| nucleotide sequence variations of the major structural proteins (vp15, vp19, vp26 and vp28) of white spot syndrome virus (wssv), a pathogen of cultured litopenaeus vannamei in mexico. | white spot syndrome virus (wssv) was first reported in farmed litopenaeus vannamei stocks in sinaloa and sonora, mexico during 1999 and continues to cause severe shrimp losses. wssv genes encoding nucleocapsid (vp26 and vp15) and envelope proteins (vp19 and vp28) of a mexican isolate were cloned in the pmosblue vector. the nucleotide sequences of these genes were compared with wssv isolates in genbank. vp15 is highly conserved, and vp26 showed 99% homology to a chinese isolate. the vp28 fragment ... | 2008 | 18261033 |