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This Week in Microbiology

TWiM 9: Bean sprouts and E. coli O104:H4

16 June 2011 by Vincent Racaniello

bean sproutsHosts: Vincent Racaniello, Cliff Mintz, and Michael Schmidt.

On episode #9 of the podcast This Week in Microbiology, Vincent, Cliff, Elio, and Michael review the outbreak of bloody diarrhea and hemolytic uremic syndrome in Germany caused by Shiga toxin-producing Escherichia coli O104:H4.

[powerpress url=”http://traffic.libsyn.com/twimshow/TWiM009.mp3″]

Click the arrow above to play, or right click to download TWiM #9 (53 MB, .mp3, 76 minutes).

Subscribe to TWiM (free) on iTunes, Zune Marketplace, via RSS feed, by email or listen on your mobile device with the Microbeworld app.

Links for this episode:

  • Ecocyc, a database on E. coli
  • E. coli outbreak investigations at CDC
  • Discussion of E. coli origin (Biofortified)
  • Outbreak update at Eurosurveillance
  • Summary of outbreak at ProMedMail
  • More evidence points to sprouts (CIDRAP)
  • Phage on the rampage (NatureNews)
  • Letters read on TWiM #9

Send your microbiology questions and comments (email or mp3 file) to twim@microbe.tv, or call them in to 908-312-0760. You can also post articles that you would like us to discuss at microbeworld.org and tag them with twim.

Filed Under: This Week in Microbiology Tagged With: bean, bloody, diarrhea, e.coli, Germany, hemolytic, o104:h4, Shiga, sprouts, syndrome, toxin

TWiM 8: Live in NOLA

3 June 2011 by Vincent Racaniello

This Week in Microbiology #8Hosts: Vincent Racaniello, Michael Schmidt, Stan Maloy, Andreas Baümler, Nicole Dubilier, and Paul Rainey.

Vincent, Michael, and Stanley recorded episode #8 of the podcast This Week in Microbiology live at the 2011 ASM General Meeting in New Orleans, with guests Andreas Baümler, Nicole Dubilier, and Paul Rainey. They spoke about how pathogens benefit from disease, symbioses between chemosynthetic bacteria and marine invertebrates, and repetitive sequences in bacteria.

[powerpress url=”http://traffic.libsyn.com/twimshow/TWiM008.mp3″]

Click the arrow above to play, or right click to download TWiM #8 (60 MB, .mp3, 87 minutes).

Subscribe to TWiM (free) on iTunes, Zune Marketplace, via RSS feed, by email or listen on your mobile device with the Microbeworld app.

Links for this episode:

  • Salmonella invasion from the gut lumen into tissues (PLoS Pathogens)
  • Symbiotic diversity in marine animals (Nature Rev Micro)
  • REPINs, a new family of mobile DNA in bacteria (PLoS Genetics)
  • Letters read on TWiM #8
  • Video of TWiM #8 – view below

 

Send your microbiology questions and comments (email or mp3 file) to twim@microbe.tv, or call them in to 908-312-0760. You can also post articles that you would like us to discuss at microbeworld.org and tag them with twim.

Filed Under: This Week in Microbiology Tagged With: andreas, ASM, bacteria, baumler, benefit, chemosynthetic, disease, dubilier, evolution, gastroenteritis, general, invertebrates, live, marine, meeting, new orleans, nicole, pathogens, paul, rainey, repetitive, salmonella, sequences, symbioses, virulence

TWiM 7 – Cycles of life and death, light and dark

19 May 2011 by Vincent Racaniello

cyanobacteriaHosts: Vincent Racaniello, Margaret McFall-Ngai, Cliff Mintz, Elio Schaecter, and Michael Schmidt.

On episode #7 of the podcast This Week in Microbiology, Vincent, Cliff, Elio, Margaret, and Michael discuss programmed cell death in E. coli, and the daily synthesis and degradation of enzymes needed for photosynthesis and nitrogen fixation by cyanobacteria.

[powerpress url=”http://traffic.libsyn.com/twimshow/TWiM007.mp3″]

Click the arrow above to play, or right click to download TWiM #7 (44.5 MB, .mp3, 64 minutes).

Subscribe to TWiM (free) on iTunes, Zune Marketplace, via RSS feed, by email or listen on your mobile device with the Microbeworld app.

Image of Cyanobacteria in Lake Littoistenjärvi by Stefe via flickr

Links for this episode:

  • E. coli extracelluar death factor EDF
  • mRNA cleavage by MazF toxin
  • Myxococcus programmed cell death
  • Using toxins in antimicrobial bacteriophage
  • Death as an option (Small Things Considered)
  • Cycling of metalloenzyme inventories in Crocosphaera watsonii (PNAS)
  • Growing a green future (Small Things Considered)
  • Letters read on TWiM #7

Send your microbiology questions and comments (email or mp3 file) to twim@microbe.tv, or call them in to 908-312-0760. You can also post articles that you would like us to discuss at microbeworld.org and tag them with twim.

Filed Under: This Week in Microbiology Tagged With: bacteria, crocosphaera, cyanobacteria, ecoli, extracellular death factor, microbe, nitrogen fixation, nitrogenase, photosynthesis, programmed cell death, toxin-antitoxin

TWiV and TWiM live at ASM General Meeting

11 May 2011 by Vincent Racaniello

twiv twim live 2011 asmgmThe General Meeting of the American Society for Microbiology will take place in New Orleans from 21-24 May 2011. This annual meeting covers fundamental microbial cell biology, genetics and physiology, environmental and applied microbiology, microbial ecology, pathogenesis, clinical microbiology, and infectious diseases. This year both This Week and Virology and This Week in Microbiology will be broadcast live from the meeting.  TWiM will air on Sunday, May 22, and TWiV will air on Monday, May 23, both at 2 pm CDT, in Room 232 of the Ernest N. Morial Convention Center in New Orleans.

