Genetic variation in lysozyme activity in rainbow trout (Oncorhynchus mykiss)

Family association between immune parameters and resistance to Aeromonas hydrophila infection in the Indian major carp, Labeo rohita

“…Significant genetic variation in lysozyme activity has also been reported in rainbow trout, although the heritability was low [29]. Moreover, lysozyme activity was shown to be negatively correlated with survival from disease in Atlantic salmon (furunculosis) [16] and Nile tilapia (field survival) [46].…”

Acute osmotic stress affects Tilapia (Oreochromis mossambicus) innate immune responses

“…In general, humoral innate factors, like lysozyme and complement, are important antimicrobial factors. The greatest concentration of lysozyme activity is found in the HK of fish, due to the high numbers of leukocytes [7,[15][16][17][18]. Nile tilapia cultured in 24 ppt salinity for 2 and 4 weeks, or in 12 ppt salinity for 4 weeks, showed increased lysozyme activity [19].…”

Spontaneous bactericidal and complement activities in serum of rainbow trout (Oncorhynchus mykiss) genetically selected for resistance or susceptibility to furunculosis

“…More recently Fevolden et al (1992;1993) used 'low and high-stress' (defined from their level of serum cortisol and glucose following a confinement stress) for selecting lines of rainbow trout and salmon to study the correlation of lysozyme and serum haemolytic activity with survival following A. salmonicida or Vibrio anguillarum challenges, but without clearcut results. Røed et al (1993a) tried again to compare the two above criteria on challenged salmon families and finally suggested a negative genetic correlation between these two putative markers. They concluded that lysozyme was not an adequate disease resistance marker in salmon or rainbow trout (Røed et al, 1993b).…”