Swine flu–deja vu all over again?

Back in 2007, I wrote about an outbreak of swine influenza from an Ohio county fair. The peer-reviewed paper analyzing the swine influenza isolated from that outbreak has just recently come out. From the abstract:

The swine isolate, A/SW/OH/511445/2007 (OH07), was evaluated in an experimental challenge and transmission study reported here. Our results indicate that the OH07 virus was pathogenic in pigs, was transmissible among pigs, and failed to cross-react with many swine H1 anti-sera. Naturally exposed pigs shed virus as early as 3 days and as long as 7 days after contact with experimentally infected pigs. This suggests there was opportunity for exposure of people handling the pigs at the fair. The molecular analysis of the OH07 isolates demonstrated that the eight gene segments were similar to those of currently circulating triple reassortant swine influenza viruses. However, numerous nucleotide changes leading to amino acid changes were demonstrated in the HA gene and throughout the genome as compared to contemporary swine viruses in the same genetic cluster. It remains unknown if any of the amino acid changes were related to the ability of this virus to infect people. The characteristics of the OH07 virus in our pig experimental model as well as the documented human transmission warrant close monitoring of the spread of this virus in pig and human populations.

Meanwhile, I mentioned yesterday that gene sequences from the new H1N1 virus had been released. Sandy has taken a look at some of these, and compared them with H1N1 and H1N2 viruses from humans and pigs.

Yes, there is a point to the juxtaposition of these two points, and it’s big–after the jump…
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Swine flu: a quick overview–and new New York and Kansas cases

Sorry for the radio silence–I’ve been working on grants and manuscripts like a fiend, and so have tried to limit as many distractions as possible (which, unfortunately, includes blogging). However, the swine flu news is right up my alley, so I do just want to say a few words about it, and point you to some excellent stories already up elsewhere.

First, in case you’ve not been paying attention to the news in the last few days, there have been 8 reported cases of swine influenza infections in humans (6 in California and 2 in Texas, with additional suspected cases) and reports from Mexico suggesting as many as 1000 ill and 68 dead from influenza in the past month or so. Of the Mexican cases, a dozen thus far have been confirmed to be the same strain as the US swine flu strain from California/Texas.

What does all this mean? Much more after the jump.
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