Cellular invasion can be duplicated in vitro with polarized epithelial cell monolayers, and parasites ' activated ' to acquire infectivity.
2
I do n't know that bile has ever been looked at for scrapie infectivity.
3
L., et al. "Emerging Pattern of Rabies Deaths and Increased Viral Infectivity."
4
No infectivity was shown in these tests of fetal calf serum.
5
The CNS tissues of sheep clinically affected with scrapie had been demonstrated to have higher titres of infectivity than those of asymptomatic infected sheep.
6
There is an urgent need to determine BSE infectivity titres in a large variety of bovine tissues.
7
This was significant in that infectivity of spleen tissue with BSE agent could be shown once the species barrier had been passed.