Bright Singh, I S; Anas, A; Paul, S; Jayaprakash, N S; PhIlip, R(Inter-Research, November 9, 2005)
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Abstract:
Chitosan is a biocompatible and biodegradable natural polymer with established
antimicrobial properties against specific microorganisms. The present study demonstrates its
antibacterial activity against 48 isolates of Vibrio species from prawn larval rearing systems. The
antibacterial activity had a positive correlation with the concentration of chitosan. This work opens
up avenues for using chitosan as a prophylactic biopolymer for protecting prawn larvae from
vibriosis.
Bright Singh, I S; Preetha, R; Jayaprakash, N S(Inter-Research, March , 2007)
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Abstract:
Synechocystis MCCB 114 and 115 were segregated as putative probionts for shrimp
larvae from a collection of 54 cyanobacterial cultures enriched from seawater. On feeding Penaeus
monodon post-larvae with the cyanobacteria, the generic diversity of the intestinal bacterial flora
could be enhanced with substantial reduction or total absence of Vibrio spp. A significant difference
(p < 0.001) in the percent survival of batches of post-larvae fed on the cyanobacterial cultures was
observed and, on repeated challenge with V. harveyi, the relative percent survival of those batches
of larvae fed on Synechocystis MCCB 114 and 115 was significantly higher. The Synechocystis
MCCB 114 and 115 cultures were found to contain high levels of protein (34 to 43%), in addition to
carotenoids