TWiM 231: It’s a microbe-eat-microbe world

Mark Martin returns to TWiM for a discussion of a predatory bacterium appropriately named Vampirococcus lugosii, and Elio reveals how bacteria can be used on the International Space Station to efficiently extract rare earth elements in microgravity.

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

Guest: Mark O. Martin

Right click to download TWiM #231 (41 MB .mp3, 56 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 230: Ancient bacterial DNA

In this episode of TWiM, control of Campylobacter in raw chicken by zinc oxide nanoparticles in packaging material, and Salmonella enterica genomes from a 16th century epidemic in Mexico.

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

Right click to download TWiM #230 (41 MB .mp3, 56 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 229: Dirt is not simple

In this episode of TWiM, the hidden biochemical diversity in soil-dwelling Actinobacteria that could lead to a second Golden Era of antibiotic discovery, and structures of glideosome components reveals the mechanism of gliding in apicomplexan parasites.

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

Right click to download TWiM #229 (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 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.

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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)

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.

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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)

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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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

The Hosts of TWiM

Petra Levin, Ph.D.


Michele Swanson, Ph.D.


Michael G. Schmidt, Ph.D.


Vincent Racaniello, Ph.D.


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