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Table 4 Repartition of OsHV-1 negative and positive samples according to mortality characteristics in the field (A) or nursery (B) (*p < 0.001; ns: non-significant)

From: Ostreid herpesvirus 1 detection and relationship with Crassostrea gigas spat mortality in France between 1998 and 2006

a      
  Field samples
OsHV-1 PCR results Mortality pattern* Mortality development
  Patchy Uniform Concentric Acute Chronic
Positive 44 14 0 56 2
Negative 42 92 8 120 22
Total 86 106 8 176 24
b      
  Nursery samples
OsHV-1 PCR results Mortality pattern ns Mortality development*
  Patchy Uniform Concentric Acute Chronic
Positive 5 30 0 34 1
Negative 3 24 0 15 12
Total 8 54 0 49 13