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Influenza A (H1N1) aka Swine Flu Virus

Under a plate magnification of 37,800X, this colorized transmission electron micrograph (TEM) depicted the A/New Jersey/76 (Hsw1N1) virus, while in the virus’ first developmental passage through a chicken egg. Read More

Algae and Diatoms

This image by Dr. Arlene Wechezak, Anacortes, Washington, United States, won 10th place in Nikon's 2009 Small World microscopy competition. Nikon's Small World Twitter feed (@NikonSmallWorld) is currently showcasing algae and larvae that are in danger in the Gulf oil spill. Read More

Bacillus anthracis bacteria

This photomicrograph depicted a number of Gram-positive, endospore-forming Bacillus anthracis bacteria. B. anthracis is the pathologic microorganism responsible for the disease “anthrax”, an acute infectious disease, which most commonly occurs in wild and domestic vertebrates (cattle, sheep, goa... Read More

Physarum polycephalum Different view

Physarum polycephalum, slime mold, grown in a large perti plate on moist paper towels using oatmeal as the food source. Culture was grown in the dark at room temperature. The paper towel was moistened every day with tap water. After 3 week’s the culture formed sporangia (fruiting bodies). Image ... Read More

Bacteroides fragilis

Bacteroides fragilis in a roll tube culture Read More

Taenia spp. scolex

Taenia spp. scolex 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

Parasite Nippostrongylus brasiliensis

Nikon Small World Image of Distinction 2011 photomicrography competition, Sinclair Stammers, Science Photo Library, UK

Nippostrongylus brasiliensis (rat nematode parasite) (560x)
Technique: Differential Interference Contrast Read More

Blastomyces dermatitidis

Blastomyces dermatitidis. Yeast from tissue smear. Gomori methenamine silver nitrate stain. (400x) 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

Absidia corymbifera

Absidia corymbifera in a transplantable 'tumor' of the mouse Read More

Blastomyces dermatitidis

Blastomyces dermatitidis on BHI agar. Yeast phase colonies Read More

The results of a pour plate using Serratia marcescens as the inoculum

The results of a pour plate using Serratia marcescens as the inoculum. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Plasmodium yoelii nigeriensis

Colorized scanning electron micrograph of malaria (Plasmodium yoelii nigeriensis) oocysts ( thick-walled structure in which sporozoan zygotes develop) developing on the midgut wall of the mosquito Anopheles.

Credit: Hilary Hurd, Wellcome Images Read More

Algal Bloom

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

Negative stain smallpox virus

Magnification 65,000X.

Smallpox is a serious, highly contagious, and sometimes fatal infectious viral disease. There is no specific treatment for smallpox disease, and the only prevention is a smallpox vaccination. Read More

Plasmodium gallinaceum

This is a scanning electron micrograph of Plasmodium gallinaceum, which causes malaria in poultry, invading the midgut of the Aedes aegypti mosquito.
Credit: NIAID

"Fighting Drug-Resistant Malaria"
Rick Fairhurst and Others at NIAID Go Global
By Kristofor Langlais, NICHD, for the NIH Catal... Read More

Influenza viron

On a dark-blue 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. A portion of the virion’s outer protein coat has been cut away, which reveals the virus’ contents, and ... Read More

Gram-negative rods

Gram-negative rods, possibly E. coli. (approx. 1000 X). Taken from the Wistreich Collection. Read More

Toxoplasma gondii oocysts from cat feces

Toxoplasma gondii oocysts from cat feces. Taken from the Wistrich Collection. Read More

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