Table 2: Indigenous microbiota of shrimp and their significance.

Name of the organismSignificanceReferences

Aeromonas media A199Decrease of mortality and suppression of the pathogen of Pacific oyster larvae when challenged with a pathogenic Vibrio tubiashii [24]

Plesiomonas spps.Show inhibitory activity against primary pathogens Pseudomonas aeruginosa, P.  fluorescens, secondary pathogens Salmonella, Shigella, E.  coli, Streptococcus [25]

Pseudomonas spp.Potential antagonistic bacterium against pathogenic vibrios in penaeid shrimp. Produces extracellular antivibrio component[26]

Enterobacteriaceae Indicators of hygienic quality of foods and water. Their presence in prawn may be attributed to the feed or animal manure commonly used to fertilize ponds[27]

Vibrio P62, Vibrio P63Immunostimulatory effect in Penaeus vannamei [28]
V.  harveyi Cause vibriosis in shrimp[29]

Bacillus strain S11Better yield and good control of disease and immunity enhancement in Penaeus monodon [30]

Lactic acid bacteria
Lactobacillus plantarum
Stimulate nonspecific immune response in Litopenaeus vannamei when challenged with V.  harveyi [31]