Antimicrobial Activity of Duck Egg Lysozyme Against Salmonella enteritidis [Not invited]
Supaporn Naknukool; Shigeru Hayakawa; Takahiro Uno; Masahiro Ogawa
Global Issues in Food Science and Technology 2009/12
This chapter highlights a study on antimicrobial activity of dLz (duck lysozyme) against Salmonella enteritidis to create an alternative agent for food preservation. It is supposed that reduced dLz could be the alternative antimicrobial agent that the food industry could supply to customers concerned about natural foods, as it proposes higher activity than reduced cLz. Also, the study investigated that food components of ingredients such as NaCl, sucrose, glucose, and BSA have antagonistic effects in antimicrobial activity of reduced Lz, while polyphosphate and lactoferrin promoted the efficiency of reduced lysozyme. Comparing the antimicrobial activity of native and reduced Lz, the reduced Lz from duck and chicken egg white demonstrated stronger antimicrobial activity against S. enteritidis than the native counterpart. The efficiency of reduced Lz against S. enteritidis from contaminated food was also investigated. The results showed that reduced Lz had wide antimicrobial efficiency against food-contaminating S. enteritidis. Moreover, reduced dLz possessed higher antimicrobial action against all tested S. enteritidis than reduced cLz. © 2009 Elsevier Inc. All rights reserved.