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Orange pigmented crustose lichens

Orange pigmented crustose lichens. From the Wistreich Collection. Read More

Egg of Hymenolepis diminuta

Eggs of Hymenolepis diminuta. These eggs are round or slightly oval, size 70 - 85 µm X 60 - 80 µm, with a striated outer membrane and a thin inner membrane. The space between the membranes is smooth or faintly granular. The oncosphere has six hooks. There are no polar filaments extending into... Read More

An algal bloom in a stream bordering land plants

An algal bloom in a stream bordering land plants. From the Wistreich Collection Read More

Algal Bloom

The appearance of an algal bloom in Griffith Park, Los Angeles. From the Wistreich Collection Read More

Green Algae

The presence of green algae colonizing the air space. From the Wistreich Collection. Read More

Euglena species in Euglena broth media

Euglena species in Euglena broth media. From the Wistreich Collection Read More

S. aureus bacteria escaping destruction by human white blood cells.

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

Euglena species

Microscopic view of Euglena species (approx X 100) Read More

“Suspected” smallpox scab fragments, from the archives of the Virginia Historical Society

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

A single Vorticella species.

A single Vorticella species. From the Wistreich collection. Read More

Legionella pneumophila colonies

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

Several paramecia showing internal structures. From the Wistreich Collection. Read More

Swarm of paramecia surrounding an unidentified protozoan

Swarm of paramecia surrounding an unidentified protozoan. From the Wistreich Collection. Read More

Gram-positive Enterococcus faecalis sp. bacteria

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

Hepatitis B virions with Dane particles

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

Smallpox vaccine - photos of immunization site

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

Photomicrograph of Algae - 1856 by John William Draper

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

Bacteriologist Dr. Ida A. Bengston (1881-1952)

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

How Escherichia coli Move

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

Schistosomiasis poster

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

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