Re: Pandemic Flu - Thread II
British Columbia had an outbreak of avian flu in 2004. It was not
H5N1. It is useful to look at what happened:
Human Illness from Avian Influenza, British Columbia | CDC EID
One barn that contained over 9000 chickens, came down with low path H7N3. In an adjacent barn that contained 9,030 chickens, testing confirmed highly pathogenic avian influenza (HPAI) H7N3 in this second flock.
Despite culling of both flocks, and active avian flu surveillance of farms within 5 km, it spread. All poultry in the Fraser Valley south of the Fraser River (19 million birds) were culled .
Workers involved in the culling were required to get a seasonal flu shot and take prophylactic Tamiflu. They wore biosafety suits, and footwear, gloves, goggles, N95/North 7700 masks. This was also recommended for exposed farm workers and the farm families.
Originally Posted by www.cdc.gov/ncidod/EID/vol10no12/04-0961.htm Human Illness from Avian Influenza, British Columbia | CDC EID]
...H7N3 infection was confirmed in two men (40 and 45 years of age) exposed on different farms...One was not wearing eye protection, and the other was wearing glasses that were bypassed by a feather. Neither was taking oseltamivir prophylaxis. Neither was vaccinated against human influenza virus...
There is mention that the virus mutated from high path to low path. Usually, the concern is that virus will mutate from low to high path. Flocks are culled because of the risk to humans. My question about what happened there is, how did these factory farmed animals become infected? What was the source?
As health care workers, masks are not going to be enough if this story is any indication of how influenza came be spread. Protective eyewear is needed. Being hit in the eyes with sputum from the uncontrolled coughing of patients is a concern.
Wild birds continue to be monitored. Low path H5N1 is not dangerous to them, but it can be to chickens because of the real possibility of mutation, and thus to humans.
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