We've try to use the substances like PE (polyethylene) and DEAE Dextran to prove the existence virus in monolayered cell, but the result is too confusing. Please tell me if you have the explanation about this.
in order to help you please tell us what kind of virus to you try to grow, what kind of medium? how long is the incubation? are you using regular Vero cells or Vero E6?
PRRS, an arterivirus (RNA viruses) and we use Eagle MEM as medium growth with 10% of FBS. the incubation that we have been studied from many journals was approximately about 2-3 days. so we use it. I thought that we use the regular one.
I understand that you are trying to trensfect Vero cells with some kind of plasmid using the DEAE Dextran method?
Vero Cells are not very easy to transfect. If you must use them try to use reagent of the Lipofectamin family. In any case I would try to optimize transfection first using a plasmid that expresses a reporter such as GFP before you start with your virus expresssion.