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Neisseria gonorrhoeae diplococci

Type IV pilus filaments on Gram-negative bacterial pathogens control movement, attachment, immune escape, and natural transformation. Pili are attractive targets for vaccines and therapeutics because of the key role they play in bacterial virulence as well as their prominent cell surface exposur... Read More

Neisseria gonorrhoeae

This photomicrograph is showing Neisseria gonorrhoeae in a cervical smear using the Gram-stain technique. Thanks to the CDC's PHIL for the image. Read More

Leptospira sp.

This scanning electron micrograph (SEM) depicts a number of Leptospira sp. bacteria atop a 0.1. µm polycarbonate filter.

Leptospira interrogans causes leptospirosis, a usually mild febrile illness that may result in liver or kidney failure. Leptospira is a flexible, spiral-shaped, Gram-negati... Read More

Euglena species

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

tetanus in a mouse showing body curvature (opisthotonos)

tetanus in a mouse showing body curvature (opisthotonos) Read More

Why we should wash our hands regularly #1

Pseudomonas aeruginosa is a common bacterium which can cause disease in animals and humans.
An equal opportunity offender, it uses a wide range of organic material for food; in animals, this versatility enables 'ol Pseudomon here to infect damaged tissues or people with reduced immunity.
The... Read More

Why we should wash our hands regularly #3

When I first saw this photomicrograph of Haemophilus influenzae via immunofluorescence, I thought of the opening days of the first Gulf War, when CNN showed wall to wall images of the bombing of Baghdad. The crude nightvision technologies available at the time rendered everything in that green/... Read More

Hepatitis virions, of an unknown strain of the organism

: 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

Cryptococcus neoformans

Cryptococcus neoformans in solitary nodule (400X) Read More

Examining Virus Bacterium Associations




Virus-bacterium associations were examined in the natural environment of a termite's hindgut. Three general scenarios were seen. In the first (1) there was a one-to-one association: one type of virus matched one type of bacterium host. In the second (2) the host bacterium was associated wi... Read More

Gram-positive cocci

Gram-positive cocci showing various morphological arrangements including diplococcus and tetrads. (approx. X970). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Corynebacterium diphtheria

Corynebacterium diphtheriae. Elek plates showing lines of identity. Paper strip is saturated with antitoxin organisms (black growth) producing toxin Read More

Atomic Force Microscope Image-E. Coli

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

Slime mold Arcyria denudata

Arcyria called Cotton Candy Slime. A Myxomycetes 1 mm tall. Read More

gram stain from blood agar smear

slide of a gram stain from blood agar smear Read More

Drawing of broken red blood cells, as seen in the blood of people with hemolytic uremic syndrome.

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.
Read More

Baby Seal near McMurdo Station in Antarctica

This baby seal was found on the sea ice near McMurdo Station during one of many excursions to collect soil samples for microbiological analysis. During November and December, there are many baby seals in the area. Photo taken by Hubert Staudigel from the Scripps Institution of Oceanography and... Read More

Micrasterias denticulata

Micrasterias is a Desmid - a group of green algae mostly found in neutral to acidic fresh waters and sphagnum bogs. Most are unicellular, though a few form chain-like colonies. Each cell is constructed of 2 semicells which are mirror images of each other. In Micrasterias the cells are flattened ... Read More

Dermacentor sp. tick

Under a low magnification of 23X, this scanning electron micrograph (SEM) depicted a dorsal view of an unidentified male Dermacentor sp. tick found upon a cat in the suburbs of Decatur, Georgia, which measured approximately 3.5mm from its gnathosoma (i.e., capitulum), which is where its mouthpa... Read More

Plasmodium falciparum

Plasmodium falciparum male and female gametocyte (1000X) Read More

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