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Little brown bat: White-nose fungus

Little brown bat; close-up of nose with fungus, New York, Oct. 2008.
Credit: Photo courtesy Ryan von Linden/New York Department of Environmental Conservation

What is white-nose syndrome?
In February 2006 some 40 miles west of Albany, N.Y., a caver photographed hibernating bats with an unusu... Read More

Colorful cells

Actin (purple), microtubules (yellow), and nuclei (green) are labeled in these cells by immunofluorescence. This image won first place in the Nikon 2003 Small World photo competition.

Torsten Wittmann, Scripps Research Institute Read More

Fruticose lichen

A fruticose (leaflike) lichen. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Corona - but not the kind a good guest brings to your summer picnic

Remember SARS? Or the last time you had a nasty cold? Lay your troubles at this bad-boy's door.
In fact, SARS-CoV - the Corona variant that causes SARS - has the rather unique quality of causing both upper & lower respiratory infections, and gastroenteritis.
Note as well that the Coronavi... Read More

An ounce of prevention . . .

As the old saying goes, can beat a pound of the Shigella bacteria, seen here penetrating the intestinal mucosa of some poor soul.
Killing approx. 1 million people annually - most of them children, Shigella is best prevented by two simple strategies: washing hands before handling food & thorou... Read More

Haematococcus, Euplotes, and Cyclidium

Haematococcus (algae), Euplotes (protozoa), and Cyclidium (ciliate) (400x)

2012 Nikon Small World Photomicrography Competition, Charles Krebs, Issaquah, Washington, USA Read More

Blastomyces dermatitidis

Blastomyces dermatitidis in pus from a dressing. Two characteristic budding cells are present. Note broad base building Read More

Escheria coli in spinal fluid - gram stain

Escheria coli in spinal fluid - gram stain Read More

Influenza Virions (1973)

This colorized negative-stained transmission electron micrograph (TEM) depicts the ultrastructural details of a number of influenza virus particles, or “virions”. A member of the taxonomic family Orthomyxoviridae, the influenza virus is a single-stranded RNA organism

The flu is a contagious r... Read More

Mycobacterium tuberculosis. Young colony on brain heart infusion. A virulent strain

Mycobacterium tuberculosis. Young colony on brain heart infusion. A virulent strain Read More

Virions of a hantavirus known as the Sin Nombre virus (SNV).

This transmission electron micrograph (TEM) revealed the ultrastructural appearance of a number of virus particles, or “virions”, of a hantavirus known as the Sin Nombre virus (SNV).

In November 1993, the specific hantavirus that caused the Four Corners outbreak was isolated. Using tissue fro... Read More

Corynebacterium - Tissue section

Corynebacterium - Tissue section. H & E stain. Diphtheritic tonsillitis Read More

Bacillus species

Simple stained preparation of Bacillus species showing chains of rods and spores. (approx. X 970). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

1918 influenza virions

This negative stained transmission electron micrograph (TEM) shows recreated 1918 influenza virions that were collected from supernatants of 1918-infected Madin-Darby Canine Kidney (MDCK) cells cultures 18 hours after infection.

To separate these virions, the MDCK cells are spun down (centrif... Read More

When Germ Relationships Go Bad

Cartoon of a couple of bacteria having marital problems. Via Wikipedia Commons. Illustration by Gaspirtz. Read More

Listeria monocytogenes against brain macrophages.

Listeria monocytogenes has a particular tropism for the central nervous system. To gain knowledge about the immune response elicited by L. monocytogenes in the brain, we used a rat ex-vivo organotypic nervous system culture as a model for Listeria infection. Brain sections were maintained severa... Read More

Cladosporium carrioni

Cladosporium carrioni in chromomycosis. Brown Sclerotic cells. H & E stain Read More

Acid fast colony (triple stain) in blood culture of a patient with untreated pulminary tuberculosis

Acid fast colony (triple stain) in blood culture of a patient with untreated pulminary tuberculosis Read More

Pseudomonas fluorescens

Pseudomonas fluorescens under Woods lamp. Read More

Self-organizing proteins

Under the microscope, an E. coli cell lights up like a fireball. Each bright dot marks a surface protein that tells the bacteria to move toward or away from nearby food and toxins. Using a new imaging technique, researchers can map the proteins one at a time and combine them into a single image.... Read More

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