GFP tagged Vibrio parahaemolyticus Dahv2 infection and the protective effects of the probiotic Bacillus licheniformis Dahb1 on the growth, immune and antioxidant responses in Pangasius hypophthalmus

Effect of guavaPsidium guajava(L.) aqueous extract diet on growth performance, intestinal morphology, immune response and survival ofOreochromis niloticuschallenged withAeromonas hydrophila

“…The fact that the enzyme activities were reduced showed that the extract protects against hepatic damage. The presence of metabolites such as tannins, alkaloids and saponins in the leaves of P. guajava extracts might be responsible for cell membrane protection and stability against free radical‐mediated toxicants, as attested by Gobi et al (). However, increased ALP indicates better absorption of the extract in the body of the fish, a better build‐up of liver cells and the normal functionality of the cells, when compared with the control.…”

“…According to Gobi et al (), the first line of defence against pathogens is the innate or nonspecific immune system of the fish; therefore, enhancement of the fish's immune system is considered the best way to prevent diseases. Also, SOD, Catalase (CAT), GPx, GST and GSH are considered the first line of antioxidant defence and also serve as sensitive biomarkers of oxidative stress (Carvalho, Bernusso, Araujo, Espindola, & Fernandes, ).…”

Bacillus As Potential Probiotics: Status, Concerns, and Future Perspectives

“…On the other hand, exclusion of pathogen by the inhibition of bacterial biofilm is another potential attribute proposed for Bacillus strains. In this context, Gobi et al (2016) demonstrated that the cell free extracts of B. licheniformis Dahb1 decreased the microbial adhesion to hydrocarbon, exopolysaccharide and biofilm metabolic activity, and decreased biofilm formation by the virulent V. parahaemolyticus Dahv2, in Asian catfish.…”

Frequency in the supply of Lactobacillus influence its probiotic effect for yellow tail lambari

“…The increase in leukocyte cells indicates an immunostimulation of the bloodstream cells of fish (DE PAIVA et al, 2013), demonstrating that only the constant supply (100%) of the probiotic causes a greater recruitment of monocytes and lymphocytes in yellow tail lambari. Besides this, increasing humoral and cellular immune defenses is other way to shown probiotic benefices, as shown by GOBI et al (2016) whom demonstrated an increase in serum immunological enzymes and antioxidant enzyme levels of Pangasius hypophthalmus fed with Bacillus licheniformis Dahb1. This same strain also demonstrated probiotic effects for tilapia enhancing immune parameters and activities of antioxidant enzymes in the serum and mucus (GOBI et al, 2016).…”

“…Effect of probiotics on specific growth rate and weekly gain are divergent, it is possible to find authors who prove their efficacy, improving up to 15% of the feed efficiency of animals fed with autochthonous probiotic (JATOBÁ & MOURIÑO, 2015;YAMASHITA et al, 2017), as well as others did not observed improvement in these zootechnical variables for Nile tilapia (O. niloticus) fed with probiotic (Saccharomyces cervisiae), prebiotic (mananoligosaccharide) and symbiotic (S. cervisiae + nanaoligosaccharide) (SCHWARZ et al, 2016), this divergence may be related to the specificity between host-host, justifying the best results of the autochthonous bacteria. Probiotic bacteria capable of acting in several (more than one) species are especially attractive to aquaculture, because they can be used in integrated and polyculture systems, such as Bacillus licheniformis Dahb1 which demonstrated beneficial effects for P. hypophthalmus and O. mossambicus (GOBI et al, 2016;; and L. plantarum for O. niloticus and Litopenaeus vannamei (JATOBÁ et al, 2011).…”