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Hand print

Hand print on a large TSA plate from my 8 1/2 year old son after playing outside. Read More

Unknown from Handprint #3

Unknown organism seen on a TSA plate used to do a handprint. Organism was seen on the outside of the imprint so not sure if it came from the hand or was contaminant. Colony was circular, tan/white, rhizoid growth in the center with a smooth margin and mucoid throughout. Read More

Unknown from Handprint #2

Closeup of organism seen on handprint, presumably Bacillus sp. Organism grew out from the center with rhizoid growth, lobate edges, tan coloration, glossy throughout the colony, Read More

Aspergillus clavatus

Picture carefully taken with my iphone under a dissecting microscope. Read More

E. coli gram stain

Gram stain of E. coli showing characteristic G- rods. Read More

Yeast go viral #agarart2015

Unlike human viruses that cause disease, yeast viruses do not cause any obvious illness in yeast. On the contrary, some viruses of yeast are beneficial and produce toxins that kill off competing yeast, allowing their host to thrive. We often think of viruses as agents of death and disease, but... Read More

This is how I commit to Microbial Supremacy!

It's true that I adore microbiology, and I am lucky to teach it each year to my micronauts. So it was time to commit. Here is my second "Microbial Supremacy" tattoo! The artwork is by Peggy Muddles (http://www.redbubble.com/people/thevexedmuddler/works/15659350-microbial-badass-tattoo-full-co... Read More

Christmas tree :-)

Most of the strains used belong to the Bacillus genus and the rest are just random colorful petri dish contaminants. :-)

Author: Rositsa Tashkova, Université de Nantes, France Read More

Serratia flowers

Serratia marcescens can form brilliant red colonies on LB agar due to the synthesis of the secondary metabolite prodigiosin. In the Microbiology teaching lab, we had students create pigment mutants of S. marcescens and these lovely shades of pink and white were collected for analysis. Read More

"E. coli Happens"

E. coli was grown on MacConkey Agar (MAC) at 37 degrees for 24 hour. MAC is a Selective and Differential media used to inhibit G+ growth and some G- bacteria as well as identify and isolate lactose fermenting G- enteric bacteria mainly Enterobacteriaceae. Strong lactose fermentation produces pi... Read More

Pink-pigmented Pseudomonas Aeruginosa

A pink-pigmented strain of Pseudomonas aeruginosa is shown in the picture. This was photographed in University of Colorado Hospital's clinical lab by the microbiology department. The organism is shown on Mueller-Hinton agar for Kirby-Bauer sensitivity testing.

The pigment pyorubin is responsi... Read More

Microbiology Christmas Tree

This is a picture of the Christmas tree in the University of Colorado Hospital Microbiology Department.

The tree is adorned with homemade culture plate ornaments (one for each staff member) and topped with a stuffed Staphylococcus aureus microbe. 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

BacterioFiles 196 - Flagellin Facilitates Flu-shot Function

This episode: Bacteria are important for a good immune response to unadjuvanted influenza vaccines!

(14.6 MB, 16 minutes)

Show notes: 
News... 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

"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


Microorganisms reside everywhere, yet they are too small to be seen with the human eye. New York City (NYC) is a melting pot of cultures - both human and microbial - and every citizen has a personalized microbiome. Collectively, we shape NYC’s microbiome by our lifestyle choices, and this unseen... Read More

Brain infection study reveals how disease spreads from gut

Diagnosis of deadly brain conditions could be helped by new research that shows how infectious proteins that cause the disease spread. Read More

Can You Protect Your Tummy From Traveler's Diarrhea?

It goes by many names: Delhi belly. Montezuma's revenge. The Aztec two-step. But doctors use one not-so-glamorous term: traveler's diarrhea. Read More

Unknown - Identification Help Please

I am in need of some assistance in Identifying a bacteria species. I am unable to locate a match in Bergey's Manual. Our copy is 20 years out of date. I know the photo isnt great, it was taken with a cell phone. The colonies are hot pink and were cultured on TSA slant. It is gram + micrococci, i... Read More
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