Incidence of enterococcal deoxyribonuclease and thermonuclease in raw milk and white cheese

Citak S., Yucel N., Mendi A.

INDIAN VETERINARY JOURNAL, vol.81, no.7, pp.803-805, 2004 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 81 Issue: 7
  • Publication Date: 2004
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.803-805


The wide distribution of the enterococci and their resistance of pasteurization temperatures implied that this group of microorganisms may also gain access to heat-treated milk and milk products. As regular inhabitants of the intestine, enterococci may serve as indicators of faecal contamination, and are therefore of particular importance in food and public health microbiology. Many enterococcal isolates from dairy products have been reported to produce DNases that resist boiling for 15 min, like the thermonucleases elaborated by S. aureus and hence, they may interfere with the TNase test frequently used for the screening of foods for presence of Staphylococcal enterotoxins (Bissonnette et al., 1980; Batish et al., 1978). The objective of this study was to determine the incidence of DNase and TNase producing enterococcus species (E. faecalis, E. faecium) in raw milk and white cheese samples.