Scientists Discover Why H5N1 Bird Flu Prefers Cows' Udders Over Lungs
Researchers have identified why H5N1 bird flu specifically targets dairy cows' mammary tissue rather than their respiratory systems. The key lies in the distribution of specific cellular receptors that the virus uses to infect cells.
The study reveals that the virus's preferred receptors are highly concentrated in the mammary tissue of cows, which explains why the infection manifests in the udders rather than the typical respiratory route seen in other species. This localized infection pattern in dairy cattle represents an unusual presentation of the typically respiratory avian influenza virus.
Scientists believe this discovery could significantly improve their ability to predict potential bird flu jumps between species and enable earlier detection of unusual infection patterns before they spread widely.