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The Lazarus virus

There is an excellent question in the comments to “Are all virus particles infectious?“: if the particle-to-PFU ratio for a virus stock is 10,000:1, and I infect 1,000,000 cells with 10,000 particles, how many plaques would I expect to observe? Answering this question provides insight into the p... Read More

TWiV 162 Letters

Sarah writes:

Hello to the TWiV crew,

Here are a couple of picks I thought would be good for provoking thought and generating discussion...

While working on a project, I came across some papers attempting to define what "critical thinking" means. I app... Read More

A new target for hepatitis C virus

When infection with hepatitis C virus goes from acute to chronic, severe liver disease may occur which requires organ transplantation. Nearly 200 million people are chronically infected with HCV, necessitating approaches to preventing and treating infections. No HCV vaccine is available, and cur... Read More

Virophage, the virus eater

A second virophage has been identified. The name does not signify a virus that infects another virus – it means virus eater.
Read More

TWiV 155 Letters

Kim writes:

To the TWiVerati Intelligencia,

Each week you begin your show with the tagline, "This Week in Virology: The podcast about viruses, the kind that make you sick."

I recognize that viruses have been responsible for some of the biggest epidemic... Read More

The Human Lake

Science writer Carl Zimmer writes a masterful blog piece tracing the history of the study of ecosystems, from lakes to the human microbiome. Just one interesting fact: In their lifetimes, individual humans will produce about five elephants worth of microbes. Read More

Frank Fenner, MD, 1914-2010

Australian virologist Frank Fenner, MD was born in Ballarat, Victoria in 1914. He earned a Doctor of Medicine in 1942 at the University of Adelaide, and from 1940 – 1946 he worked on the malaria parasite in Egypt and Papua New Guinea as an officer in the Australian Army Medical Corps. He subsequ... Read More

Norton Zinder, 1928-2012

Norton Zinder made two important discoveries in the field of virology. While a Ph.D. student with Joshua Lederberg at the University of Wisconsin-Madison he found that viruses of bacteria (bacteriophages) could move genes from one host to another, a process called transduction. Later in his own ... Read More

XMRV and CFS – It’s not the end

Yesterday the Chicago Tribune published my reaction to the four papers on the retrovirus XMRV published this week in the journal Retrovirology. I was quoted as saying ”These four papers are probably the beginning of the end of XMRV and CFS”. I wish to retract this statement and explain my reason... Read More

Genome Wide Manipulation of the Bacterial Chromosome in Vivo

On the Small Things Considered blog, Michael Schmidt, Professor and Vice Chairman of Microbiology and Immunology at the Medical University of South Carolina, reviews a recent paper entitled "Precise Manipulation of Chromosomes in Vivo Enables Genome-Wide Codon Replacement" by Church and colleagu... Read More

Microbial Movers - A Small Things Considered Post

Elio Schaechter of Small Things Considered has authored an interesting post today about the motility of bacteria, specifically Paenibacillus, although he does highlight several other strains that swarm, glide or twitch.

"Microbes get around. They can be carried by the wind, by insects, or by ... Read More

Building the perfect bug

This past February I was interviewed by the Australian Broadcasting Company on the topic of the Fouchier and Kawaoka experiments on avian influenza virus H5N1. The video, Building the Perfect Bug, has been released by Journeyman Pictures and includes interviews with S.T. Lai, Laurie Garrett, Mic... Read More

Small fragments of viral nucleic acid cross borders in monkey meat

The finding of viral nucleic acid sequences in illegally imported wildlife products has attracted the attention of the New York Times, which published an article entitled From the jungle to J.F.K., viruses cross borders in monkey meat. Read More

The Rise of Genomic Superspreaders

One hundred million years ago the earth’s climate was much warmer than today and vast inland seas stretched across entire continents. The land was dominated by charismatic megafauna that would one day serve as inspiration for Sir Arthur Conan Doyle’s novel The Lost World. This period is commonly... Read More

The dwindling American science majors

According to the New York Times (Why Science Majors Change Their Minds), the decline in the number of science majors in the United States has come about in part because the subject matter is too difficult. If this explanation is true, then we have not properly prepared these students in grades K... Read More

TWiV 139 Letters

Norma writes:

Some time ago I emailed you about transcribing an episode of TWiV and have finally finished episode 60. Let me join the chorus of appreciative listeners in praise for your podcast! I've learned a lot from it I was inspired by your generosity... Read More

Health Alert Map Mash-up with Infectious Disease

This is a really cool Google Maps mash up that geo-locates breaking health news on a map. You can sort by official government announcements, news wires, infectious disease types, zoom to countries, local areas and more. Great for looking at Swine Flu reporting as it happens. Read More

Happy as a clam? Maybe not.

The expression “Happy as a Clam” comes with new meaning as hepatitis A virus has been detected in clams, mussels, and oysters in markets for human consumption. As bivalve shellfish are excellent bio-accumulators of contaminants and chemicals, it is no surprise that they also harbor waterborne vi... Read More

El Podcast del Microbio Nº 174 y 175. La Historia de Alice Catherine Evans. /The Story of Alice Catherine Evans)

El podcast del Microbio Nº174 and 175 are dedicated to Alice Catherine Evans, one of the first women microbiologists. Los ... Read More

TWiV 98 Letters

James writes:

I'm just writing to clarify my question about the production of the flu vaccine if one of the other seasonal strains was removed as there seemed to be a bit of confusion about the point of it.

As I understand it one of the biggest holdups in seas... Read More

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