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Dual H5N1 Bird Flu Infections in North America
Commentary
September 3, 2006
It is possible that these birds were not infected with an H5N1 strain, but instead with two separate avian influenza viruses, one containing H5 and the other containing N1. The confirmatory testing underway at USDA's National Veterinary Services Laboratories will clarify whether one or more strains of the virus are present, the specific subtype, as well as confirm the pathogenicity.
The above comments raise the possibility of dual or multiple infections in the H5N1 positive mallards, which is a distinct possibility. However, the cloned H5N1 from a mute swan in Michigan was H5N1 and sequence data from mallards in Maryland and Pennsylvania indicate that the H5 positive samples in those states are similar to the H5N1 detected in Michigan. Thus, although the isolates from Maryland and Pennsylvania may be mixtures, both samples likely include H5N1.
The finding of the H5N1 serotypes in all three states is unexpected based on results from southern Canada in 2005. The Canadian tests found H5 in 218 birds, and the vast majority, 187, was in mallards. However, most of these isolates were not H5N1. Most of the H5 positives were in British Columbia, where H5N2 and H5N9 serotypes were identified. The second highest total was in Quebec, where H5N3 was found. The initial reports indicated H5N1 was only detected in Manitoba. Only three birds in Ontario were H5 positives, even though three of the collection sites were near the northern shores of Lake Erie.
Originally posted by justgeneric
It was confirmed that some ducks in Chilliwack carried the H5 strain. But I am a bit confused as to what killed them. Was it a mould, was it a virus was it a bacteria was it a chemical agent??
Now did all 3400 of the now deceased ducks pass through Alberta or BC?
How can you be certain that they ALL went through Alberta?
Reuters. 14 Dec 2006
Most mallards that winter in Idaho originate from Alberta, Canada, with a smaller percentage from the Northwest Territories, said Tom Keegan, regional wildlife manager with Idaho Fish and Game.
I think it's very unlikely that the dead ducks in Idaho picked up anything in Alberta and even more unlikely that all 3400 birds now dead went through only Alberta on their way.
...IMO it's more likely that the dead Mallards in Idaho migrated through BC.
Back in 2005 there were death of foul due to avian flu(s) both H5 and N1 seperately were suspect. Though they did not suspect that the birds carried nor died from the deadly combination H5N1.
From Recombinomics.com
Dual H5N1 Bird Flu Infections in North America
Commentary
September 3, 2006
It is possible that these birds were not infected with an H5N1 strain, but instead with two separate avian influenza viruses, one containing H5 and the other containing N1. The confirmatory testing underway at USDA's National Veterinary Services Laboratories will clarify whether one or more strains of the virus are present, the specific subtype, as well as confirm the pathogenicity.
The above comments raise the possibility of dual or multiple infections in the H5N1 positive mallards, which is a distinct possibility. However, the cloned H5N1 from a mute swan in Michigan was H5N1 and sequence data from mallards in Maryland and Pennsylvania indicate that the H5 positive samples in those states are similar to the H5N1 detected in Michigan. Thus, although the isolates from Maryland and Pennsylvania may be mixtures, both samples likely include H5N1.
The finding of the H5N1 serotypes in all three states is unexpected based on results from southern Canada in 2005. The Canadian tests found H5 in 218 birds, and the vast majority, 187, was in mallards. However, most of these isolates were not H5N1. Most of the H5 positives were in British Columbia, where H5N2 and H5N9 serotypes were identified. The second highest total was in Quebec, where H5N3 was found. The initial reports indicated H5N1 was only detected in Manitoba. Only three birds in Ontario were H5 positives, even though three of the collection sites were near the northern shores of Lake Erie.
Alberta doesn't even factor in.