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Title: The effect of probiotic Enterococcus gallinarum L-1 on the innate immune parameters of outstanding species to marine aquaculture
Authors: Román, Lorena
Padilla, Daniel 
Acosta, Félix 
Sorroza, Lita
Fátima, El Amri
Déniz, Soraya 
Grasso, Valentina
Bravo García, Jimena 
Real Valcárcel, Fernando 
Keywords: Trout Oncorhynchus-Mykiss
Damselae Subsp Piscicida
Bacteria Lactobacillus-Rhamnosus
Grouper Epinephelus-Coioides
Sole Solea-Senegalensis, et al
Issue Date: 2015
Publisher: 0971-2119
Journal: Journal of Applied Animal Research 
Abstract: In this work, we evaluated the effect of the probiotic Enterococcus gallinarum L-1 on the cellular immune system of four different fish species of great interest in aquaculture such as gilthead sea bream (Sparus aurata), European sea bass (Dicentrarchus labrax), meagre (Argyrosomus regius) and red porgy (Pagrus pagrus). Phagocytic activity, respiratory burst and peroxidase content of leucocytes were observed 30 minutes after incubation with the probiotic E. gallinarum strain L-1, alive or inactivated with heat shock or ultraviolet (UV) light at different concentrations of 10(7), 10(8) and 10(9) cfu mL(-1) (final concentration 10(6), 10(7) and 10(8) cfu mL(-1)). E. gallinarum produced dose-dependent increments in respiratory burst in red porgy, sea bream and sea bass leucocytes. About 10(6) and 10(7) cfu mL(-1) of live and inactivated bacteria with no stimulation of the respiratory burst activity of sea bream and red porgy head kidney leucocytes was shown. The highest values of peroxidase content were observed in red porgy cells with stimulation indexes higher than 1 in each treatment. Statistical analysis revealed that differences were only significant in sea bream where UV light-inactivated bacteria denote statistically significant differences (P < 0.05) with respect to other treatments. Highest values of phagocytic activity were obtained in sea bream leucocytes incubated with live bacteria (26% +/- 1.88), where significant differences (P < 0.05) with other species were detected. Our results suggest that the in vitro assays may be useful in optimising their effective dose and viability for the immunomodulatory effects of probiotic bacteria, although in vivo studies are necessary to confirm the immunomodulatory effect of this strain.
ISSN: 0971-2119
DOI: 10.1080/09712119.2014.928635
Source: Journal of Applied Animal Research[ISSN 0971-2119],v. 43, p. 177-183
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