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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

10 fun facts about antibiotics

This poster has ten (10) mildly interesting facts about antibiotics, just in case you needed a poster or handout for Antibiotic Awareness Week (Nov 18-24, 2013). You can download PDF at "source" URL, above. Please feel free to share this graphic with your students, classmates, colleagues, frien... 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

Escherichia coli on MacConkey Agar

Escherichia coli isolated from a patient with diarrhea on MacConkey Agar.
Its simply beautiful, one of the first isolations I made. Read More

The life cycle of the malaria parasite (animation)

View an interactive animation of the life cycle of the malaria parasite, of the genus Plasmodium. The lifecycle of the malaria parasite is split between female mosquitoes and humans. In the mosquito gut, the parasites complete sexual reproduction and then multiply rapidly to produce many more p... Read More


Neurons and biological shapes is a common theme in the works of the artist Maria Penil. Here she painted with yellow Nesterenkonia, orange Deinococcus and Sphingomonas isolated for their attractive colors as contaminants in the Berkmen lab. After growing the plates for 2 days at 30C, the artist ... Read More

E. coli gram stain

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

Klebsiella oxytoca on MacConkey Agar

An isolated Klebsiella oxytoca on MacConkey Agar from a patient with diarrhea. Look at its mucous appearance a characteristic of most Klebsiella. Read More

Endospore Stain Bacillus cereus

B. cereus was grown on urea agar for 6 days at 37 degrees C to induce spore formation.
The endospore stain was done using malachite green as the primary stain and safranin as counter the stain. Malachite green was applied to the smear and set over a steaming water bath for 10 min (stain was no... Read More

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

Aspergillus clavatus

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

Harvest Season

Saccharomyces cerevisiae is a species of yeast. It is the active agent responsible for our most basic foods - bread, wine, and beer since ancient civilizations. It has been long since humans have tried to understand how to make them more productive. However, it was not until the Genomic Era that... Read More

Cell to Cell

Bacteria were 'painted' on agar and sealed in epoxy. Work by Maria Penil in the Berkmen lab Read More

SIM Media

Sulfur-indole-motility test (SIM media) results for:
(A) Escherichia coli: Motile***, hydrogen sulfide (-), indole (+)*
(B) Staphylococcus aureus: Non-motile, hydrogen sulfide (-), indole (-)
(C) Salmonella arizonae: Motile, hydrogen sulfide (+)**, indole (-)
(D) Enterobacter aerogenes: Mot... Read More


The bug lives harmlessly in the noses of about a third of us. But it can turn rogue, causing skin infections—or worse. Heavy use of antibiotics since the middle of the last century has prompted the evolution of deadly superbug strains. Photograph by Martin Oeggerli, with support from School of L... Read More

E.coli on MacConkey Agar (Mac)

Streak plate isolation of E. coli on MacConkey Agar grown for 24 hrs at 37 degrees. E. coli demonstrates strong lactose fermentation indicated by the bright pink halo, bile precipitant around the colonies, and pink colony growth. Read More

ESLB strain of Klebsiella spp

phenomenon called "champagne cork"
have waited half year to catch a strain like that. Read More

Slime mold Arcyria denudata

Arcyria called Cotton Candy Slime. A Myxomycetes 1 mm tall. Read More
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