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Byssochlamys sp.

Byssochlamys sp. Penicillate sporulation (1008X) Read More

photograph of carcass of swine showing lesions of swine erysipelas (b&w)

photograph of carcass of swine showing lesions of swine erysipelas (b&w) 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

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

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

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

Salmonella grown on Salmonella-Shigella (S-S) Agar

The following picture shows the isolated black colonies of Salmonella on Salmonella-Shigella (S-S) Agar. S-S Agar is used as a selective and differential medium for the isolation of Salmonella and some Shigella species. The inclusion of bile salts is to inhibit gram-positive organisms. Ferric ci... Read More

BacterioFiles 213 - Bird Bacteria Bolster Babies

This episode: Hoopoes inoculate their eggs with protective bacteria!


(6.5 MB, 7 minutes)


Show notes: 
News item/ Read More

Microbe vs. Mineral: A Life and Death Struggle in the Desert

The bursts of rainbow colors in this photograph are mesmerizing, yet microbes are fighting for their lives in the background. Michael P. Zach of the University of Wisconsin-Stevens Point, snapped this image of a salt sample he collected in a hot, arid valley near Death Valley National Park in Ca... Read More

Salmonella typhimurium

This photograph depicts the colonial growth pattern displayed by Salmonella typhimurium bacteria cultured on a Hektoen enteric (HE) agar medium; S. typhimurium colonies grown on HE agar are blue-green in color, for this organism is a lactose non-fermenter, but it does produce hydrogen sulfide, (... Read More

Rubella virus virions

This negatively-stained transmission electron micrograph (TEM) revealed the presence of Rubella virus virions, as they were in the process of budding from the host cell surface to be freed into the host’s system, thereby, producing an enveloped virus particle, which means that after budding, the... Read More

Blastomyces dermatitidis

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

Aquaspirillum serpens

A simple stain done on a stock culture of Aquaspirillum serpens to look at cell shape. This culture was grown in TSB at room temperature, ~21 degrees C, for several months. Aquaspirillum is a slow grower normally found in pond water. A characteristic spiral rod can be seen in the center of ... Read More

Mannitol Salt Agar (MSA)

Mannitol Salt Agar (MSA)
•Important Ingredients: Phenol red, mannitol (sugar), 7.5% NaCl
•Differential: between pathogenic S. aureus and S. epidermidis
•Selective: NaCl inhibits non-halophilic organisms. Organism that can grow are halophilic.
•Mannitol Fermentors: fermentation of acid cau... Read More

Trichome

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

Campylobacter bacteria

Campylobacter bacteria are the number-one cause of food-related gastrointestinal illness in the United States. To learn more about this pathogen, ARS scientists are sequencing multiple Campylobacter genomes. This scanning electron microscope image shows the characteristic spiral, or corkscrew, s... Read More

Raw Sewage

Raw Sewage. Cellulose fibers. Note; limited cellulolytic activity Read More

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

Beauty of Ecoli colony in EMB plate

Ecoli isolated from food sample in our laboratory 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
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