Meeting attendees are welcome to attend and watch the live TWiV and TWiM and submit comments and questions during the show. The podcasts will be broadcast live and archived online at UStream.tv, at MicrobeWorld, and virology blog.

Here are the participants for ASM-GM TWiM and TWiV:

Sunday, 22 May, 2:00 p.m., CDT – This Week in Microbiology with Vincent Racaniello and friends

  • Stanley Maloy, Ph.D., Professor Dean, College of Sciences Associate Director, Center for Microbial Sciences, San Diego State University
  • Michael Schmidt, Ph.D., Professor and Vice Chairman of Microbiology and Immunology, Director, Office of Special Programs, Medical University of South Carolina
  • Nicole Dubilier, Ph.D., Leader of the Symbiosis Group, Max Planck Institute for Marine Microbiology
  • Andreas J. Bäumler, Ph.D., Professor and Vice Chair of Research, Department of Medical Microbiology and Immunology, University of California, Davis
  • David Aronoff, M.D., Assistant Professor, Department of Microbiology & Immunology, University of Michigan
  • Paul Rainey, Ph.D. Professor of Evolutionary Genetics, New Zealand Institute for Advanced Study, Massey University Auckland, Principal Investigator, Allan Wilson Centre for Molecular Ecology & Evolution, and Visiting Professor, Hopkins Microbial Diversity Program, Stanford

Monday, 23 May, 2:00 p.m., CDT – This Week in Virology with Vincent Racaniello and friends

  • Roger Hendrix, Ph.D., Distinguished Professor, Department of Biological Sciences, University of Pittsburgh
  • Harmit Malik, M.D., Associate Member of the Fred Hutchinson Cancer Research Center and Affiliate Assistant Professor, Genome Sciences, University of Washington School of Medicine
  • Rachel Katzenellenbogen, M.D., Assistant Professor, Pediatrics-Section of Adolescent Medicine, University of Washington School of Medicine

 

Filed Under: This Week in Microbiology, This Week in Virology Tagged With: asm-gm, live podcast, microbiology, twim, TWiV, viral, virology, virus

TWiM 6: Antibacterial therapy with bacteriophage: Reality or fiction?

6 May 2011 by Vincent Racaniello

bacteriophage modelHosts: Vincent Racaniello, Cliff Mintz, Michael Schmidt, and Elio Schaecter

On episode #6 of the podcast This Week in Microbiology, Vincent, Cliff, Michael and Elio review the use of bacteriophages to manage infections, and the presence of antibiotic resistance genes in bacteriophages from urban sewage and river water.

[powerpress url=”http://traffic.libsyn.com/twimshow/TWiM006.mp3″]

Click the arrow above to play, or right click to download TWiM #6 (57 MB .mp3, 82 minutes).

Subscribe to TWiM (free) on iTunes,  Zune Marketplace, via RSS feed, by email or listen on your mobile device with the Microbeworld app.

Links for this episode:

  • Potential bacteriophage applications (Microbe)
  • Revived interest in bacteriophages (Current Biology)
  • Pulmonary bacteriophage therapy for Pseudomonas infections (PLoS One)
  • Bacteriophage therapy for chronic otitis (Clin Otolaryngology)
  • Aggregatibacter actinomycetemcomitans bacteriophage capable of lysing biofilm (AEM)
  • Clinical trials using bacteriophage
  • Antibiotic resistance genes in environmental bacteriophages (PLoS One)
  • Letters read on TWiM #6

The model of bacteriophage T4 shown in the photo is described here.

Send your microbiology questions and comments (email or mp3 file) to twim@microbe.tv, or call them in to 908-312-0760. You can also post articles that you would like us to discuss at microbeworld.org and tag them with twim.

Filed Under: This Week in Microbiology Tagged With: antibiotic, bacteriophage, genes, infections, manage, microbiology, presence, resistance, river, sewage, water

TWiM 5: Mercury-methylating Desulfovibrio and antimicrobial nanoparticles

20 April 2011 by Vincent Racaniello

desulfovibrio biofilmHosts: Vincent Racaniello, Cliff Mintz, Michael Schmidt, and Ronald Atlas.

Vincent, Cliff, Michael and Ron discuss the genome sequqnce of a mercury-methylating bacterium and the antimicrobial effects of nanoparticles.

[powerpress url=”http://traffic.libsyn.com/twimshow/TWiM005.mp3″]

Click the arrow above to play, or right click to download TWiM #5 (52.5 MB .mp3, 76 minutes).

Subscribe to TWiM (free) on iTunes,  Zune Marketplace, via RSS feed, by email or listen on your mobile device with the Microbeworld app.

Image of Biofilm of Desulfovibrio desulfuricans by PNNL – Pacific Northwest National Laboratory via flickr

Links for this episode:

  • Genome sequence of a mercury-methylating Desulfovibrio strain
  • Dusulfovibrio commentary in ScienceDaily
  • Review on the genus Desulfovibrio (pdf)
  • Perturbation of an Artic soil microbe community by nanoparticles
  • Nanoparticles and microbes – commentary at PopSci
  • Biodegradeable nanosgtructures with antimicrobial activity
  • Potential bacteriophage applications (Microbe)
  • Letters read on TWiM #5

Send your microbiology questions and comments (email or mp3 file) to twim@microbe.tv, or call them in to 908-312-0760. You can also post articles that you would like us to discuss at microbeworld.org and tag them with twim.

Filed Under: This Week in Microbiology Tagged With: antimicrobial, bacterium, desulfovibrio desulfuricans, genome, mercury, methylating, nanoparticles, sequence

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by Vincent Racaniello

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