Were the highly pathogenic H5N1 viruses transferred within and between countries by persons, poultry, or fomites?
Notwithstanding potential caveats, in particular, incomplete and uneven sampling of eukaryotic taxa, these highly unexpected findings reveal horizontal virus transfer (HVT) between diverse hosts as the central aspect of RNA virus evolution.
Detection of virus transfer to TZM.bl cells was by X-gal staining as described [15], [40].
Understanding the mechanism(s) involved in contact dependent virus transfer will further enhance our knowledge towards developing additional antiviral strategies to prevent HIV-1 transmission.
To understand whether antigen uptake mechanism is involved in virus transfer from infected T cell to DC, we examined the interrelationship between antigen uptake and DC infection.
The 1918 influenza epidemic, the 2003 SARS incident and the ongoing HIV/AIDS pandemic constitute clear examples of virus transfer from birds [1], bats [2] and chimpanzees [3].
Results presented above indicate that transfer of virus from T cells to DC is independent of viral envelope as well as cell surface receptors in DC, suggesting that receptor independent mechanisms may be involved in virus transfer.
The cells were then washed and mixed with RFP-expressing PM-1 indicator cells and analyzed for virus transfer from the A3-CCR5 populatoon thethe RFP-positive indicator cell line PM-1.
Results presented here indicate that DC acquire virus from infected T cells independent of cellular and viral receptors that are involved in typical cell-free infections but dependent of cell-to-cell contact, suggesting that cell-to-cell communication and/or cellular networks are involved in virus transfer.
However, concerns regarding cross-species virus transfer and subsequent compatibility for therapeutic applications [9], [10], [11], [12] have led to hESCs being typically maintained on human fibroblast feeders or on naturally derived matrices supplemented with media conditioned by fibroblasts [13], [14], [15].
