Effect of Heat Treatment on the Activity of the Enterococcus spp. and Escherichia coli Nissle 1917 in the Presence of Lactulose and Apple and Orange Extracts

Document Type : Original Article

Authors

Dairy Department, Faculty of Agriculture, Mansoura University

Abstract

The present studies are carried out to elucidate the following; Effect of heat on the activity of the Enterococcus spp. isolates and Escherichia coli Nissle 1917  in the presence of lactulose and apple and orange extracts. During the course of examination the activity of certain specie of bacteria, namely Enterococcus molodoratus, Enterococcus faecles, Enterococcus faecium and Eschericia coili nissilewere examined for their activity at 55, 60 and 65°C.durin the incubation for different times. Rsults revealed wide variation according to the tested organism, temperature and the exposure time. For the enumeration of the examined cultures, the Mac Konkey agar No.3 was used for the Escherichia  coli, and tryptone soy agar was used for the Entreococcus spp.  Survival of the examined strains were tested at 55, 60, 65°C.

Keywords

Journal of Food and Dairy Sciences
Volume 11, Issue 2
February 2020
Pages 59-63

Files

Share

How to cite

Statistics