International Journal of Dairy Science1811-97431811-9751Asian Network for Scientific Information10.3923/ijds.2011.72.78Nimatullah Al-BaarriAhmad OgawaMasahiro HayakawaShigeru 1201161The purpose of this study is to investigate the potential antimicrobial effect of non-dialyzed, dialyzed and freeze-dried whey against S. enteritidis and the effect of storage condition on lactoperoxidase (LPO) activity. The LPO activity of all forms of whey was studied at -20, 4 and 25°C during 4 weeks storage for LPO activity. The results showed that all forms of whey had antimicrobial activity against S. enteritidis. The various forms of whey had no remarkable differences on the antimicrobial activity. When all forms of whey was stored at 25°C, their LPO activity terminated within 2 weeks or less. LPO activity of non-dialyzed and dialyzed whey when stored at 4°C, decreased remarkably within 4 weeks. However, the decrease of LPO activity during 4 weeks storage was not found in freeze-dried whey. All forms of whey stored at -20°C kept a stable LPO activity for 4 weeks. These results suggested that whey (non-dialyzed and dialyzed) and freeze-dried whey should be stored at 4°C or less, in order to keep LPO activity.]]>Al-Baarri, A.N., M. Hayashi, M. Ogawa and S. Hayakawa,20102010Aune, T.M. and E. L. Thomas,197780209214Whetstine, M.E.C., A.E. Croissant and M.A. Drake,20058838263839Chattopadhyay, K. and S. Mazumdar,200039263270Clausen, M.R., L.H. Skibsted and J. Stagsted,20085686928698Dajanta, K., E. Chukeatirote and A. Apichartsrangkoon,20083112116Drgalic, I., L. Tratnik and R. Bozanic,200585171179Fonteh, F.A., A.S. Grandison and M.J. Lewis,200558233236Ha, E. and M.B. Zemel,200314251258Ji, T. and Z.U. Haque,200338453461Klibanov, A.M.,197993125Klibanov, A.M.,2001409241246Kosikowski, F.V.,19796211491160Kussendrager, K.D. and A.C. van Hooijdonk,2000841925Madureira, A.R., C.I. Pereira, A.M.P. Gomes, M.E. Pintado and F.X. Malcata,20074011971211Nakano, T. and L. Ozimek,20002210811086Nino, G.D., M. Turacchio, A.A. D'Archivio, S. Lora, B. Corain and G. Antonini,200461411419Pescuma, M., E.M. Hebert, F. Mozzi and G.F. de Valdez,200825442451Puangmanee, S., S. Hayakawa, Y. Sun and M. Ogawa,200814457466Mistry, V.V., L.E. Metzger and J.L. Maubois,19967911371145Reiter, B.,19853281336Reiter, B. and B.G. Harnulv,198447724732Saw, C.B., B.C. Wen, K. Anderson, E. Pennington and D.H. Hussey et al.,19988149151Seifu, E., E.M. Buys and E.F. Donkin,200516137154Shah, N.P.,200084S3S10Singh, A.K., N. Singh, S. Sharma, K. Shin and M. Takase et al.,200996646654Tamiya, T., N. Okahashi, R. Sakuma, T. Aoyama, T. Akahane and J.J. Matsumoto,198522446456Tayefi-Nasrabadi, H. and R. Asadpour,2008Bubalus bubalis) lactoperoxidase activity in raw milk.]]>813101315Touch, V., S. Hayakawa, S. Yamada and S. Kaneko,2004Salmonella enteritidis in animal or vegetable foods.]]>93175183Wit, J.N. de and A.C.M. van Hooydonk,199650227244Wlerzbicki, L.E. and F.V. Kosikowski,1973562632Wolfson, L.M. and S.S. Sumner,199356887892Zhou, Y. and L.T. Lim,200974C170C176