materials and methods: a total of 285 commercial and traditional dairy products as well as 267 pasteurized and raw milk samples were collected during one year. the samples were studied by culturing and the positive-culture samples were investigated using pcr techniques. results: the results of culture showed that 52 (9.42%) and 28 (5.07%) of the total 552 milk and dairy samples were positive fo...

The purpose of this research was to assess the hygienic properties of commercially available dairy foods. The products surveyed included liquid milks (pasteurized and UHT-treated), cultured dairy products (kefir, cultured buttermilk, sour cream, yogurt, probiotic fermented milks), cheeses (quarg products, soft, semi-hard, hard, and extra hard cheeses made from bovine, caprine, and ovine milk), ...

Escherichia coli (E. coli) is shocked by various temperature processes in milk, which forces the organism to make proteins as a result of changes synthesis enzymes that might give strain special characteristics. The purpose this study was investigate effects heat shock factor on changing results biochemical and molecular tests among E. strains obtained from ice cream non-pasteurized milk when c...

To study the effect of processing on polybrominated biphenyl (PBB) levels, milk from four dairy herds containing less than 0.3 ppm (fat basis) of physiologically incorporated PBBs was presented individually into cream, skim milk, butter, and stirred curd cheese. Pasteurized and freeze-dried whole milk, skim milk, and cream, spray-dried whole milk and skim milk, and condensed whole milk were als...

BACKGROUND Aflatoxin M1 (AFM1), a carcinogenic substance is found in milk and dairy products. The effect of season and type of dairy products on AFMi level in northern Iran was investigated in this study. METHODS Three hundred samples (each season 75 samples) including raw and pasteurized milk, yoghurt, cheese, and cream samples were collected from three distinct milk producing farms. The sam...

This study was intended to isolate the following pathogenic bacteria; Yersinia enterocolitica, Listeria monocytogenes, Staphylococcus aureus and Salmonella species. Out of these four organisms, L. monocytogenes was not found in all samples. Pathogens were isolated from 31.4% of the 150 samples of open ice cream and 12.0% was isolated from packed ice cream. The targeted pathogens were not found ...

Although admittedly transmission of Trypanosoma cruzi infection through breastfeeding is a rare event, it involves serious risks. To test the effectiveness of pasteurization in preventing this mode of infection, three sets of samples of human milk were tested: a - contaminated with T. cruzi and pasteurized; b - contaminated with T. cruzi and non-pasteurized; c - non-contaminated and pasteurized...

of temperatures close to freezing on the storage of fish. J. Fisheries Research Board Can., 8, (2) 111. CONN, H. W. 1903 The relation of temperature to the keeping property of milk. Connecticut (Storrs) Agr. Exp. Sta. Bull. 26. DAHLBERG, A. C. 1946 The relationship of the growth of all bacteria and coliform bacteria in pasteurized milk held at refrigerator temperatures. J. Dairy Sci., 29, 651-6...

The development of alternative microbiological techniques is driven by the necessity to meet the current needs to deliver rapid results in the manufacturing process of foods, but it is important that these methods be evaluated for each application. The objective of the present study was to assess the Petrifilm™ EB and the TEMPO(®) EB systems with ISO 21528-2:2004 for the count of Enterobacteria...

Survey elicitation of consumer preferences for product attributes where survey-taker inattention bias exists can lead to irrational choices. Survey-taker measures, such as screen reading time, be confounded by repeat purchasers taking the survey. This study estimates willingness pay (WTP) farmstead milk attributes, including pasteurization type (VAT, HTST, Ultra), packaging (plastic, paper, gla...