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TWiV 291: Ft. Collins abuzz with virologists

Vincent, Rich, and Kathy and their guests Clodagh and Ron recorded this episode at the 33rd annual meeting of the American Society for Virology at Colorado State University in Ft. Collins, Colorado.


Hosts: ... Read More

TWiM #81: Cold iron is the master of them all

Hosts: Vincent RacanielloMichael Schmidt, ... Read More

TWiM 81 Letters

Ravi writes:


TWiM & TWiV team,
Keep up the excellent work! I am an electronics engineer who has never studied biological sciences, but now in my 50's, I find your podcasts fascinating. I listen to episodes while working out - a good combination of mental &... 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

Mycobacterium smegmatis Acid Fast Stain

Acid Fast stain done on a mix of Staphylococcus aureus and Mycobacterium smegmatis. Carbol fuchsin was applied to the smear and set over a steaming water bath for 10 min to help penetrate the mycolic acid in the cell wall, then rinsed with acid alcohol which washes the carbol fuchsin out of al... Read More

Slaying bacteria with their own weapons

A chemist at Washington University in St. Louis is studying siderophores, iron chelating molecules released by bacteria during an infection, with the thought of using them to design personalized antibiotic therapy that would avoid the rapid evolution of resistance that plagues antibiotic drug di... Read More

Endospore Stain Bacillus cereus

B. cereus was grown on urea agar for 6 days at 37 degrees C to induce spore formation.
The endospore stain was done using malachite green as the primary stain and safranin as counter the stain. Malachite green was applied to the smear and set over a steaming water bath for 10 min (stain was no... Read More

Love in the lab: Close collaborators

Romance often sparks between colleagues, and scientists are no different. Nature profiles four super-couples who have combined love and the lab.

When physicists Claudia Felser and Stuart Parkin were introduced at a conference on applied magnetics, they felt an immediate attraction. But then, ... Read More

Soil microbiomes can set plant flowering time

Scientists grew Boechera stricta plants in soil inoculated with microbes from natural B. stricta habitats to study the flowering time phenotype.

The technique researchers employed to isolate soil microbes to study their effect on a single plant phenotype can potentially be applied to other st... Read More

Lab-on-a-Chip Tracks Down 'Most Wanted' Microbe

A diagnostic tool that’s about the size of a credit card has identified a highly prized gut microbe.

The microbe contains interesting genetic sequences, but it has proven challenging to culture in the lab.

Researchers used the device, called SlipChip, to isolate microbes from a patient’s g... Read More

The truth behind the '5-Second Rule': When in doubt, throw it out

The burger patty that slides off the plate, the ice cream treat that plops on the picnic table, the hot dog that rolls off the grill – conventional wisdom has it that you have five seconds to pick it up before it is contaminated.

Fact or folklore?

“A dropped item is immediately contaminate... Read More

Sweet Sweet Straw

The calorie free sweetener erythritol is widely used in Asia; it is also gaining popularity in Europe and America. At the Vienna University of Technology, a new cheap method has been developed to produce erythritol from straw with the help of mould fungi.

Erythritol has many great advantages:... Read More

Virus kills triple negative breast cancer cells, tumor cells in mice

A virus not known to cause disease kills triple-negative breast cancer cells and killed tumors grown from these cells in mice, according to Penn State College of Medicine researchers. Understanding how the virus kills cancer may lead to new treatments for breast cancer.

Adeno-associated virus... Read More

Brewing yeasts reveal secrets of chromosomal warfare and dysfunction

Using two yeasts that have been used to brew tea and beer for centuries, researchers at Fred Hutchinson Cancer Research Center have revealed how reproductive barriers might rapidly arise to create species boundaries. Schizosaccharomyces pombe has been used to brew beer in Africa, whereas its clo... Read More

New material improves wound healing, keeps bacteria from sticking

As many patients know, treating wounds has become far more sophisticated than sewing stitches and applying gauze, but dressings still have shortcomings. Now scientists are reporting the next step in the evolution of wound treatment with a material that leads to faster healing than existing comme... Read More

Interview with Prof. Dr. Dwij Raj Bhatta

Respected Sir,

Microbiology World is a bi-monthly e-magazine, which publish articles based on Microbiology and related fields of Life Sciences. Microbiology World has been established in 2013 and has been supported by several organizations.
I, editor in chief of this magazine, would be glad... 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

Proof of life: Reevaluating oldest known Archean trace fossil for indications of early biology

In the hunt for early life, geobiologists seek evidence of ancient microbes in the form of trace fossils – geological records of biological activity – embedded in lavas beneath the ocean floor. Filamentous titanite (a calcium titanium silicate mineral) microtextures found in 3.45 billion-year-ol... Read More

Emergence of bacterial vortex explained

Bacteria in a drop of water spontaneously form a bi-directional vortex, with bacteria near the center of the drop swimming in the opposite direction of bacteria swimming near the edge. New computer simulations, confirmed by a novel experiment, explain how that vortex comes to be.

Click "sourc... Read More

Antibiotic developed 50 years ago may be the key to fighting ‘superbugs’

Scientists at the University at Buffalo are turning to an old class of antibiotics to fight new superbugs resistant to modern medicine.

A $4.4 million grant from the National Institutes of Health will allow UB researchers to develop new dosing regimens for polymyxin antibiotics.

Developed ... Read More

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