| primary diagnosis and surveillance of white spot syndrome virus in wild and farmed crawfish (procambarus clarkii, p. zonangulus) in louisiana, usa. | this is the first report of natural white spot syndrome virus (wssv) infection in wild and large-scale farmed crawfish. in the spring of 2007, 3 crawfish farms experienced heavy mortality in ponds populated by procambarus clarkii and p. zonangulus. histological examination revealed findings consistent with severe viral infection characterized by numerous intranuclear inclusions in ectodermal and mesodermal tissues. samples tested by in situ hybridization, injection bioassay in litopenaeus vannam ... | 2009 | 19593929 |