| genotyping of white spot syndrome virus (wssv) geographical isolates from brazil and comparison to other isolates from the americas. | white spot syndrome virus (wssv) is a viral pathogen that has caused significant economic losses in shrimp farming. variable-number tandem repeats (vntrs) (open reading frame [orf] 94, 125 and 75), a large deletion (orf 23/24) and a transposase were proposed as molecular markers for genotyping. wssv-infected shrimp litopenaeus vannamei were collected in 2 brazilian regions (santa catarina and bahia) from 2005 to 2008. dna was extracted and pcr of the variable regions was performed, followed by s ... | 2010 | 20225670 |