FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (22): 336-339.doi: 10.7506/spkx1002-6630-201022073

• Analysis & Detection • Previous Articles     Next Articles

Detection and Analysis of β-Lactamase in Cheese and Whey

LIU Xiao-chuan,YU Dong-wei,ZHAO Yuan,LIU Zhi-nan,XUE Zhi-qing,LI Mei   

  1. Inner Mongolia Mengniu Dairy (Group) Co. Ltd., Hohhot 011500, China
  • Received:2009-10-12 Online:2010-11-25 Published:2010-12-29
  • Contact: LIU Xiao-chuan E-mail:xiaochuan54613@163.com

Abstract:

To explore the destination of the β-lactamases of raw milk in the process of cheese, antibiotics and β-lactamasefree raw milk was mixed with β-lactamases to a final concentration of 50 U/mL. Then the raw milk was processed to cheese according to the general procedure, and β-lactamase in the cheese and whey was determined by using E50 method and Oxford cup method. The result of β-lactamase is negative in the cheese and positive in the whey. So β-lactamase is mainly left in whey in the processing of cheese.

Key words: cheese, whey, β-lactamase, E50 method, Oxford cup method

CLC Number: