APOA1 and infection: Similarly, apolipoprotein A1 and 14 kDa apolipoprotein, two major components of high density lipoproteins (HDL) and synthesized in the fish liver [41], also show a differential expression in the liver of fish infected with V. anguillarum and Nodavirus following the time course and, therefore, they also may be good candidate indicators of the fish health status and/or the type of infection.