[Pply] VL: PRO/AH> Influenza (40): bird handlers, seroprevalence

[Isomursu Marja]

Terve,
Rengastajia ehkä kiinnostaa alla oleva viesti, jossa on linkki (tai ainakin www-osoite, jos linkki ei toimi) uuteen artikkeliin. Aiheena amerikkalaisten lintuharrastajien altistuminen lintuinfluenssaviruksille.
Lopputulos on, että kovin harvinaista on tartunnan saaminen. Lisäksi totesivat, että rengastajat ottavat muuta USA:n väestöä laiskemmin kausi-influenssarokotuksia! Miten lie Suomessa...

t. Marja I.

-----Alkuperäinen viesti-----
Lähettäjä: owner-promed-ahead at promed.isid.harvard.edu [mailto:owner-promed-ahead at promed.isid.harvard.edu] Puolesta ProMED-mail
Lähetetty: 25. toukokuuta 2012 23:54
Vastaanottaja: promed-ahead at promedmail.org
Aihe: PRO/AH> Influenza (40): bird handlers, seroprevalence

INFECTION (40): BIRD HANDLERS, SEROPREVALENCE
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Date: Thu 24 May 2012
Source: Journal of Clinical Virology. in press [edited] <http://www.sciencedirect.com/science/article/pii/S1386653212001734>


A national study of individuals who handle migratory birds for evidence of avian and swine-origin influenza virus infections
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Authors: Shira C. Shafir, Trevon Fuller, Thomas B. Smith, and Anne W.
Rimoin 

Abstract

Background:
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Persons with occupational or recreational exposure to migratory birds may be at risk for infection with highly pathogenic avian influenza and other avian influenza viruses since wild birds are the natural reservoir of influenza A [viruses]. Additionally, bird handlers may host avian and swine-origin influenza (pH1N1) virus co-infections, which generate reassortant viruses with high pathogenicity in mammals.

Objectives:
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We assessed the prevalence of avian and swine influenza viruses in US-based bird handlers and estimated their exposure to different orders of wild birds including waterfowl (Anseriformes), songbirds (Passeriformes), and shorebirds (Charadriiformes).

Study design:
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Cross-sectional serologic survey accompanied by a questionnaire to estimate behavioral risk factors. This is the 1st survey of US-based bird handlers who also work at international sites.

Results:
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401 participants were recruited and tested over the course of 3 years.
One participant with occupational exposure to migratory birds had evidence of past infections with a H5N2 virus antigenically related to A/Nopi/MN/07/462960-02, which is the 1st case of this influenza subtype in a human host associated with exposure to wild rather than domestic birds. We detected no avian and swine-origin influenza virus co-infections. The exposure of bird handlers to songbirds was 4 times greater than to shorebirds or waterfowl.

Conclusions:
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Though rare, the transmission of avian influenza viruses from migratory birds to US-based bird handlers has potentially significant public health and economic consequences. Only one of 401 persons over a period of 3 years show evidence of exposure to infection. People handling migratory birds do not appear to be at high risk of contracting influenza virus infection by this route.

--
Communicated by:
Ken Cokanasiga
<kenc at spc.int>

[The results of this study indicate that the transmission of influenza A viruses from migratory birds to susceptible people handling such birds occurs only rarely. One of 401 persons studied showed of evidence of infection by influenza virus, a H5N2 type influenza virus.
This route of infection does not appear to be a significant factor in the evolution of novel human pathogens. Studies of other migrant species in other regions of the world, of course, might yield different results. - Mod.CP]

[see also:
Influenza (39): H1N1pdm vaccine, cross-reactive responses
20120525.1143744
Influenza (38): CDC update 20120518.1137576 Influenza (37): WHO update 20120512.1131168 Influenza (36): Norway, H3N2v seroprevalence 20120511.1130181 Influenza (35): WHO update 20120427.1116391 Influenza (34): Taiwan, pre- & post-pandemic mortality
20120426.1115182
Influenza (33): USA (WA), real-time surveillance 20120422.1110181 Influenza (32): vaccine efficacy 20120417.1104483 Influenza (31): USA (WA, NV, CO) surveillance 20120416.1103337 Influenza (30): WHO update 20120413.1100438 Influenza (20): host susceptibility gene identified 20120328.1083177 Influenza (10): New Zealand (AU) airport ex Japan 20120213.1040743
Influenza: USA (OH) institutional children with neuro conditions 20120105.1001023] .................................................cp/ejp/mpp
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