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New drugs for bad bugs

Washington University in St Louis chemist Timothy Wencewicz says we’ll stay ahead of antibiotic resistance only if we find drugs with new scaffolds, or core chemical structures. One promising candidate, an antibiotic made by a bacterium than infects plants, caught his attention because it contai... Read More

Basidiobolus haposporus

Basidiobolus haposporus. Adhesive spores forcibly discharged and attached to cover of a petri dish. Lactophenol cotton blue stain Read More

Antimicrobial affect of acidophil actimyces isolated from Azerbaijan's soil against E.coli

This picture proves antagonistic property of acidophil actinomyces against Escherichia coli. These cultures of actinomyces were isolated from Azerbaijan's soil in 2012 by me. Read More

Chromobacterium violaceum, Staphylococcus aureus

Created by: Michelle Vu, Research Associate, BS Microbiology
Isolate: Chromobacterium violaceum, Staphylococcus aureus
Agar: Blood Agar
Incubation Conditions: 24 hours at 37C + 24 hours at Room Temperature

Pictured is Chromobacterium violaceum and Staphylococcus aureus shaped in a valentin... Read More

Raw sewage filtered onto a nucleopore membrane

Raw sewage filtered onto a nucleopore membrane. Note the filamentous bacterium and various rod-shaped bacteria (2000X) Read More

A Bacterial Bioluminescent Valentine's Day

In this short post, I celebrate Valentine's Day with words of light---using bioluminescent bacteria! Read More

Pseudomonas aeruginosa with black extracellular pigment

Pseudomonas aeruginosa isolated from sputum into department of Microbiology - Riuniti Hospital Reggio Calabria .
This strain of Pseudomonas secretes brown/black extracellular pigment: pyomelanin.
Photo from D'Aleo Francesco archive. Read More

Science Comedian Brian Malow at #AAAS

Brian Malow at the Social Media Soiree party during the American Association for the Advancement of Science meeting in Washington, D.C.

Malow was featured in one of the first MicrobeWorld Video episodes about 3 years ago.

Cut and paste this link - http://bit.ly/gTniHl - into your address b... Read More

Urea broth

Urea broth. Demonstrates positive, negative, uninoculated tube (1:6) Read More

Harmful Algal Blooms - Microcystis ehrenbergii

You may notice a green, red or brown film on your favorite boating or swimming area in the summer. This coloring could mean that the water is affected by harmful algal blooms. Harmful algal blooms are an accumulation of tiny organisms known as algae and can release harmful toxins into the enviro... Read More

Serratia marcescens/Escherichia coli mix

Serratia marcescens/Escherichia coli mix grown on TSA for 48 hrs. Serratia marcescens grows red due to prodigiosin and Escherichia coli grows opaque white. Read More

Bacterial colonies lend whole new meaning to "smartphone culture"

A relatively straightforward classroom experiment produces fascinating images by students at the University of Surrey when they imprinted their smartphone onto a bacterial growth medium. Read More

Why are bacteria all the same size

Just when we think we know everything, a story comes along to remind us that there is something fundamental--and seemingly elementary--that we still haven't figured out. “Why are we the size we are? Why are our organs the size they are? Why are the cells in those organs a stereotypical size? Wha... Read More

Live/Dead Stain Microscopy

Tannery tanning fluid sample stained with Live/Dead BacLight under UV light. Either 40x or 100x oil immersion. Green bacteria indicate living cells, while Orange bacteria indicate dead cells. Some of the green cells were moving around even after staining! Read More

Taking out the defender

The in vivo interaction between a Pseudomonas aeruginosa biofilm, on a silicone implant, and the responding polymorphonuclear leukocytes.
Image: SEM imaging depicts the interaction at day 1 post insertion of the implant in the peritoneal cavity of a mouse. The leukocytes (yellow) are damaged wi... Read More

Histoplasma capsulatum

Yeast form of Histoplasma capsulatum in PMN of peripheral blood. Wright stain (900X) Read More

Strange Biology Inspires the Best New Materials

From the shiny, strong nacre that gives abalone shells an unbreakable, opaline sheen, to the goopy mix of proteins fired by a velvet worm that solidify and trap prey upon impact, nature is packed with inspiration for scientists designing new materials.

Waterproof adhesives and self-cleaning s... Read More

Freshman Biology Creative Projects!

I have found that students become involved, energized, and enthusiastic when I give them opportunities to explore topics in my classes using their own creative approaches and interests. So this semester, in my Biology 111 course at the University of Puget Sound, I found that students explored f... Read More

Salmonella

Under a very high magnification of 12000X, this colorized scanning electron micrograph (SEM) revealed the presence of a large grouping of Gram-negative Salmonella typhimurium bacteria that had been isolated from a pure culture. See PHIL 10982 for a black and white version of this image.

How d... Read More

Hyphae and Yeasts

Mixed hyphae and yeasts - PAS stain Read More
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