State report on Sonoma County avian flu outbreak focuses on breaches in biosecurity
A newly published state investigation into Sonoma County’s avian flu outbreak cites a number of farm management practices that might have enabled spread of the virus this winter — and raises the possibility animal welfare activists introduced the deadly pathogen during incursions onto two bird farms in October and November.
In effect, the document — an epidemiological review of outbreaks in both Sonoma County and the Central Valley poultry hotbed of Stanislaus/Merced counties — was published Wednesday by the California Department of Food and Agriculture. It provides fodder for both sides of an ongoing battle between environmentalists and representatives of the county’s agricultural industry.
Those critical of the industry, such as the organizers who gathered enough signatures to place a local anti-factory-farming ordinance on the 2024 ballot, find plenty in the report to support their views that prominent Sonoma County poultry farms aren’t doing enough to protect their birds from viruses and other biological hazards.
The Department of Food and Agriculture noted internal biosecurity concerns “at all Sonoma (infected premises).” Biosecurity refers to protective measures to prevent the spread of pathogens, including those meant to halt organic material from being transported in and out of different facilities.
The area’s commercial farmers, meanwhile, highlight a different section of the report — the one titled “Security Breaches.”
California HPAI Epidemiology Investigation: Final Summary Report.pdf
“Animal sanctuary activists were videoed trespassing inside poultry barns and removing ducks on the nights of 10/24/23 and 11/14/23; decreased egg production was noted 8 days after the 2nd illegal entry,” the state agency wrote. “Given the high number of wild birds migrating through the area at that time shedding virus into the environment, as well as the egregious nature of these biosecurity breaches, it is plausible that virus was introduced into the (Sonoma County) premises during those incidents.”
From the start of this winter’s flu season, some in the local agriculture industry have raised the specter of trespassing demonstrators as a vector for Highly Pathogenic Avian Flu. This is the first official inquiry to cite the possibility.
Mike Weber, co-owner of Weber Family Farms and Sunrise Farms, said he was “shocked” to find security breaches mentioned in the report.
“They would never put something in a report like that unless they had serious concerns,” Weber said. “They are not a political organization. The fact they thought it was significant enough to list it right at the top, that scares the hell out of all of us. Because there’s nothing to prevent those individuals doing it again.”
Genetic sequencing from the initial Sonoma County detection this winter indicated likely introduction by wild birds, according to the state report.
After that positive test, “activists posted on Social Media that they also had ‘rescued’ chickens from another poultry premises in the area, which was the second premises where HPAI was detected; no video evidence exists. Whole Genome Sequences of collected samples from both (sites) are similar.”
The activist group Direct Action Everywhere, which relies in part on video evidence collected during unauthorized entry to poultry and livestock operations, rejected the allegation.
“As we’ve shared before, Direct Action Everywhere's biosecurity measures go above and beyond industry standards, and all of our biosecurity protocols have been veterinarian-approved,” the group said in an email, through a press representative. “Investigators quarantine away from poultry, waterfowl, and other birds for a minimum of 7 days prior to entering a facility.”
Activists making incursions shower, sanitize equipment and put on clean clothes before entering a property, the email stated. Before entering barns, they don biosecure shoe covers and full biosecurity suits — “which even Reichardt’s own workers don't do.”
Reichardt Duck Farm was the site of one autumn incursion, and the site of an avian flu outbreak.
The Department of Food and Agriculture’s investigation did reveal several contamination vulnerabilities in the operations of local poultry farms. Some of them related to cross-ownership and cross-management, raising concerns about employees moving between various facilities.
For example, “In the Sonoma cluster, two premises share ranch managers, who were supposed to shower, change clothing, and wait 24 hours prior to entering the next premises; it’s not known if this company policy was always adhered to,” the report states. “In another situation, two employees were discovered to be cohabitating which was against the companies’ policies.”
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