
SAN FRANCISCO-When the HIV virus is acquired through breast-feeding or sexual activity, its first contact is with the epithelial cells of the gastrointestinal, anorectal, or genitourinary tracts. It then appears to use a raft mechanism and transcytosis to pass through the epithelial cells to enter and infect the submucosal target cells, French researchers said at the 40th Annual Meeting of the American Society for Cell Biology.