Table 1.

Determination of virus titers by virus titration on Madin Darby Canine Kidney (MDCK) cells. It has been shown that 20 min irradiation with photosensitizer (PS) leads to the total inactivation of the virus.

Titer of Virus	Allantoic Fluid	Purified Suspension	Stored in Dark with PS (4 µM)	Irradiated for 20 Min without PS	Irradiated for 20 Min with PS (2 µM)	Irradiated for 20 Min with PS (4 µM)
lgTCID50/mL ± 2Ϭ	8.375 ± 0.42	7.125 ± 0.34	7.25 ± 0.30	7.0 ± 0.42	0	0