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Avian Influenza Testing In Birds in California. Ben Sun, DVM, MPVM 916-552-9740 [email protected] California Department of Health Services. Ecology and Epidemiology. Key: Exposure to Domestic Waterfowl. LPAIV. Exposure Adaptation. Asian H5N1 HPAIV. Re-adaptation. HPAIV (H5/H7). HA

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Avian influenza testing in birds in california l.jpg

Avian Influenza Testing In Birds in California

Ben Sun, DVM, MPVM

916-552-9740

[email protected]

California Department of Health Services


Ecology and epidemiology l.jpg
Ecology and Epidemiology

Key: Exposure to Domestic Waterfowl

LPAIV

Exposure

Adaptation

Asian H5N1 HPAIV

Re-adaptation

HPAIV

(H5/H7)

HA

Mutation

LPAIV

(H1-16)


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California Avian Sub-Populations

Commercial Broilers

Commercial Turkeys

Commercial Layers

Custom Slaughter

Commercial Game Birds

Socialization

Feed Stores

SPF/Research

Proximity

Pet Stores

Commercial Ducks

Shows

Auctions

Wild Birds

Backyard/Hobby

Swap Meets

Exotic Birds

Game Fowl

Pet Birds


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Laboratories Testing for AI in CA

  • 1. California Animal Health and Food Safety Lab (CAHFS) – Primary veterinary lab system statewide under CDFA

  • Private Poultry Industry – Screening tests in-house using AGID, forward positive samples to CAHFS for characterization

  • San Diego County Agriculture Dept. – Limited testing of all avian species in County Vet lab

  • UC Davis Researcher – Dr. Carol Cardona who is also testing some wild birds for the UCD Wildlife Health Center project


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CAHFS Laboratory Locationshttp://cahfs.ucdavis.edu/



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AI Testing in California (January-June, 2005)

Source: D. Rolfe, CAHFS

1 lab accession may represent 1-100 birds

Approx 25,000 birds tested


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Wild Bird Issues

  • Very few wild birds being tested

  • Future plans nationwide for a coordinated wild bird surveillance system (USDA)

  • Further info on HPAI H5N1 in wild birds and recommendations for handling wild birds at USGS website

  • http://www.nwhc.usgs.gov/research/WHB/WHB_05_03.html

  • http://www.nwhc.usgs.gov/research/avian_influenza/HPAI082005.pdf


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Poultry Issues

  • Coordinating notification and response with CDFA

  • Occupational health concerns for poultry workers

  • Contact your local CDFA district office

  • http://www.cdc.gov/flu/avian/professional/protect-guid.htm

  • http://www.osha.gov/dsg/guidance/avian-flu.html

  • http://www.osha.gov/dts/shib/shib121304.html


Cdfa district offices http www cdfa ca gov ahfss ah offices htm l.jpg
CDFA District Officeshttp://www.cdfa.ca.gov/ahfss/ah/offices.htm


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Conclusions

  • Wild birds are genetic reservoirs of all AI virus genes which are genetically very diverse

  • LPAIV maintained in wildbirds, and must be adapted to pass to domestic poultry

  • HPAIV arise in poultry and historically have not gone back to wild birds

  • Asian H5N1 HPAIV has readapted to some wild bird species creating a new mechanism of spread

  • Asian poultry production is very different than USA and poses different risks for HPAI introduction and maintenance

  • Comprehensive surveillance and early detection and response are key to minimizing the impact of HPAI in animals and humans

  • 7. Planning, communication, and coordination must continue to increase our preparedness for HPAI and possible pandemic


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