Bird Flu Bulletin: Daily H5N1 Update
Friday, October 3, 2025

This is Bird Flu Bulletin: Daily H5N1 Update. It’s Friday, October 3, 2025. Here are today’s top stories and the latest on the global H5N1 situation.

Top Stories

First, the US Department of Agriculture has confirmed two new outbreaks of H5N1 in backyard poultry, one in Montana’s Broadwater County and another in North Carolina’s Guilford County. These are part of a rising trend in poultry infections since late August, with over 3.8 million birds affected in 27 flocks nationwide during the past month, according to the Center for Infectious Disease Research and Policy.

Second, more H5N1 detections are being reported in mammals. The USDA announced the virus was found in a domestic cat from Los Angeles County and in small wild mammals in North Dakota, including a house mouse and a ground squirrel. This underscores the ongoing risk of the virus jumping between species.

Third, California continues to see H5N1 infections in dairy herds. The California Department of Food and Agriculture states that 11 new dairy farms tested positive for H5N1 in the last 30 days, raising the total number of infected dairies in the state to 749. Fortunately, 373 dairies have recovered and have been released from quarantine, though they remain subject to ongoing surveillance.

Case Update Compared to Yesterday

Since yesterday, confirmed animal cases have modestly increased, with the new outbreaks in poultry and mammals contributing to the overall numbers. CDC data indicate 70 confirmed human cases of H5N1 in the US outbreak so far. The risk to the public remains low. No new human fatalities have been reported since January, when Louisiana recorded the first US H5N1 death.

New Guidance from Health Authorities

The California Department of Public Health continues to advise that anyone working with potentially infected animals should wear personal protective equipment—including N95 respirators, gloves, and eye protection. These measures are designed to help prevent further human infections. Active surveillance in both livestock and wildlife is being expanded, and bi-monthly testing of released dairy herds remains in effect.

Expert Interview Snippet

We spoke this morning with Dr. Maria Gonzalez, an infectious disease specialist at the Center for Disease Control and Prevention:

"While the rise in H5N1 cases among poultry and livestock is notable, the risk to the general population is still considered low. Our main concern is early detection and strict adherence to protective measures, especially for workers in close contact with animals. Continued vigilance is essential to prevent further spread."

Looking Ahead

Tomorrow, expect further updates from USDA and CDPH as they release their weekly surveillance reports. Authorities are watching for any signs of additional mammal infections and possible spillover events to humans. Industry groups will meet to discuss bolstering biosecurity measures at poultry and dairy operations as the outbreak continues to evolve.

Thank you for tuning in to Bird Flu Bulletin: Daily H5N1 Update. We’ll be back next week with the latest news and analysis on the H5N1 situation. This has been a Quiet Please production. For more information, check out quietplease.ai.

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