Crustins has been highlighted to have antimicrobial activity
against Gram-positive bacteria according to Brockton et al (2007)
and absence of which increased mortality in L. vannamei challenged
with Vibrio penaeicida (Ishimaru, Akagawa-Matsushita
& Muroga, 1995) according to Shockey et al (2009). Among
the various AMPs, lysozyme is the most well-known and has
been described in numerous phylogenetically diverse organisms
such as bacteria, bacteriophages, fungi, plants and animals
(Supungul et al 2010). It has been widely accepted as a crucial
biodefense reactor during innate immunity (Zhao et al 2007).
Increasing evidences have also demonstrated that lysozyme is
highly relevant in shrimp’s bacterial defense response