Herpes Simplex Virus Type 2 UL24 Gene Is a Virulence Determinant in Murine and Guinea Pig Disease Models
Journal of Virology
A herpes simplex virus type 2 (HSV-2) UL24 β-glucuronidase (UL24-βgluc) insertion mutant was derived from HSV-2 strain 186 via standard marker transfer techniques. Cell monolayers infected with UL24-βgluc yielded cytopathic effect with syncytium formation. UL24-βgluc replicated to wild-type viral titers in three different cell lines. UL24-βgluc was not virulent after intravaginal inoculation of BALB/c mice in that all inoculated animals survived doses up to 400 times the 50% lethal dose (LD50) of the parental virus. Furthermore, few UL24-βgluc-inoculated mice developed any vaginal lesions. Intravaginal inoculation of guinea pigs with UL24-βgluc at a dose equivalent to the LD50 of parental virus (≈5 × 103 PFU) was not lethal (10/10 animals survived). Although genital lesions developed in some UL24-βgluc-inoculated guinea pigs, both the overall number of lesions and the severity of disease were far less than that observed for animals infected with parental strain 186.
Robert J. Visalli, Susan Blakeney, Jacek Kowalski, Donna Tummolo, Joanne DeStefano, David Cooper, Min Guo, Seema Gangolli, Deborah Long, Timothy Zamb, and Robert J. Natuk (2005).
Herpes Simplex Virus Type 2 UL24 Gene Is a Virulence Determinant in Murine and Guinea Pig Disease Models. Journal of Virology.79 (16), 10498-10506.