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Ebola Outbreak 2014 2015 by Dr. Fauci

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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

Pink-pigmented Pseudomonas Aeruginosa

A pink-pigmented strain of Pseudomonas aeruginosa is shown in the picture. This was photographed in University of Colorado Hospital's clinical lab by the microbiology department. The organism is shown on Mueller-Hinton agar for Kirby-Bauer sensitivity testing.

The pigment pyorubin is responsi... Read More

BacterioFiles 162 - Desert Dwellers Densify Dunes

This episode: Spraying cyanobacteria could turn deserts into useful land!


(9.3 MB, 10.13 minutes)


Show notes: 
Ne... Read More

TWiM #87: Avogadro, archaeal fossils, and ICAAC

Hosts: Vincent RacanielloMichael Schmidt, ... Read More

TWiP 80: Daniel in the parasites' den

Vincent and Dickson welcome new TWiP host Daniel Griffin to discuss the association of a new Mycoplasma with trichomoniasis, and to introduce a new feature to the show, a case study.


Hosts: Vincent Racaniel... Read More

TWiP 77: Mixed messages

Vincent and Dickson discuss the exchange of messenger RNAs between a parasitic plant and its hosts.


Hosts: Vincent Racaniello and Dickson Despommier Read More

Buffer Zone Guidelines May Be Inadequate to Protect Produce From Feedlot Contamination

The pathogen Escherichia coli O157:H7 can spread, likely airborne, more than one tenth mile downwind from a cattle feedlot onto nearby produce, according to a paper published ahead of print in Applied and Environmental Microbiology. The high percentages of leafy greens contaminated with E. coli ... Read More

TWiP 69 letters


Richard writes:


Hi Vincent and Dickson,


I enjoy TWIP, and often recommend it to my students. I'm a parasitologist, primarily a Leishmaniac, but I have learnt a lot from TWIP. I find it both more educational and entertaining than Car Talk.


The disc... Read More

TWiP 79: Across the river and into the trees

Vincent and Dickson discuss the spread of P. knowlesi in Malaysia, and how Leishmania parasites protect the sandfly gut from bacterial infection.


Hosts: Vincent Racaniello and&nbs... Read More

Fungus on toilet seat (clearer view)

microbes in the environment: there are about 4 to 5 different colonies of bacteria which is growing in agar plate; sample from library toilet seat. (front view) Read More

BacterioFiles 179 - Functionless Phages Feel Fatiguing

 This episode: Defective phages in bacterial genomes can still have burdensome effects! Why do the bacteria keep them around?


(10.4 MB, 11.3 minutes)


Show notes: 
Read More

SIM Media

Sulfur-indole-motility test (SIM media) results for:
(A) Escherichia coli: Motile***, hydrogen sulfide (-), indole (+)*
(B) Staphylococcus aureus: Non-motile, hydrogen sulfide (-), indole (-)
(C) Salmonella arizonae: Motile, hydrogen sulfide (+)**, indole (-)
(D) Enterobacter aerogenes: Mot... Read More

BacterioFiles 194 - Squirrel Sequence Stops Similar Sickness

This episode: Remnants of viral infection left behind in squirrels' genome may protect them from incoming viruses!


(9.3 MB, 10.1 minutes)


Show notes: 
Jou... Read More

MaConkey Agar (Mac)

Organisms grown on MacConkey Agar at 37 degrees for 24 hours.
-Important Ingredients: crystal violet, bile salts, neutral red (color indicator), lactose
-Differential: used to identify and isolate lactose fermenting G- enteric bacteria mainly Enterobacteriaceae. Strong lactose fermentation pr... Read More

TWiP 81: Living in a wormy world

Vincent, Dickson, and Daniel provide the solution to last week's case study, present a new one, and discuss how immune suppression by nematodes increases tuberculosis fatality in African buffalo.


Hosts: Vin... Read More

Mundo de los Microbios - Episodio 108 - Grace Robiou

Nuevas guías de la Agencia de Protección Ambiental (USEPA) para las aguas recreacionales:  éste es el tópico que discutiremos hoy con Grace Robiou, quien ha trabajado durante los últimos años buscando nuevos indicadores de riesgo que protejan mejor a los bañistas.


Aunque en el mu... Read More

BacterioFiles 165 - Bacillus Biofilms Balk Bilks

This episode: Interview with Jordi van Gestel: cheaters in bacterial communities don't always succeed!


(13.1 MB, 14.25 minutes)


Read More

Small peptides as potential antibiotics

Small peptides attack bacteria in many different ways and may well become a new generation of antibiotics. Biologists at the Ruhr-Universität Bochum (RUB) have been researching how such peptides kill bacterial cells. "It is quite possible that, in ten years time, all of the currently marketed an... Read More

This Bacteria Can Make People See

Serratia marcescens is a bacteria that has earned a bad reputation for infecting people in hospitals. It may deserve an even worse reputation. It might have made people believe, for hundreds of years, that the blood of Christ was miraculously appearing in communion wafers.

Serratia marcescens... Read More
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