On day 60, only 2 of the 11 surviving shrimps were YHV-positive by nested PCR. Precipitates of water sampled on day 7 from each of the 10 tanks were YHV-negative by PCR but YHV-positive by nested PCR (data not shown).
On day 60, only 2 of the 11 survivingshrimps were YHV-positive by nested PCR. Precipitates of watersampled on day 7 from each of the 10 tanks were YHV-negative byPCR but YHV-positive by nested PCR (data not shown).