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Research reveals that although H5N1 can infect mice and ferrets through contact with infected milk, it does not easily transmit through the air. This indicates a potential risk to humans handling raw milk, but less concern for wider airborne spread., while capable of making mice and ferrets sick from infected cow’s milk, shows limited ability to spread through the air among ferrets.
Colorized transmission electron micrograph of avian influenza A H5N1 virus particles , grown in Madin-Darby Canine Kidney epithelial cells. Microscopy by CDC; repositioned and recolored by NIAID. Credit: CDC and NIAID Yoshihiro Kawaoka, UW–Madison professor of pathobiological sciences. Credit: University of Wisconsin–Madison
“That suggests that the exposed ferret was infected, indicating some level of airborne transmissibility but not a substantial level,” Kawaoka says.Separately, the team mixed the bovine H5N1 virus with receptors — molecules the virus binds to in order to enter cells — that are typically recognized by avian or human influenza viruses. They found that bovine H5N1 bound to both types of molecules, representing one more line of evidence of its adaptability to human hosts.
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