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A microorganism (from the Greek: μικρός, mikros, "small" and ὀργανισμός, organismós, "organism") is a microscopic organism, which may be a single cell or multicellular organism. The study of microorganisms is called microbiology, a subject that began with Antonie van Leeuwenhoek's discovery of m... Read More

Chaetoceros debilis (marine diatom)

Chaetoceros debilis (marine diatom), a colonial plankton organism (250x). 1ST PLACE 2013 PHOTOMICROGRAPHY COMPETITION. Credit: Wim van Egmond, Micropolitan Museum, Rotterdam, The Netherlands

Wim van Egmond compared Nikon’s Small World competition to “a colorful stained-glass window that opens... 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

Rhizopus microsporus

Rhizopus microsporus
It causes human mucormycosis and bovine mycotic abortion.
It is distinguished from R.arrhizus by its shorter stalk, and smaller sporangia and spores.
Variant forms
Var.oligosporus : has elongated columellae ; spores less obviously striated.
Var.rhizopodiformis : has ... Read More

From The Program of 1st Annual Meeting Society of American Bacteriologists, 1899

Wouldn’t you be tempted to attend such a session if it were part of a current-day ASM meeting? The first five papers ever delivered to a meeting of the Society of American Bacteriologist (now the ASM) are so utterly relevant to our concerns that they could be delivered now. No changes to the ti... Read More

Lipid Agar

Lipid Plate/Tributyrin Agar used to test for an organisms ability to produce the exoenzyme lipase which breaks down the lipids in the agar creating a clear zone around the organism. (A) Serratia marcesens, lipid hydrolysis, indicated by a zone of clearing around the growing colony, as well as th... Read More

E. coli colonies on Eosin Methylene Blue agar plate

Isolates colonies of E. coli with distinct green metallic sheen on EMB agar plate. Culture isolated from drinking water sample Read More

Emericella nidulans

The spherical spores produced by the fungus Emericella nidulans are coated in a thin layer of the protein hydrophobin. Hydrophobin ensures that water rolls off the spores. Other fungi, such as mushrooms, also have a layer of hydrophobin on their caps. BASF researchers have succeeded in transferr... Read More

Streptococcus pyogenes on blood agar

Streak plate of Streptococcus pyogenes (incubated @ 37 degrees C for 48 hrs) showing beta hemolysis, complete lysis of red blood cells, around the isolated colonies. Image taken using transmitted light. Read More

Physar polycephalum

This is a slime mold by the name of Physarum polycephalum. Part of him crept out of the petri dish that had been mistakenly written on with a blue wet erase marker. During growth, I wrap these plates up in foil because the slime mold needs complete darkness to grow. The foil and the humidity ... Read More

Dictyostelium discoideum fruiting body I

The life cycle of D. discoideum begins as spores that are released from a mature fruiting body. Read More

DNase Agar

DNase agar can be used to differentiate between potentially pathogenic S. aureus and other Staphlococcus by looking for the presense of the exoenzyeme DNase. After growth for 24-48 hrs 1N HCL is added to the agar plate. Addition of HCL precipitates DNA in the media causing cloudiness unless t... Read More

Unknown Agar Contaminate

Unknown contaminant found on a TSA plate after being in the refrigerator for 1 month. Organism had grown throughout the media, was pale yellow and mucoid. Read More

Streptococcus pyogenes Gram Stain

Gram stain done on S. pyogenes showing the characteristic long G+ streptococcus chains. Culture grown on blood agar for 48 hrs at 37 degree’s C. 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

Dictyostelium discoideum fruiting body II

The life cycle of D. discoideum begins as spores that are released from a mature fruiting body. Read More

Mycobacterium smegmatis line inoculation

Line inoculation of Mycobacterium smegmatis on a TSA slant showing friable, dry crusty, growth. Culture was grown for 3 days at 37 degrees. 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

Novel Coronavirus Particles

Transmission electron micrograph of novel coronavirus particles, colorized in yellow.

Credit: NIAID

http://www.flickr.com/photos/niaid/8618697423/in/photostream/
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