ANTIBACTERIAL EFFECT OF THE INDIAN SQUID, LOLIGO DUVAUCELI (d'Orbigny), INK
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Authors
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Vivek Nirmale
Central Institute of Fisheries Education, Versova, Mumbai - 400 061
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B. B. Nayak
Central Institute of Fisheries Education, Versova, Mumbai - 400 061
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S. Kannappan
Central Institute of Fisheries Education, Versova, Mumbai - 400 061
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S. Basu
Central Institute of Fisheries Education, Versova, Mumbai - 400 061
Abstract
The ink of the Indian squid Loligo duvauceli (d'Orbigny) was tested for
antibacterial activity. The antibacterial effect of bacteria present in the ink
gland was also tested. Only one type of bacteria was found to be present in
the ink gland of squid and was identified as Photobacterium leiognathi. Among
the various forms of ink extracts, the precipitated and freeze-dried ink showed
more pronounced antibacterial effect against Gram-negative bacteria,
Salmonella, spp. Escherichia coli, Vibrio cholerae, V. parahaemolyticus and
Pseudomonas spp., and a less pronounced effect against Gram-positive
bacteria, Staphylococcus spp. and Micrococcus spp. P. leiognathi did not inhibit
any of the above bacteria. The antibacterial activity was associated with the
compounds of the ink.
Keywords :Antibacterial activity, ink, Indian squid
