Dear Vincent, Dickson and Daniel,
Bacitracin test done on a lawn of Streptococcus pyogenes grown on blood agar. The zone of inhibition around the bacitracin disc, approx 14mm measuring the entire length of the zone, indicates sensitivity. The zone of inhibition is red because the red blood cells did not lyse. Grown for 24 hr... Read More
This episode: Genes taken from bacteria may have been important for the evolution of distinct groups of archaea!
(7.4 MB, 8 minutes)
The arrival in the US of plasmid-mediated resistance to colistin antibiotics, a last line of defense against many gram-negative bacilli, and a quorum sensing system in a eukaryote are topics of this episode hosted by Vincent, Michael, and Michele.
Image (right): Etest used to determin... Read More
One of the first challenges is in properly diagnosing Zika infection. Diagnosis is challenging for several reasons: first, many infected individuals don’t suffer severe symptoms. Those that do have relatively non-specific symptoms of low-grade fever, headaches, and muscle soreness that are somet... Read More
Greetings TWiM crew!
Line inoculation of Micrococcus luteus on a TSA slant showing Filiform, uniform growth, along the margin. Culture was grown for 3 days at 37 degrees, M. luteus usually takes 3+ days for good growth. Read More
This episode: Feeding mice high-fiber diets reduces their risk of allergic airway disease, even across generations!
(12.1 MB, 13.2 minutes)
Many institutions, such as my own, only have one microbiology course. In this second "Mu-Tube" video, I ask my current junior and senior Microbiology students what *they* think first year students ought to know about #MattersMicrobial. I think their opinions are interesting, and will inform my... Read More
Boy, it's a good time to be a dark chocolate lover.
We've noted before the growing evidence that a daily dose of the bitter bean may help reduce blood pressure. There also seems to be a link between a regular chocolate habit and lower body weight.
Now scientists are offering an explanation... Read More
Dear Dr. Schaechter,
First off, I want to thank you for the effort you and your colleagues have invested in Small Things Considered and the podcast TWIM. Back when I had a longer commute to work, I listened more religiously than now, wh... Read More
What happens to us after we die? A decomposing corpse becomes its own mini-ecosystem, hosting insects, scavengers and multitudes of microbes. Microbes from the environment, the corpse, as well as the insects and scavengers are blended together and work to recycle tissues back to t... Read More
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.
The TWiPyzoites solve the case of the Uncommon Parasite, and discuss the role of eosinophils in promoting the growth of Trichinella in skeletal muscle.
Hosts: Read More
An 'exhausted' army of immune cells may not be able to fight off infection, but if its soldiers fight too hard they risk damaging the very body they are meant to be protecting, suggests new research from the University of Cambridge. Read More
The TWiP-scholars solve the case of the Housewife from Kolkata, discuss mutations in the IL17 gene associated with cerebral malaria, and hear a case presentation from guest Michael Libman.
Hosts: Read More
An antimicrobial agent found in common household soaps, shampoos and toothpastes may be finding its way inside human noses where it promotes the colonization of Staphylococcus aureus bacteria and could predispose some people to infection. Researchers at the University of Michigan report their fi... Read More