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Getting Started with MicrobeWorld

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Bacteroides fragilis colonies on blood agar

Bacteroides fragilis colonies on blood agar (1:5) Read More

Klebsiella pneumoniae on blood agar

Klebsiella pneumoniae grown on blood agar for 48 hrs at 37 degree's C. Read More

Corona - but not the kind a good guest brings to your summer picnic

Remember SARS? Or the last time you had a nasty cold? Lay your troubles at this bad-boy's door.
In fact, SARS-CoV - the Corona variant that causes SARS - has the rather unique quality of causing both upper & lower respiratory infections, and gastroenteritis.
Note as well that the Coronavi... Read More

Prion trials and tribulations: Finding the right tools and experimental models

Prions are fascinating, enigmatic, and might teach us not only about rare prion diseases like Creutzfeld-Jakob disease, mad cow disease, or scrapie, but also about other more common neurodgenerative diseases. Two studies published on July 2nd in PLOS Pathogens report progress with novel tools an... Read More

Infected guinea pig eye Shigella - Sereny test

Infected guinea pig eye Shigella - Sereny test Read More

Shoe Swab

Unknown organism isolated from a swab taken off the bottom of a shoe. Students were asked to swab something in the classroom. One swab was done on the bottom of a shoe and incubated on a TSA plate for 48 hrs at 37 degree’s C. The organism was difficult to scrape so a small chunk of the organis... Read More

Photomicrograph of Algae - 1856 by John William Draper

A multitalented scientist and inventor, John William Draper worked as a chemistry professor at the University of New York, where he conducted research in numerous fields, ranging from medicine and philosophy to spectrum analysis and photography. This photograph displaying the physiological chara... Read More

Swarm of paramecia

Swarm of paramecia surrounding an unidentified protozoan. Taken from the Wistreich Collection. Read More

EL NIÑO HEAT SETS OFF WAVES OF DENGUE FEVER

New research shows that epidemics of dengue—caused by a mosquito-borne virus—across southeast Asia appear to be linked to the abnormally high temperatures brought by the El Niño weather phenomenon. Read More

Pseudomonas aeruginosa with pyoverdine extracellular pigment

This strain of Pseudomonas aeruginosa isolated from wound make a green pigment: pyoverdine. Pyoverdine is a fluorescent siderophores for to acquire iron.
Pyoverdine biosynthesis in Pseudomonas aeruginosa and fluorescent Pseudomonads is a complex process.

Credits: dr. Francesco d'Aleo & Robe... Read More

Unwashed vs washed hand

Students in the summer STEM program at Cabrillo (these were college age students) were asked to do a handprint of their unwashed hand then of their hand after washing. This is a before and after of what the majority of the plates looked like. Plates were incubated for 48 hrs at 37 degrees C ... Read More

Chickenpox vaccination does increase shingles cases, but mainly in young adults

Vaccinating one-year-olds against chickenpox could temporarily nearly double the incidence of shingles in the wider population, but in younger adults than previously thought. Read More

Red algae Scagelia

Red algae Scagelia, showing reproductive tetraspores and golden diatoms. 2nd place winner of Olympus BioScapes photomicrography contest 2012.

Credit: Dr. Arlene Wechezak, Anacortes, Washington Read More

New understanding of genetic susceptibility to infections by Candida and Mycobacterium

The discovery of bi-allelic mutations in RORC in patients with candidiasis and mycobacteriosis revealed the pivotal role of RORC in mucocutaneous immunity to Candida and in systemic immunity to Mycobacterium in humans. Read More

Red blood cell infected with malaria parasites

Colorized electron micrograph of red blood cell infected with malaria parasites (blue). The small bumps on the infected cell show how the parasite remodels its host cell. Uninfected cells (red) have smoother surfaces.
Credit: NIAID/RML

Related story: "Scientists Find Genetic Basis for Key Pa... Read More

Blood agar/Hemolysis

Three organisms inoculated onto blood agar, straight line inoculation, to demonstrate hemolysis. From top to bottom:
Streptococcus pyogenes: beta, complete lysis of red blood cells, clear area around colony growth.
Streptococcus bovis: alpha, incomplete lysis of red blood cells, green area ... Read More

Study adds to evidence that viruses are alive

CHAMPAIGN, Ill. -- A new analysis supports the hypothesis that viruses are living entities that share a long evolutionary history with cells, researchers report. The study offers the first reliable method for tracing viral evolution back to a time when neither viruses nor cells existed in the fo... Read More

Beauty of Nocardia asteroides Colonies on Blood Agar

Nocardia asteroides isolation from blood specimen. On culture, chalky white colonies were seen on blood agar. Image courtesy MicrobeWorld user Kyriakos Zaragkoulias, Specialty Registrar (StR) in Medical Microbiology at General Hospital of Thessaloniki “G. Papanikolaou”, Greece.


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Creative "Extra Credit" Projects in Microbiology!

In this blog entry, I explore how students can use their creativity to learn microbiology in innovative and often artistic ways. It makes learning more personal! Read More

Streptococcus pneumoniae

Electron micrograph of type 4 Streptococcus pneumoniae adherent to pharyngeal epithelial cell Read More
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