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Gram stain of mixed culture of cocci and rods

Gram stain of mixed culture of cocci and rods.Streptobacillus morphological arrangement is shown. (Approx X1000). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. 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

Milestones in Microbiology: Bergey's Lab

Alison O'Brien, President at American Society for Microbiology and professor and chair of the Uniformed Services University of the Health Sciences’ (USU) Department of Microbiology and Immunology, in Philadelphia.
Read More

One bad mamma-jamma

The 1918 Spanish flu epidemic was caused by an influenza A (H1N1) virus.
Responsible for more deaths during World War I than all the bombs, bullets, poison gases, & artillery shells used, it killed more than 500,000 people in the United States, and up to 50 million worldwide.
The possible so... Read More

Gram-negative rods

Gram-negative rods. (approx. 1000 X). Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

Sculptures of Biological Viruses Using Computer Parts

Since 1999, Artomatic, a one-of-a-kind multimedia event, involving hundreds of regional artists, performers and volunteers, in Washington, D.C. has been convening annually in the Washington, D.C., area. This past year artist Forrest McCluer culled together a series of sculptures constructed from... Read More

The Hidden Life of Microscopic Fungi

Most mushrooms actually do not produce the visible fruiting bodies known to us as boletus, champignons, or toadstools. Many fungal species are the familiar “mold” and other unappetizing films, or are completely unknown to us. Here, you can discover some of the remarkable shapes and lifestyles of... Read More

"I kissed a plate... and I liked it."

What do you get when you kiss a Petri dish? Bacteria and yeast colonies that grow into a pretty collage composed of different colors and morphologies. This is an LB agar plate incubated at room temperature for several days. Read More

Cryptococcus neoformans

Cryptococcus neoformans in tissue (1000X) Read More

Madurella mycetoma

Madurella mycetoma granule. H & E stain Read More

Colorized low-temperature electron micrograph of a cluster of E. coli bacteria

Individual bacteria in this photo are oblong and colored brown. As an alternative to using antibiotics for fighting E. coli infections in newborn and weaned pigs, scientists are finding promising results from introducing mixes of beneficial bacteria, obtained from other pigs, into the gut of you... Read More

Blastomyces dermatitidis

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

Feeling Blue, Trypanosoma brucei

Trypanosoma brucei, a protozoan parasite, is the causative agent of African sleeping sickness in humans (T. b. gambiense and T. b. rhodesiense) and nagana in cattle (T. b. brucei). These diseases result in much economic hardship and morbidity in Sub-Saharan Africa. The life cycle of these organi... Read More


Pictured is a plant structure called a trichome that was found in a felines' urine sediment collected by cystocentesis. It is surrounded by many cocci and debris. The picture was taken with a smartphone at 400x magnification with no staining. Read More

Spiraled microbe

Photograph of 400X magnified image of biogas digestor sample. A strange spiraled type microbe seen (probably like left handed DNA helix). The microbe is shown with an arrow. Has anyone seen such microbial structure? Read More

Behind the scenes: Recording TWIM 40 at Cold Spring Harbor Laboratory

Here are photographs I took during our visit to Cold Spring Harbor Laboratory to record This Week in Microbiology #40. We roamed around campus scouting locations befo... Read More

Invisible Residents

The Human Microbiome Project has spent two years surveying bacteria and other microbes at different sites on 242 healthy people. The chart below hints at the complex combinations of microbes living in and on the human body.

The New York Times - Science Read More

Whole genome analysis of Chlamydia trachomatis highlights risks with current method of tracking

In a study released today in Nature Genetics, researchers have found that Chlamydia has evolved more actively than was previously thought. Using whole genome sequencing the researchers show that the exchange of DNA between different strains of Chlamydia to form new strains is much more common th... Read More

Legionella pneumophilia in yolk sac of embryonated egg as stained by the Gimenez method

Legionella pneumophilia in yolk sac of embryonated egg as stained by the Gimenez method Read More

Clostridium difficile

This is an image of Clostridium difficile colonies grown on cycloserine mannitol agar after 48 hours.

C. difficile, an anaerobic gram-positive rod, is the most frequently identified cause of Antibiotic-Associated Diarrhea (AAC). It accounts for approximately 15-25% of all episodes of AAC.

... Read More
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