Breaking: California Reports Two Human Cases of H5 Bird Flu Linked to Dairy Cows
Sacramento, CA – October 3, 2024 – California health officials are investigating two confirmed human cases of H5 bird flu, according to the Centers for Disease Control and Prevention (CDC). The infections were detected in individuals with occupational exposure to infected dairy cattle within the state.
The California Department of Public Health is leading the ongoing inquiry. while the identification of H5 in people with exposure to infected animals was anticipated, the CDC maintains that the risk to the general public remains low. Authorities have found no connection between the two cases, pointing towards separate instances of the virus jumping from animals to humans.
California’s Response and Monitoring Efforts
The CDC is working closely with California and other state health departments to support efforts to limit the spread of H5N1 from infected animals to people. California’s proactive monitoring highlights the steps being taken to minimize risks to farm workers who may come into contact with infected animals. The CDC will conduct further characterization of the viruses,including sequencing and attempting to isolate and grow the viruses for research.
These are the first confirmed human cases of H5 in California. H5N1 outbreaks among dairy herds were first reported in August 2024. This year marks the first detection of H5N1 bird flu in cows within the United States.
National Impact: Bird Flu Cases Across the U.S.
Since 2022, the H5N1 virus has been widespread in wild birds, leading to ongoing outbreaks among poultry. Sporadic infections in people who work closely with infected animals, such as dairy cow and poultry workers, have occurred. With these new cases, the U.S. has seen a total of 17 human cases of H5 as 2022, with 16 occurring in 2024 alone.
These cases have been reported across multiple states:
- Texas: 1
- Michigan: 2
- Colorado: 10
- Missouri: 1
- California: 2
Six of the 16 cases reported in 2024 have been linked to exposure to sick or infected dairy cows, while nine cases had exposure to infected poultry.The source of infection for the case in Missouri remains under investigation through serologic testing of contacts.
Protecting Yourself: CDC Recommendations
The CDC offers specific guidelines to protect individuals from H5N1 bird flu in dairy cattle. These include:
- Avoiding contact with wild birds and sick or dead animals.
- Not consuming unpasteurized (raw) milk or raw cheese.
- Wearing personal protective equipment (PPE) when working with dairy cows or other animals that could be infected.
The CDC recently updated its personal protective equipment guidance to prevent H5N1 bird flu infection. Pro Tip: Always ensure your PPE is properly fitted and worn correctly to maximize protection.
Recognizing Symptoms and Seeking Medical Care
The CDC advises that anyone experiencing symptoms after close contact with infected animals should contact their local health department and a healthcare provider for testing.
Symptoms of H5 include:
- Eye redness (conjunctivitis)
- Mild flu-like upper respiratory symptoms
- Fever
- Cough
- Sore throat
- Difficulty breathing
- Runny or stuffy nose
- Muscle aches
Bird Flu: Key Facts at a Glance
| Fact | Details |
|---|---|
| Cases Reported | 17 human cases since 2022 (16 in 2024) |
| States Affected (2024) | Texas, Michigan, Colorado, Missouri, California |
| Transmission | Primarily from infected animals (dairy cows, poultry) to humans |
| Risk Level | Low for the general public |
| Prevention | avoid contact with infected animals, use PPE, avoid raw milk |
Understanding bird Flu: An Evergreen viewpoint
Bird flu viruses, like H5N1, are constantly evolving, making ongoing surveillance and research crucial. While the current risk to the general public remains low, it’s vital to understand how these viruses spread and what measures can be taken to prevent infection. Global health organizations,including the World health Organization (WHO),continuously monitor influenza viruses in animals and humans to assess potential pandemic risks. Keeping informed about the latest developments in avian influenza can help you make informed decisions to protect your health. Do you know the difference between avian influenza and seasonal influenza? Did You Know? The first known outbreak of what is now known as avian influenza occurred in Italy more than a century ago.
Furthermore, advancements in vaccine development and antiviral treatments are essential for responding to potential outbreaks. Public health infrastructure also plays a vital role in detecting and containing the spread of the virus. Supporting these systems and promoting responsible animal handling practices are key steps in mitigating the long-term risks associated with avian influenza.
Frequently Asked Questions About Bird Flu
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What is the current risk level of bird flu to the general public?
The CDC’s risk assessment for the general public remains low,even with the recent cases of H5 bird flu.
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How are people contracting bird flu?
the confirmed human cases of H5 bird flu are linked to occupational exposure to infected dairy cows.
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What are the symptoms of H5 bird flu?
Symptoms include eye redness (conjunctivitis), mild flu-like upper respiratory symptoms, fever, cough, sore throat, difficulty breathing, runny or stuffy nose, and muscle aches.
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What precautions should farm workers take to avoid bird flu?
farm workers should wear personal protective equipment (PPE) when in contact with dairy cows, raw milk, other animals, or surfaces that might be contaminated. Avoid contact with wild birds and sick or dead animals.
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Where have human cases of H5 bird flu been reported in 2024 besides California?
In 2024, human cases of H5 bird flu have been reported in Texas, Michigan, Colorado, and Missouri, in addition to the two cases in California.
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Is it safe to consume pasteurized milk?
Yes, the CDC recommends avoiding the consumption of unpasteurized (raw) milk or raw cheese, but pasteurized milk is considered safe.
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What should I do if I experience flu-like symptoms after contact with infected animals?
Contact your local health department and a health care provider for testing if you develop symptoms after close contact with infected animals.
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