New Research Reveals Asymptomatic Carriers of Avian Flu Virus
New research has revealed that even asymptomatic people carry the avian flu virus, suggesting that infections among dairy workers may be more common than presumed — and underscoring the need for better workplace protection.
Study Finds 7% of Dairy Farm Workers Infected
In a study released by the U.S. Centers for Disease Control on Thursday, eight of 115 dairy farm workers, or 7%, who were exposed to H5N1 bird flu during outbreaks among dairy cows at farms in Michigan and Colorado had antibodies to the virus, showing evidence of prior infection.
Most Workers Did Not Recall Being Sick
While four workers remembered having symptoms, mostly conjunctivitis, the other four workers did not recall being sick. All eight people reported milking cows or cleaning a milking parlor.
CDC Expands Testing Recommendation
In response, the CDC is expanding its recommendation for testing, saying that the test should be offered to any worker who has been exposed to the virus but lacks symptoms. It also encouraged broader use of the antiviral drug Tamiflu for all exposed workers. Finally, it urged better use of protective tools, like face masks.
Scientists Worry About Mutations
Scientists worry that the virus may develop mutations as it spreads, making it more dangerous or skilled at jumping from person to person. So far, all infections were acquired through direct contact with infected animals or milk.
Conclusion
The study highlights the importance of testing and protecting workers who may be exposed to the virus, even if they do not show symptoms. The CDC’s expanded testing recommendation and encouragement of antiviral drug use are crucial steps in limiting the spread of the virus. Additionally, the use of protective tools, such as face masks, is essential in preventing the transmission of the virus.
Frequently Asked Questions
Q: How common is the avian flu virus among dairy workers?
A: According to the study, 7% of dairy farm workers who were exposed to the virus had antibodies to the virus, showing evidence of prior infection.
Q: Can the virus be spread from person to person?
A: No, the virus has not been found to be spread from person to person. All infections have been acquired through direct contact with infected animals or milk.
Q: Is there a risk to consumers of milk and dairy products?
A: No, milk from sick cows is not permitted in the public milk supply, and pasteurization of milk is fully effective at inactivating the virus, so there is no cause for concern for consumers of milk or dairy products.
Q: Is there a vaccine available for the avian flu virus?
A: No, a bird flu vaccine for people and cattle is not yet available.
Q: What is being done to protect dairy workers?
A: The CDC is recommending that workers who have been exposed to the virus but lack symptoms be tested, and that antiviral drug use be expanded. Additionally, the use of protective tools, such as face masks, is being encouraged.
