Immune responses of resistant and sensitive common carp families following experimental challenge with Aeromonas hydrophila

Selection for improved resistance to Aeromonas hydrophila in Indian major carp Labeo rohita: Survival and innate immune responses in first generation of resistant and susceptible lines

“…Sahoo et al [20] growth with aeromoniasis resistance. Similarly, naïve resistant and susceptible common carp families generated against A. hydrophila did not show any significant change in natural antibody titre [15]. However, the noticed higher specific antibody titre after challenge with A. hydrophila in survivors of resistant families as compared to susceptible families possibly did not reveal much for use of this trait as marker.…”

“…The possible reason might be the segregation of these parameters in the higher and lower responder families that were being considered in this study. However, Ardo et al [15] could not observe any difference in phagocytic activity between naïve common carp resistant and susceptible lines. On the other hand, they noticed higher phagocytic activity in resistant fish after A. hydrophila challenge as compared to susceptible families.…”

“…Genetic transmission of innate resistance to several bacterial diseases was first documented in salmonids and carps [6e8] and substantial genetic variation in resistance to furunculosis in Atlantic salmon (Salmo salar) [9e11], viral haemorrhagic septicaemia in rainbow trout [12], aeromoniasis in Nile tilapia (Oreochromis niloticus) [13], L. rohita [14] and in common carp [15] have been reported. The direct method of selection, i.e.…”

Polysaccharides from marine macroalga, Padina gymnospora improve the nonspecific and specific immune responses of Cyprinus carpio and protect it from different pathogens

“…Previous studies have shown that increase of lysozyme activity in C. carpio through the administration of immunostimulants had protected the fish from A. hydrophila infection (Anbazahan et al 2014). C. carpio that were naturally resistant to A. hydrophila showed enhanced lysozyme activity upon experimental challenge with A. hydrophila (Ardó et al 2010). In the present study with the PF of P. gymnospora, enhanced lysozyme activity was observed.…”

Cathepsin L in the orange-spotted grouper, Epinephelus coioides: molecular cloning and gene expression after a Vibrio anguillarum challenge

“…Immune responses in fish can be experimentally stimulated by bacteria (Dlerckens et al 2009;Ardó et al 2010). Vibriosis is one of the most prevalent diseases of groupers and many other marine fishes caused by Vibrio anguillarum and other Vibrio species (Woo and Bruno 1999).…”