The data reported here are consistent with WTD in Australian Macrobrachium rosenbergiicaused by
MrNV. The gross clinical signs, the histopathology, both of which are not pathognomonic for WTD, the genomic RNA sequence relationships and the ability to fulfil River’s postulates support the conclusion that MrNV is present in Australia, which was previously declared free of this disease (Ernst 2007). WTD is a notifiable disease to the Office International des Epizooties (OIE) and as such,this case was reported to government authorities and confirmed by analyses undertaken at the Australian Animal Health Laboratories. OIE was notified formally
in February 2008.