Contribution to the debate on the microbiological quality of raw milk from vending machines

Authors

  • Ľubomí­r Valí­k Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava
  • Alžbeta Medveďová Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava
  • Lucia Bí­rošová Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava
  • Denisa Liptáková Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava
  • Ladislav Ondruš Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava
  • Ján Šnelcer Department of Nutrition and Food Safety, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava

DOI:

https://doi.org/10.5219/98

Keywords:

raw milk, microbiological quality

Abstract

Microbiological quality or raw milk from vending maschine was analyzed in this work. Despite the pathogenic bacteria may be present in raw milk, the analyses and evaluations were focused to bacterial indicators only. Refer to total bacterial counts, the criterion ≤ 100,000 cfu/ml met 12 from 15 samples (80%) and all samples complied with the supplementary criterion of 5×104cfu/ml for psychrotrophs. Numbers of coagulase-positive staphylococci ranged closely around the average value 2.9×102cfu/ml. Average numbers of coliforms and E. coli in raw milk were found 4.34 ± 0.42 and 3.25 ± 0.83 log CFU/ml, respectively. These values significantly exceeded even the limits applicable in the past. On the basis of unchanged numbers of these bacteria in milk after 24 h at 6 °C, we assume that the high numbers of coliforms and E. coli present in milk are the result of fecal contamination and not growth. As E. coli is an indicator of faecal contamination of raw milk comprising the possible presence of Salmonella sp. Campylobacter sp. and other pathogens, microbiological survey suggested appropriate preventive measures that should be applied in terms of risk management.

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Published

2011-06-14

How to Cite

Valí­k, Ľubomí­r ., Medveďová, A. ., Bí­rošová, L. ., Liptáková, D. ., Ondruš, L. ., & Šnelcer, J. . (2011). Contribution to the debate on the microbiological quality of raw milk from vending machines. Potravinarstvo Slovak Journal of Food Sciences, 5(3), 38–43. https://doi.org/10.5219/98

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