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Partial Acid-Fast stain of Cryptosporidium species

Cryptosporidium (Crypto) is a parasite that causes diarrheal disease. Crypto can live in the intestine of humans and animals and is passed in the stool of an infected person or animal. This parasite is very resistant to chlorine-based disinfectants and is protected by an outer shell that allows ... Read More

Metallic Sheen in m Endo Agar

I am Sagar Aryal, Global Outreach Member of ASM, currently studying M.Sc. Medical Microbiology at St. Xavier's College, Kathmandu, Nepal.
This is the picture of presence of metallic sheen in m Endo Agar while detecting the coliforms in different water sample of kathmandu valley by membrane fil... Read More

Unknown Fungal Contaminant/View 2

Unknown airborne fungal isolated contaminant found on BEA. BEA plate was incubated for 2 months at 4 degrees C once fungal growth was seen. Spore formation can be seen throughout the circular colony. The single colony covered ¼ of the plate. Image highlights the center growth of the colony. Read More

Aspergillus spp.

I took this picture during my miniresearch project in Bs (Hons).I use this spp and trichoderma to controle other plant pathogenic fungi...and I got great result from it.... 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 ar... Read More

Bed Bug (Cimex species)

Shown here is a bug that was sent for our lab for identification. It was identified as Cimex species, also known as the common bed bug. The two most common species that use humans as a host are C. lectularius and C. hemipterus. All adult and nymphal stages of this organism need to take blood mea... Read More

Unknown Fungal Contaminant/TSA

Unknown airborne fungal isolated contaminant found on TSA. TSA plate was incubated for 2 months at 4 degrees C once fungal growth was seen. Concentric rings of color (pink, green and white) can be seen throughout the colony with smaller colonies seen around the white edges of the colony due to s... Read More

Unknown Fungal Contaminant/TSA #2

Two unknown airborne fungal isolated contaminant found on TSA. TSA plate was incubated for 2 months at 4 degrees C once fungal growth was seen. Concentric rings of color (pink/peach, green and white) can be seen throughout the colonies. Read More

Nocardia asteroides on Gram stain

Presence of Gram-positive, partially acid-fast rods, which have grown in branching chains resembling fungal hyphae. (Gram stain; original magnification, ×100). Image courtesy MicrobeWorld user Kyriakos Zaragkoulias, Specialty Registrar (StR) in Medical Microbiology at General Hospital of Thessal... Read More

A true cell-fie!

We all know about selfies, made popular by the camera in our cell phone. Well, here is the *real* deal - the 'cell-fie'. It's a photograph of my cell culture incubator full of stacks of plates in which HeLa cells are growing - and it's complete with my reflection. Read More

Fungal contaminant close up

Fungal contaminant, presumably airborne, seen on a TSA plate after 1 month at refrigerated temperatures. Close up image highlights exudate, water droplets due to respiration. Read More

Actinomycetes

Cream coloured actinomycetes Read More

The bioluminescent bacteria

Growth of the gram negative bacteria Vibrio fischeri expressing bioluminescence as a result of the symbiotic interaction with Euprymna scolopes. You can see the plate without shining and glowing in the dark. The Form is the mascot of the University of Puerto Rico at Rio Piedras campus. Read More

Aggregates of symbiotic/ commensal spiroplasma-like organisms (SLOs) in the midgut

Spiroplasmas are bacteria in the Class Mollicutes that are frequently associated with insects and/or plants. This confocal laser scanning micrographs show aggregates of symbiotic/ commensal spiroplasma-like organisms (SLOs) in the midgut (mg) and filter chamber (fc) of a leafhopper, Dalbulus mai... Read More

Spectacular Microscopic Art Is Also World-Changing Science

Fernan Federici’s microscopic images of plants, bacteria, and crystals are a classic example of finding art in unexpected places.

A couple years ago, Federici was working on his Ph.D. in biological sciences at Cambridge University studying self-organization, the process by which things organi... Read More

Salmonella on HEK

I'm a micro newbie! I just finished school this year! I grew this in my final clinical rotation and I thought it was beautiful! Read More

Environmental Swab/Bottom of Shoe #2

Close up view of the edges of an unknown bacteria swabbed form the bottom of a shoe, possible Bacillus, on TSA exhibiting spreading and rhizoid growth. The pigment is opaque white-beige with a mucoid surface towards the center of the colony and a matte surface towards the edges. Note: transmit... Read More

Bed bug bite pattern

Typical bed bug bite pattern, 3-5 bites clustered in a zigzag pattern also know as the breakfast, lunch, dinner pattern. Image taken 5 days after exposure. Read More

Bacterial Mat

Yellowstone caldera, Wyoming. Golden brown thermophilic cyano-bacteria seen in the waters surrounding one of the hydrothermal vents. Read More

Teaching Freshmen about Transformation, Drug Resistance, and Gene Regulation!

In this blog post, I describe how I use the commonly available pGLO plasmid to teach freshman students basic concepts about transformation, receptor recognition, drug resistance mechanisms, and gene regulation. Oh, and fluorescence via GFP! Read More
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