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USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

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  • USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

    The chart was updated yesterday, but the sample was taken 12/19/06. I couldn't find any news articles, only the LPAI chart.


    The LPAI H5N1 results table has been updated with information on samples currently being tested from an american black duck in Hyde County, North Carolina.

    Hyde County, NC

    American black duck

    Live birds

    Southeastern Cooperative Wildlife Disease Study

    Yes Yes

    Not related to HPAI H5N1;



    Testing underway

    Testing underway
    "We are in this breathing space before it happens. We do not know how long that breathing space is going to be. But, if we are not all organizing ourselves to get ready and to take action to prepare for a pandemic, then we are squandering an opportunity for our human security"- Dr. David Nabarro

  • #2
    Re: USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

    ok, since I'm in Charlotte, NC, this one has really caught my attention.

    I looked at a map of Hyde County, and noticed Swan Quarter is located there. Just a week or tow ago, they closed the public schools there because of a flu (seasonal) outbreak. Probably no correlation, but a little freaky.

    Here is a question off the top of my head, have not thought this out at all. Can the low path H5N1 be passed to humans, and if so, would it cause a mild (seasonal type) version of the flu?

    (Hyde County is on the far right of the map)
    Last edited by yielddude; February 23rd, 2007, 12:42 PM. Reason: add map link


    • #3
      Re: USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

      USDA BF Fact Sheet:

      AVIAN INFLUENZA Low Pathogenic H5N1 vs. Highly Pathogenic H5N1 Latest UPDATE September 28, 2006

      There are two types of avian influenza (AI) that are identified as H5N1. A difference exists in the virus classification; one is low pathogenic (LPAI) and the other is highly pathogenic (HPAI). Pathogenicity refers to the ability of the virus to produce disease.

      HPAI H5N1, often referred to as the "Asian" H5N1, is the type causing worldwide concern. LPAI H5N1, often referred to as the "North American" H5N1, is of less concern. Following is an explanation of the differences between them.

      LPAI H5N1 ("North American" H5N1)

      LPAI, or "low path" AI, commonly occurs in wild birds. In most cases, it causes minor sickness or no noticeable signs of disease. It is rarely fatal in birds. LPAI strains are not a human health concern. This includes LPAI H5N1.

      Evidence of LPAI H5N1 has been found in wild birds in the United States in recent years and is not closely related to the more severe HPAI H5N1 circulating overseas. Examples of historical reports of LPAI H5N1 received by USDA include:

      1975 - LPAI H5N1 was detected in a wild mallard duck and a wild blue goose in Wisconsin as part of routine sampling, not as a result of noticeable illness in the birds

      1981 and 1985 - the University of Minnesota conducted a sampling procedure in which sentinel ducks were monitored in cages placed in the wild for a short period of time and LPAI H5N1 was detected in those ducks in both years.

      1983 - LPAI H5N1 was detected in ring-billed gulls in Pennsylvania.

      1986 - LPAI H5N1 was detected in a wild mallard duck in Ohio as part of routine sampling, not as a result of noticeable illness in the birds.

      2002 - LPAI H5N1 antibodies were detected in turkeys in Michigan but the virus could not be isolated; therefore this detection could not be confirmed.

      2005 - LPAI H5N1 was detected in ducks in Manitoba, Canada.

      2006 - LPAI H5N1 was confirmed in two Michigan mute swans, Maryland resident wild mallard ducks, and Pennsylvania wild mallard ducks sampled as part of USDA's expanded avian influenza surveillance.

      In the past, there was no requirement for reporting or tracking LPAI H5 or H7 detections in wild birds so states and universities tested wild bird samples independently of USDA. Because of this, the above list of previous detections might not be all inclusive of past LPAI H5N1 detections. However, the World Organization for Animal Health (OIE) recently changed its requirement of reporting detections of avian influenza. Effective in 2006, all confirmed LPAI H5 and H7 AI subtypes must be reported to the OIE because of their potential to mutate into highly pathogenic strains. Therefore, USDA now tracks these detections in wild birds, backyard flocks, commercial flocks and live bird markets.

      HPAI H5N1 ("Asian" H5N1)

      HPAI, or "high path" AI, spreads rapidly and is often fatal to chickens and turkeys. This includes HPAI H5N1. Millions of birds have died in countries where HPAI H5N1 has been detected. This virus has also infected people, most of whom have had direct contact with infected birds.

      HPAI H5N1 has not been detected in the United States. However, other strains of HPAI have been detected and eradicated three times in the United States: in 1924, 1983 and 2004. No significant human illness resulted from these outbreaks.

      The 1924 HPAI H7 outbreak was contained and eradicated in East Coast live bird markets.

      The 1983-84 HPAI H5N2 outbreak resulted in humanely euthanizing approximately 17 million chickens, turkeys and guinea fowl in Pennsylvania and Virginia to contain and eradicate the disease.

      In 2004, USDA confirmed an HPAI H5N2 outbreak in chickens in Texas. The disease was quickly eradicated thanks to close coordination and cooperation between USDA and State, local, and industry leaders.


      • #4
        Re: USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

        Thanks Hawkeye!


        • #5
          H5 and N1 in North Carolina Birds

          The updated chart of US avian influenza detections indicates that live American Black Ducks have been infected with H5 and N1. It is expected to be the same Low Path H5N1 variety found elsewhere in the states, but further testing is underway.

          To date, none of the genetic sequences related to any of these viruses have been released to the public even though the earliest detections go back to last summer. There is no recorded human infections of this virus strain, therefore its clinical manifestations are unknown.


          • #6
            Re: USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

            Sure. Anytime. It only 1/2 answers your question. I don't know if it's possible for LPAI to mingle with common human flus.


            • #7
              Re: USDA - LP H5N1 suspected in duck - Hyde County, North Carolina

              Chart Updated. It is not H5N1. It is H4N1.
              Is that a new one?