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2003 DEC 3 - (NewsRx.com & NewsRx.net) -- An attenuated FIV vaccine provided protection from an intraclade challenge administered systemically or mucosally.
"Feline immunodeficiency virus (FM) infection of domestic cats represents a valuable system through which to investigate criteria for antilentiviral vaccines in a natural host species. Here, we examined whether vaccination with a strain of FIV attenuated as a result of prolonged growth in vitro could protect against a fully virulent, highly heterologous intraclade challenge," investigators in Italy report.
"The results indicated that the vaccine virus produced a low-grade infection with no detectable pathological effects and afforded a long-lasting sterilizing immunity if the challenge was delivered intraperitoneally as cell-free virus but not against a cell-associated intravaginal challenge," said Mauro Pistello and colleagues at the University of Pisa. "In the latter case, however, the replication and pathological consequences of the challenge virus were markedly suppressed."
The researchers concluded, "Together with similar results obtained in rhesus monkey models, these findings ...