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TWiM 75 Letters

 


Timothy writes:


Hello TWiMsters! I recently discovered the trifecta that is the TWi series, and now I can’t get enough of your discussions of all things micro. For graduate students like myself, keeping up with the scientific literature can all too easi... Read More

Soap Compound Could Make It Easier For Staph Bacteria To Colonize In Your Nose

A common ingredient in antibacterial soap can be found in some people's noses, and the presence of this ingredient could be promoting the colonization of Staph bacteria, according to a small new study in the journal mBio.

Researchers from the University of Michigan found triclosan in the nasa... Read More

TWiV 277: My podcast Vinny



Hosts: Glenn Rall, Ann Skalka, and  Read More

Physarum polycephalum Different view

Physarum polycephalum, slime mold, grown in a large perti plate on moist paper towels using oatmeal as the food source. Culture was grown in the dark at room temperature. The paper towel was moistened every day with tap water. After 3 week’s the culture formed sporangia (fruiting bodies). Image ... Read More

This Spinning Disk Can Detect Salmonella In 30 Minutes

Analytical Chemistry Researchers have created a spinning disk that can quickly tell--within 30 minutes--if food samples contain Salmonella. The most widely-used method to test for the pathogen involves growing out samples on petri dishes and can take days so this has potential to be much quicker... Read More

Florida Bill Would Combat Superbug Threat

A bill to track drug-resistant infections has been introduced in Florida, inspired in part by FRONTLINE’s Hunting the Nightmare Bacteria.

The bill, sponsored by Rep. Janet Adkins, a Republican, requires the state health department to maintain an online record of the type and location of any a... Read More

Micrococcus luteus

Micrococcus luteus grown on TSA for 96 hrs. Read More

TWiM 76 Letters

Geoffrey writes:


Doctors:

I just got around to listening to episode 12 “Photothermal Nanoblades and Genome Engineering”. Your comment that it would need to be scaled up before it was practical for some of you to use intrigued me. I did a quick Google sear... Read More

Arctic bacteria gene swap to detoxify mercury

On the list of substances you really don’t want to mess with, elemental mercury is pretty high up. Inhalation or absorption of the volatile metal can quickly lead to irreversible poisoning. Unfortunately, Hg is also a hallmark of industrial society.....Mercury-resistant bacteria carry a collecti... Read More

New childhood TB cases double earlier estimates

esearchers from Harvard-affiliated Brigham and Women’s Hospital (BWH) and Harvard Medical School (HMS) have estimated that around 1 million children contract tuberculosis (TB) annually — twice the number previously thought to have the disease and three times the number of cases diagnosed every y... Read More

New yeast species travelled the globe with a little help from the beetles

Researchers from the National Collection of Yeast Cultures (NCYC) at the Institute of Food Research (IFR) have identified a new globe-trotting yeast species that lives on tree-associated beetles. This new species demonstrates the importance of preserving biodiversity, as yeasts like this may hel... Read More

TWiP 70 letters


Robin writes:


Cysticercosis.


While it is true that Taenia saginata tends to be benign as helminthic infestations go in humans, the same cannot be said for Taenia solium.


In both cases, ingestion of (encysted) larvae leads to enteric infestation wi... Read More

The sorceress’s apprentice

ANYONE who walks in the woods will be familiar with witches’ brooms (pictured). Many trees sport these bushy tumours, which have a variety of causes. An important one is a group of bacteria called phytoplasma that are, in turn, carried from plant to plant by sap-sucking insects such as leafhoppe... 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

Shifting evolution into reverse promises cheaper, greener way to make new drugs

By shifting evolution into reverse, it may be possible to use “green chemistry” to make a number of costly synthetic drugs as easily and cheaply as brewing beer. Normally, both evolution and synthetic chemistry proceed from the simple to the complex. Small molecules are combined and modified to ... Read More

Probiotics not for colic? A response

This week a study published in the British Medical Journal, and reported in the Daily Mail, has reported that a strain of bacteria known as Lactobacillus reuteri DSM 17938 is not effective in helping to reduce symptoms of colic in babies.

However here we examine the nature of the study, and i... Read More

Stanford bioengineer develops a 50-cent paper microscope

The Foldscope is a fully functional microscope that can be laser- or die-cut out of paper for around 50 cents.

This bookmark-sized microscope can be assembled in minutes, includes no mechanical moving parts, packs in a flat configuration, is extremely rugged and can be incinerated after to s... Read More

Antibiotics Have Turned Our Bodies From Gardens Into Battlefields

We’re in the midst of an extinction crisis, and it doesn’t involve Siberian tigers. Microbiologist Martin Blaser of New York University School of Medicine says that many species of germs are disappearing from our bodies—and that’s a problem. In his new book, Missing Microbes: How the Overuse of ... Read More

TWiV 280: Post viral



Hosts: Vincent Racaniello, Dickson Despommier Read More

Tube morphology

Three organisms inoculated in TSB to look at tube morphology. From left to right:
Staphylococcus aureus: flocculent growth/turbid, growth throughout the tube.
Mycobacterium smegmatis: pellicle, growth at the top of the tube. M. smegmatis tends to stick to the tube and grow up the side.
Ba... Read More

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