Tropism determined by gene product of Herpes Simplex Virus and host cell is a natural barrier in mother-to-infant transmission

All kinds of variant virus did not have pathogenisity in 10,000 (PFU/5uL). When the amount of 100,000 PFU or 500,000 of the virus was infected to mice, the pathogens of frame shift mutants (HSV-2 UL13 G96A fsX5, A142P fsX25, Y162V fsX141) were reduced as compared to without the mutation. On the other hand, the amino acid substitution strain (V165M) was not observed pathogenic decline.