterium that has spread with “extraordinary transmissibility” throughout the United States during the past five years, according to a new study le... Read More
This image depicts a number of what were “suspected” smallpox scab fragments, from the archives of the Virginia Historical Society (VHS).
These fragments came to light when the Museum was in the process of putting together an exhibit entitled, “Bizarre Bits”, chronicling its collection dating... Read More
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