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Serratia marcescens colonies

Pigmented and non-pigmented parts of Serratia marcescens colonies. Taken from the Wistreich Collection, appearing exclusively on MicrobeWorld. Read More

How do we know what causes an infectious disease? (Part 1)

A brief introduction to how scientists prove that an infectious agent is a cause of disease. It discusses Koch's postulates using the imaginary disease chocolatitis and the imaginary organism Chocolobacter as an example. Read More

Streptococcus

Image of Streptococcus, a type (genus) of spherical bacteria that can colonize the throat and back of the mouth. Stroptococci often occur in pairs or in chains, as shown here.

Tina Carvalho, University of Hawaii at Manoa Read More

BacterioFiles Micro Edition 84 - Latent Loops Limit Lupus

This episode: A viral infection in mice seems to protect against lupus!





Do... Read More

TWiV 161: Concerto in B



Hosts: Vincent Racaniello, Rich Condit... Read More

Borrelia burgdorferi

Borrelia burgdorferi is a spirochete, a class of long, slender bacteria that typically take on a coiled shape. Infection with this bacterium causes Lyme disease.

Credit: Tina Carvalho, University of Hawaii at Manoa, NIGMS photo gallery
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Clostridium difficile

A colour-enhanced scanning electron micrograph image showing a cluster of Clostridium difficile on a surface. Clostridium difficile is a species of Gram-positive bacteria that causes severe diarrhea and other intestinal disease when competing bacteria in the gut flora have been wiped out by anti... Read More

TWiM 22 Letters

Jim writes:

I'm greatly concerned about the harmful effects of nanotechnology. I'm old, but have grand kids, who already have to live with all kinds of junk in the environment. I guess it's a topic that fits in the virology category, too, since are not nanotech-sized parti... Read More

The Role of Non-Food Animals in the Spread of Antibiotic Resistance

On the issue of antibiotic-resistant bacteria and animals, the first thing that comes to mind is livestock and other farm-based animals that are regularly fed antibiotics as growth promoters, but they are not the only source of resistance. Participants discuss studies showing that non-farm anim... Read More

BacterioFiles Micro Edition 89 - Counting Cloud Communities

This episode: Sampling storm cloud microbial communities with hailstones!





... Read More

ARTS triggers apoptosis

Cell showing overproduction of the ARTS protein (red). ARTS triggers apoptosis, as shown by the activation of caspase-3 (green) a key tool in the cell's destruction. The nucleus is shown in blue.

Sarit Larisch and Hermann Steller, Rockefeller University Read More

TWiV 179: Was ist ein Virus?



Hosts: Vincent Racaniello, Alan Dove, Read More

TWiP 34 Letters

Raihan writes:


Hello Professors Racaniello and Despommier,


In TWIP #33, Dr Despommier said that certain parasites do not need receptors to enter cells, while Dr Racaniello then said that all viruses require a receptor for entry. I might be wro... Read More

TWiV 190: The second ferret of the Apocalypse



Hosts: Vincent Racaniello, Alan Dove, and Read More

TWiV 161 Letters

Ayesha writes:


Honourable TWIVnesses!


I heard this series and thought you might dig it for listener pick of the week: h... Read More

TWiV 176 Letters

Richard writes:


Hi Vincent,


Just listened to this weeks twiv, and the q dot dyes you mentioned are also used in electronics. There they are used as a ultra precise phosphor. In that application blue light from LEDs can be re-emitted as red, an... Read More

BacterioFiles Micro Edition 78 - Proving Prions Provide Positives

This episode: Prions may actually help yeast populations survive!





Download... Read More

BacterioFiles Micro Edition 71 - Bright Bacteria Brave Biting

This episode: Some ocean bacteria glow to attract those that eat them!





Dow... Read More

Rotavirus

Note the wheel-like appearance of some of the rotavirus particles. The observance of such particles gave the virus its name ('rota' being the Latin word meaning wheel). Bar = 100 nanometers. Rotaviruses are nonenveloped, double-shelled viruses, making the virus stable in the environment.

Phot... Read More

Introduction to microbiological culture media (video)

Introduction and uses of culture media for growing pathogenic bacteria and fungi
Read More

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