Author name: Vincent Racaniello

I'm Professor of Microbiology and Immunology at Columbia University in New York. I run a research lab where we study poliovirus, rhinovirus, and other RNA viruses. I also love teaching about viruses - check out virology.ws, microbe.tv, or iTunes University for some of my offerings. I want to be Earth's virology professor.

TWiV 431: Niemann-Pick of the weak

The TWiVirions reveal bacteriophage genes that control eukaryotic reproduction, and the biochemical basis for increased Ebolavirus glycoprotein activity during the recent outbreak. You can find TWiV #431 at microbe.tv/twiv, or listen below. Click arrow to play Download TWiV 431 (71 MB .mp3, 118 min) Subscribe (free): iTunes, RSS, email Become a patron of TWiV!

A virus that controls reproduction

The obligate intracellular bacteria Wolbachia (pictured), which infects 40% of arthropods, can manipulate its host to ensure its maintenance in the population. An example is cytoplasmic incompatibility, which occurs when infected males mate with uninfected females, and causes embryonic lethality (mating with an infected female produces viable offspring). Two Wolbachia genes responsible for this phenotype have been …

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How prions make you sick

Transmissible spongiform encephalopathies (TSEs) are rare, but always fatal, neurodegenerative disorders of humans and other mammals. They are characterized by long incubation periods, spongiform changes in the brain associated with loss of neurons, and the absence of host responses. TSEs are caused by infectious proteins called prions. Insight into how prions cause TSEs comes from the observation that …

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TWiV 429: Zika Experimental Science Team

Vincent meets with members of team ZEST at the University of Wisconsin Madison to discuss their macaque model for Zika virus pathogenesis. You can find TWiV #429 at microbe.tv/twiv, or listen/watch right here. [powerpress url=”http://traffic.libsyn.com/twiv/TWiV429.mp3″] Click arrow to play Download TWiV 429 (48 MB .mp3, 78 min) Subscribe (free): iTunes, RSS, email Become a patron of TWiV!

Viral RNA is not infectious virus!

A study of sexual transmission of Zika virus among mice (link to paper) demonstrates beautifully that viral nucleic acid detected by polymerase chain reaction (PCR) is not the same as infectious virus. Male mice were infected with Zika virus and then mated with female mice. Efficient sexual transmission of the virus from males to females was observed. This …

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