Abstract:
AIM:To assess Pediococcus acidilactici as a dietary supplement for on-growing red tilapia (Oreochromis niloticus). METHODS AND RESULTS:Tilapia were fed either a control diet or control diet supplemented with Ped. acidilactici at 10(7) CFU g(-1) for 32 days. Ped. acidilactici colonized the intestinal tract and significantly affected the intestinal microbial communities. PCR-DGGE revealed direct antagonism of gastric Ped. acidilactici with an endogenous uncultured bacterium during a period of reverting to nonsupplemented feeding. Light microscopy revealed that gut integrity and leucocyte levels were unaffected by Ped. acidilactici; however, blood leucocyte levels and serum lysozyme activity were elevated after 14-days' feeding. No significant improvements in growth performance were observed at the end of the trial (day 32), but survival was significantly higher in the probiotic group. CONCLUSIONS: The study demonstrates that oral supplementation of Ped. acidilactici modulates intestinal bacterial communities in on-growing red tilapia and also stimulates some aspects of the nonspecific immune response. SIGNIFICANCE AND IMPACT OF THE STUDY: To our knowledge this is the first study assessing the effects of probiotics on the gut microbiota of tilapia using culture-independent methods. Such methods are crucial to understand the mechanisms which underpin and mediate host benefits.
journal_name
J Appl Microbioljournal_title
Journal of applied microbiologyauthors
Ferguson RM,Merrifield DL,Harper GM,Rawling MD,Mustafa S,Picchietti S,Balcázar JL,Davies SJdoi
10.1111/j.1365-2672.2010.04713.xsubject
Has Abstractpub_date
2010-09-01 00:00:00pages
851-62issue
3eissn
1364-5072issn
1365-2672pii
JAM4713journal_volume
109pub_type
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