Culture conditions improvement of Crassostrea gigas using a potential probiotic Bacillus sp strain

It is well demonstrated that some probiotics improve rearing water quality and thereby have beneficial effects on reared organisms. We conducted this study to determine the effect of Bacillus consortium on Crassostrea gigas reared in contemned seawater with indigo dye priory treated with Bacillus or...

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Bibliographic Details
Published in:Microbial pathogenesis 2017-09, Vol.110, p.654-658
Main Authors: Fdhila, Kais, Haddaji, Najla, Chakroun, Ibtissem, Dhiaf, Amel, Macherki, Mohammed Ezz Edine, Khouildi, Bochra, Lamari, Faouzi, Chaieb, Kamel, Abid, Nabil, Marzougui, Hajer, Khouadja, Sadok, Missaoui, Hechmi
Format: Article
Language:English
Subjects:
Animals
Aquaculture - methods
Bacillus - growth & development
Bacillus consortium
Cell Survival - drug effects
Crassostrea - growth & development
Crassostrea gigas
Hemocytes - drug effects
Hemocytes - physiology
Indigo
Indigo Carmine - metabolism
Probiotics - administration & dosage
Seawater - chemistry
Vibrio - growth & development
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Summary:It is well demonstrated that some probiotics improve rearing water quality and thereby have beneficial effects on reared organisms. We conducted this study to determine the effect of Bacillus consortium on Crassostrea gigas reared in contemned seawater with indigo dye priory treated with Bacillus or no treated. This effect was studied by assessing hemocytes death using flow cytometry analysis. We found that the percentage of decolorization of indigo dye in polluted seawater in presence of C. gigas increased from 41% to 90% when using Bacillus consortium. In these conditions, the hemocytes mortality of reared C. gigas decreased from 87% to 56%. We have demonstrated also that seawater contemned with priory treated indigo with Bacillus consortium is less toxic than seawater contemned with the no treated indigo. The percentage of hemocytes death is 81% for the contemned seawater with indigo and 56% for no contemned seawater. This consortium shows a protector effect of C. gigas against Vibrio harveyi contemning reared seawater. •Bacillus sp used as safe probiotic.•Vibrio harveyi is widespread in aquaculture.•Indigo is a strongly toxic dyes.•Bacillus sp had an effect on immunity and resistance of Crassostrea gigas reared in indigo polluted seawater.
ISSN:0882-4010
1096-1208
DOI:10.1016/j.micpath.2017.07.017