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Getting Started with MicrobeWorld

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Dangerous Rendezvous

A macrophage (pale brown) interacts with Borrelia cells (blue), the spirochete bacteria that cause Lyme disease. Although the outer membrane of Borrelia contains a strong antigen, the OspC protein, the bacterium successfully evades the human immune system by hiding out in places less accessible ... Read More

The #LuxArt2015 Art Competition By My Students!

Because of all the recent interest in "microbiological art," I decided to challenge my Biology 350 students to "paint" using luminous bacteria. We have a balloting process, tallied the results, and made some appropriate awards! I think the world of my students, and I hope you enjoy this view i... Read More

mycobacterium smegmatis, rough surface on penassay agar

mycobacterium smegmatis, rough surface on penassay agar 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

Colorized low-temperature electron micrograph of a cluster of E. coli bacteria

Individual bacteria in this photo are oblong and colored brown. As an alternative to using antibiotics for fighting E. coli infections in newborn and weaned pigs, scientists are finding promising results from introducing mixes of beneficial bacteria, obtained from other pigs, into the gut of you... Read More

Madurella mycetoma

Madurella mycetoma granule. H & E stain 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

Absidia corymbifera

Absidia corymbifera in a transplantable 'tumor' of the mouse Read More

A dangerous bridge for Serratia.

Serratia spp. are widely distributed in nature. Serratia marcescens is the most common Serratia sp. associated with human disease, followed by strains of the S. liquefaciens complex: S. liquefaciens, S. grimesii and S. proteamaculans. The clinical significance of these species is largely unknown... Read More

Escheria coli in spinal fluid - gram stain

Escheria coli in spinal fluid - gram stain Read More

Unknown environmental Contaminant on blood agar plate streaked with S. pyogenes

A streak plate of Strep pyogenes on blood agar, stock culture used for class, was kept at room temp for 1 month. Before disposal a contaminant, presumably environmental, was seen on the plate. The pigment was opaque tan/yellow and with a mucoid surface. Lobate marigins with raised irregular-rh... Read More

Swarming Motility of Pseudomonas aeruginosa

Strain: Pseudomonas aeruginosa PA14
Medium: M8 minimal medium agar plates
Incubation Conditions: 48 hours at 37°C
Pseudomonas aeruginosa is a gram-negative, rod-shaped and monoflagellated bacterium that has an incredible nutritional versatility. Swarming motility, a flagellum-dependent behavi... Read More

Zachary Copfer Blends Bacteria And Photography In Bacteriography Series (PHOTOS, VIDEO)

One of our long-running goals at HuffPost Arts & Culture is to eliminate the unnecessary divide that has so long plagued the arts and sciences. So we were overjoyed to stumble upon the work of microbiologist-cum-photographer Zachary Copfer, who has turned a traditional artistic practice into a l... Read More

Fusobacterium mortiferum

This is a picture of a Gram stain of an anaerobic blood culture. This pleomorfic bacteria, were Gram negative filamentous bacilli with large round bodies. The identification by MALDI-TOF was Fusobacterium mortiferum. The patient has pancreatitis. I agree if you want to share this picture, since ... Read More

Two different proteins produced by anthrax bacteria, Protective Antigen, Lethal Factor

A computer model shows side and top views of two different proteins produced by anthrax bacteria. The green molecule is "protective antigen" (PA), which spontaneously forms pores that penetrate organic membranes such as cell walls. The yellow molecule is "lethal factor (LF)." When a voltage is a... Read More

Mining Marine Microbes for New Drugs

This slideshow outlines the work of WHOI scientists Tracy Mincer and Kristen Whalen in the quest to beat antibiotic resistance through bioprospecting in the ocean. Read More

Helicobacter fennelliae from blood culture

Helicobacter is a Gram-negative rod with a helical shape on gram stain. The most known strain is H. pylori, which causes ulcers and chronic gastritis and is said to affect up to 50% of the human population. This particular strain, Helicobacter fennelliae is most commonly found in the feces an... Read More

Legionella pneumophilia in yolk sac of embryonated egg as stained by the Gimenez method

Legionella pneumophilia in yolk sac of embryonated egg as stained by the Gimenez method Read More

Streptococcus pneumoniae mucoid strain

Streptococcus pneumoniae cells are Gram-positive, lancet-shaped cocci. Usually, they are seen as pairs of cocci, but they may also occur singly and in short chains. In this photo a mucoid strain on blood agar showing alpha hemolysis (green zone surrounding colonies). Note the zone of inhibition ... Read More

Fruticose lichen

A fruticose (leaflike) lichen. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More
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