7GUTEKUNST D E. Latent pseudorabies virus infection in swine de- tected by RNA -DNA hybridization [J]. Am J Vet Res, 1979,40 ( 11 ) :1568 - 1572.
8LINNET. Diagnosis of Pseudorabies virus infection in pigs with spe- cific DNA probes[J]. Res Vet Sci, 1987,43(2) :150 -156.
9MAES R K, SUSSMAN M D, VILNIS A, et al. Recent develop- ments in latency and recombination of Aujeszky' s disease ( Pseudor- abies) virus [ J ]. Vet Mirobiol, 1997,55 ( 1/2/3/4 ) : 13 - 27.
10CARD J P, RINAMAN L, SCHWABER J S, et al. Neumtropic properties of Pseudorabies virus: uptake and transneumnal passage in the rat central nervous system[J]. J Neurosi, 1990, 10(6) : 1974 - 1994.