TWiM 228: Black in Microbiology with Ninecia Scott and Chelsey Spriggs

Ninecia and Chelsey, two of the founders of Black in Microbiology, join TWiM to discuss the goals of the organization, then we reveal survival of Deinococcus bacteria for 3 years in space, an experiment that addresses the panspermia hypothesis for interplanetary transfer of life.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson, and Michael Schmidt

Guests:  Ninecia Scott and Chelsey Spriggs

Right click to download TWiM#228 (39 MB .mp3, 53 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

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TWiM 227: The light and dark sides of the fungal world

TWiM presents an episode for mycophiles: how bacteria disarm mushroom pathogens, and the role of the CARD9 protein in protective immunity against pulmonary cryptococcosis.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson, and Michael Schmidt

Right click to download TWiM#227 (35 MB .mp3, 48 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

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TWiM 226: Two microbes you might not know

TWiM presents two unusual microorganisms, Erysipelothrix rhusiopathiae, heard by Elio in an episode of Doc Martin, and Roseomonas mucosa, which is being used to treat atopic dermatitis.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson, and Michael Schmidt

Right click to download TWiM#226 (51 MB .mp3, 70 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

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TWiM 225: Lag phase is no slouch

The TWiM team explores how delivery of an enzyme into competitor cells leads to synthesis of (p)ppApp, depletion of ATP, deregulation of metabolic pathways, and cell death, and a refinement of our typical view of bacterial lag phase as a period of nonreplication.

Hosts: Vincent Racaniello, Elio Schaechter, and Michael Schmidt

Right click to download TWiM#225 (46 MB .mp3, 63 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

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TWiM 224: One hundred million year old bacteria

The TWiM team reveals the genetic mysteries of the Dead Sea Scrolls from sequencing of DNA, and 100 million year old living bacteria recovered from marine sediments.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson and Michael Schmidt

Right click to download TWiM#224 (55 MB .mp3, 75 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

Send your microbiology questions and comments to twim@microbe.tv

TWiM 223: The smell of soil

The TWiMmers explore detection of SARS-CoV-2 on surfaces in an ophthalmology examination room, the ability of stressed populations of Yersinia bacteria to survive antimicrobial treatment within host tissues, and how volatile organic chemicals produced by soil microbes attract arthropods which in turn disperse bacterial spores.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson and Michael Schmidt

Right click to download TWiM#223 (58 MB .mp3, 79 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

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TWiM 222: Biosensors in bacteria

Mark Martin joins TWiM to describe nano-sized parasitic bacteria that inhabit humans, and the construction of whole-cell biosensors for detecting arsenic in drinking water.

Hosts: Vincent Racaniello, Elio Schaechter, and Michael Schmidt

Guest: Mark O. Martin

Right click to download TWiM#222 (58 MB .mp3, 79 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

Send your microbiology questions and comments to twim@microbe.tv

TWiM 221: Weapon of mucus destruction, WMD

Colonies of P. aeuginosa (right) and S. aureus (left). Image credit.

TWiM reveals a potential mucus-busting weapon for patients with cystic fibrosis, and bacteria in the intestinal tract that can oxidize cholesterol, leading to lower levels of the lipid in blood.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson and Michael Schmidt

Right click to download TWiM#221 (50 MB .mp3, 69 minutes)

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

Send your microbiology questions and comments to twim@microbe.tv

TWiM 220: From Mars to the vagina

TWiM reveals that methane-producing bacteria might survive beneath the surface of Mars, and identification of a cytopathogenic toxin in a bacterium associated with preterm birth.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson and Michael Schmidt

Right click to download TWiM#220 (32 MB .mp3, 43 minutes)

Subscribe to TWiM (free) on iTunes, Google Podcasts, Stitcher, Android, RSS, or by email. You can also listen on your mobile device with the Microbeworld app.

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Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

Send your microbiology questions and comments to twim@microbe.tv

TWiM 219: Commensal for a healthy skin

The TWiM team discusses eradicating racism in academia and STEM, and a peptide from commensal bacteria that protects skin from damage caused by MRSA.

Hosts: Vincent Racaniello, Elio Schaechter, Michele Swanson and Michael Schmidt

Right click to download TWiM#219 (45 MB .mp3, 62 minutes)

Subscribe to TWiM (free) on iTunes, Google Podcasts, Stitcher, Android, RSS, or by email. You can also listen on your mobile device with the Microbeworld app.

Become a Patron of TWiM!

Links for this episode

Music used on TWiM is composed and performed by Ronald Jenkees and used with permission.

Send your microbiology questions and comments to twim@microbe.tv

About the Hosts of TWiM

Vincent Racaniello, Ph.D. (@profvrr) is Higgins Professor of Microbiology & Immunology at Columbia University Medical Center. He has been studying viruses for over 40 years. He teaches virology to undergraduate and graduate students, as well as medical, dental, and nursing students. His lectures are available online at iTunes University, YouTube, and Coursera.


Michael Schmidt, Ph.D. (TWiM) is the Professor and Vice Chairman of Microbiology and Immunology and Director of the Office of Special Programs at the Medical College of South Carolina. Dr. Schmidt is leading a team of infectious disease specialists from three health sciences centers and engineers from industry.

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