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Colorado Ag Commission adopts emergency rule after HPAI outbreak in dairy herds
Summary
The Colorado Ag Commission voted Aug. 21 to adopt an emergency livestock-disease-control rule after state officials reported widespread highly pathogenic avian influenza in dairy herds and spillover to poultry. The rule adds a 30-animal testing requirement before movement and authorizes state quarantine for clinically affected lactating dairy cattle.
The Colorado Ag Commission on Aug. 21 approved an emergency amendment to the state’s livestock disease-control rules in response to an outbreak of highly pathogenic avian influenza (HPAI) affecting dairy and poultry operations.
Dr. Morgan McCarty, the department veterinarian presenting the rule, told the commission that genomic sequencing shows the outbreak involves an HPAI B313 clade and that Colorado has recorded extensive detection across dairies this summer. “We now had one spillover event and began to see this particular clade of virus being transferred between dairy cattle,” she said, describing a shift from previous…
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