Protecting Dairy Workers from Infection: Insights from a Study on Highly Pathogenic Avian Influenza in Milk Production

Dairy farm workers are at risk of infection from the highly pathogenic avian influenza (H5N1) virus, according to a study by the Vaccine Research Center at the University of Pittsburgh. The study, led by Valerie Le Sage, collected convincing evidence that the risk comes not only from direct contact with unpasteurized milk produced by sick cows but also from contaminated surfaces during the milking process.

In response to the HPAI-H5N1 virus epidemic in dairy cows in multiple American states, researchers conducted laboratory experiments to test the persistence of avian influenza A(H5N1) and human influenza A(H1N1) viruses on milking equipment. The results showed that both viruses remain infectious on milking equipment materials for several hours, highlighting the risk of transmission of the H5N1 virus to humans through contaminated surfaces during milking.

The study also raises concerns about the potential for the H5N1 virus to adapt to humans and evolve within their bodies, potentially becoming transmissible from person to person. To reduce the spread of the H5N1 virus from dairy cows to humans, researchers recommend implementing personal protective equipment such as masks, visors, and other eye protection among workers during milking. Additionally, sanitizing rubber liners used in the milking process after milking each cow could help reduce the spread of the virus among animals and curb the current epidemic.

It is important for dairy farmers and workers to take precautions to prevent further spread of this dangerous virus. Implementing strict biosecurity measures such as proper cleaning and disinfection protocols can help minimize exposure and reduce transmission risks associated with HPAI-H5N1 outbreaks on dairy farms.