The effects of brine concentration and scalding on survival of some pathogens in urfa cheese: a traditional white-brined turkish cheese

Ozer H., Uraz G., Beyzi-Yilmaz E., Atasoy A.

INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, cilt.39, sa.7, ss.727-735, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 7
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1111/j.1365-2621.2004.00837.x
  • Dergi Adı: INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.727-735
  • Anahtar Kelimeler: brining, cow's milk, microbiological safety, pathogens, salt concentration, salt penetration, scalding, storage, white cheese, ESCHERICHIA-COLI 0157-H7, YERSINIA-ENTEROCOLITICA, HEAT RESISTANCE, WATER ACTIVITY, MILK, SALMONELLA, GROWTH
  • Gazi Üniversitesi Adresli: Evet

Özet

The survival of Staphylococcus aureus (St. aureus), Bacillus cereus, Yersinia enterocolitica, Eschericia coli O157:H7, Shigella flexneri (Sh. flexneri) and Salmonella enteritidis (Sa. enteritidis) in urfa cheese (a traditional white-brined Turkish cheese) which was stored in brine concentrations varying from 12.5 to 17.5% (wt/v) was tested. Two sets of cheeses were made, namely scalded and unscalded cheeses (scalding was done by heating at 95degreesC for 3 min). The variations in the counts of pathogenic colonies were monitored throughout a 90-day storage period at <10degreesC. Results indicated that scalding caused statistically significant reductions in the colony counts of Y. enterocolitica, E. coli O157:H7, Sh. flexneri and Sa. enteritidis during the early periods of storage. In contrast, St. aureus and B. cereus were not generally affected by scalding and brine concentrations, although B. cereus in 17.5% (wt/v) brine was affected. In the unscalded cheeses, 12.5 and 15.0% (wt/v) brine concentrations seemed to be insufficient to eradicate the pathogenic organisms examined.