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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

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

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

microbes style

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

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

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

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

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

Bacterial Mat

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

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

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

Octopic cultivation

Cute octopus-like device for anaerobic cultivation of cellulolytic bacteria aimed to replace O2 with argon. Situated at the Faculty of Biology, Moscow State University, Russia. Read More

Activated Eosinophils in Idiopathic Hypereosinophilic Syndrome

Activated eosinophils in the peripheral blood of a patient with idiopathic hypereosinophilic syndrome showing cytoplasmic clearing, nuclear dysplasia, and the presence of immature forms (100x magnification). Credit: NIAID Taken on June 24, 2013 @http://www.flickr.com/photos/niaid/9125007255/

... Read More

Bacillus subtilis

Streak plate isolation showing colonial morphology of Bacillus subtilis on trypticase soy agar (TSA) incubated for 24 hours at 37oC. Note the rough and dry/matte texture characteristic of this organism’s growth. Read More

Yellowstone Caldera, Wyoming

Bacterial mats, golden brown in color, seen at the outer edges of Chromatic Pools. The blue water in the center is the hottest water at ~199 F and cooling to ambient the farther you get from the center. Cyanobacteria grow around 163 F or lower. Read More

Joseph Leidy

JOSEPH LEIDY – 1823-1891

Joseph Leidy (1823-1891), naturalist, comparative anatomist, paleontologist, and microscopist, was dubbed by his biographer as “the last man who knew everything.” Leidy also made substantial contributions to the field of protozoology and is considered America’s first... Read More

colony picture of T. mentagrophytes.

This is colony pic of T. mantagrophytes grows on dermasel media after 10 days of incubation at 30'C. this study is done for our research work from superfical mycoses s suspected cases.specimens taken from trunk as skin scrapping suspected of T. corporis.microscopic pic of this colony shows penci... Read More

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