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Enterobacter aerogenes on MacConkey Agar (Mac)

Streak plate isolation of Enterobacter aerogenes grown on MacConkey agar for 24 hours at 37 degree's. Colonies grow pink due to fermentation of lactose. Read More

Achnanthes longipes

Achnanthes longipes (a diatom, Bacillariophyta) (1000x)

Nikon Small World 2012 PHOTOMICROGRAPHY COMPETITION, IMAGE OF DISTINCTION, Dr. Victor Chepurnov, De Water Architect, Ghent, Belgium Read More

Bacterial colonies lend whole new meaning to "smartphone culture"

A relatively straightforward classroom experiment produces fascinating images by students at the University of Surrey when they imprinted their smartphone onto a bacterial growth medium. Read More

These Renderings of HIV Show That a Deadly Virus Can Be Beautiful

For those of us who are normal, non-scientist people, an image of a virus doesn't necessarily hold any meaning. Which floating orb is a healthy cell? And which one is the actual virus? The CGSociety recently invited artists to create renderings of the HIV virus in blood—and the winning images ar... Read More

Yersinia pestis bacteria

Scanning electron micrograph of Yersinia pestis, which causes bubonic plague, on proventricular spines of a Xenopsylla cheopis flea. Credit: National Institutes of Health/Department of Health and Human Services (NIAID) Read More

A Bacterial Bioluminescent Valentine's Day

In this short post, I celebrate Valentine's Day with words of light---using bioluminescent bacteria! Read More

Strange Biology Inspires the Best New Materials

From the shiny, strong nacre that gives abalone shells an unbreakable, opaline sheen, to the goopy mix of proteins fired by a velvet worm that solidify and trap prey upon impact, nature is packed with inspiration for scientists designing new materials.

Waterproof adhesives and self-cleaning s... Read More

Corynebacterium diphtheriae

Corynebacterium diphtheriae on Tinsdale agar 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

Neoscytalidium dimidiatum arthrospore

It is a well recognized uncommon cause of skin and nail infection of the hands and feet . Unlike Dermatophytosis these mould infections are not contagious. There are few reports of invasive infection caused by N. dimidiatum; most infections occurred in immunocompromised hosts. Arthrospores are ... Read More

Mycobacterium smegmatis using transmitted light

Isolated colony of Mycobacterium smegmatis grown on TSA for 96 hrs at 37 degrees C. Margin is lobate with an irregular-rhizoid form. Image taken using transmitted light. Read More

To combat the overuse of antibacterials, stop using the absolutely terrible word, "antibiotic"

There are many reasons why bacteria evolve resistance to antibacterials, but one of the preventable reasons is the over-prescription of antibacterials to patients who don't have bacterial infections. But how to get people to stop asking for antibacterials? My suggestion is to stop using the wor... Read More

The Illustrated Cell

Le Cellule, illus. by Peter Wyss published in Le Livre de Sante by Joseph Handler (Monte Carlo: Andre Sauret, 1967) from the A Journey Round My Skull blog via Maggie Koerth-Baker at BoingBoing.net Read More

Isolating Histoplasma capsulatum

Small park at 7th St. and Pennsylvania Ave, Washington, DC. Histoplasma capsulatum was isolated under trees where starlings roosted Read More

Microphotograph showing scolex of Echinococuus granulosus.

Microphotograph showing scolex and hooklets of Echinococcus granulosus. Read More

Cyanobacterium Anabaena planctonica

Olympus Bioscapes, Honorable Mention, Dr. Petr Znachor, Laboratory of Phytoplankton Ecology, Institute of Hydrobiology,Ceske Budejovice, Czech Republic.

Specimen: Cyanobacterium Anabaena planctonica, Technique: Nomarski contrast, 20x Objective Read More

On a Cellular Level, We Are ALL Overachievers!

In this blog post, I show a science-cartoon by the great "Beatrice the Biologist" that illustrates an important point in my freshman introductory cell and molecular biology course: no matter how tired we might be, we are incredibly busy on a cellular level! Beatrice is a fine artist who underst... Read More

Bacitracin test on Streptococcus pyogenes

Bacitracin test done on a lawn of Streptococcus pyogenes grown on blood agar. The zone of inhibition around the bacitracin disc, approx 14mm measuring the entire length of the zone, indicates sensitivity. The zone of inhibition is red because the red blood cells did not lyse. Grown for 24 hr... 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

Cholera enterotoxin

Rabbit ileal loop, inoculated with cholera enterotoxin and control Read More

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