Saturday, November 12, 2005

No word on neuraminidase subtype for CDN H5 influenzas from wild birds

This article from the Vancouver Sun is mainly about the pathology of H5N1 and SARS in humans, but there is one line indicating that the results from tests for the neuraminidase subtype for the H5 positive birds in Canada (previous comments here, here, and here) are yet to come:

Meanwhile, the Canadian Food Inspection Agency said Thursday it is still not known what type of bird flu strain has infected wild migratory ducks in Quebec and Manitoba. Preliminary results found the birds were infected with the H5 subtype. Officials are still awaiting tests to determine the "N" type of the virus.

I don't agree with the abundant conspiracy theories (e.g., on this curevents thread) about why the results haven't been yet released. I think they really don't have them yet.

I've heard rumours that many of the sampled birds had multiple infections with several strains of influenza, as might be expected. I am not a virologist and so my understanding of the technical aspects of this is limited, but I understand the testing is done by identifying the "H" subtype and the "N" subtype independently, so perhaps it is taking a while to figure out which "H" goes with which "N".

This is just a supposition however. I do think the rapidity and openness with which the Canadian Food Inspection Agency (CFIA) released information on finding H5 is really good evidence that there is no conspiracy. If the CFIA really wanted to hide something, why would they publicly announce the discovery of the H5?

Damien

0 Comments:

Post a Comment

<< Home