Month Purification time (hours) NRR*
 

 

Mussels parasitized with Marteilia spp. Marteilia-free mussels
  0 21 30
May 24 28 38

 

48 26 40
  0 17 47
June 24 30 30

 

48 24 23
  0 21 38
October 24 21 29

 

48 24 27
*expressed as number of stable cells out of 50
Table 3: Results of the Neutral Red Retention Test performed on parasitized and parasite-free mussels (M. galloprovincialis) at different purification times.