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  • The objective was to determine the effects of freezing and subsequent storage on quantitative results of bacteriologic culturing of selected alimentary pathogens and indicator microorganisms in milk. It was documented that freezing had a considerable adverse effect on the recovery of shigatoxigenic E. coli after 7 days of storage. Decline in counts of coliform bacteria and psychrotrophic microorganisms was detected as soon as after 72 hours storage. The decline in counts of E. coli and psychrotrophic microorganisms continued with the time of storage. In contrast, no effect was recorded for L. monocytogenes and total bacterial count. Freezing caused a slight increase in S. aureus counts in milk samples after 72 hours and 7 days of storage. The results of this study indicate that freezing of milk samples is unsuitable for sample storage before the assessment of hygienic quality because potential misdiagnosis may be high.
  • The objective was to determine the effects of freezing and subsequent storage on quantitative results of bacteriologic culturing of selected alimentary pathogens and indicator microorganisms in milk. It was documented that freezing had a considerable adverse effect on the recovery of shigatoxigenic E. coli after 7 days of storage. Decline in counts of coliform bacteria and psychrotrophic microorganisms was detected as soon as after 72 hours storage. The decline in counts of E. coli and psychrotrophic microorganisms continued with the time of storage. In contrast, no effect was recorded for L. monocytogenes and total bacterial count. Freezing caused a slight increase in S. aureus counts in milk samples after 72 hours and 7 days of storage. The results of this study indicate that freezing of milk samples is unsuitable for sample storage before the assessment of hygienic quality because potential misdiagnosis may be high. (en)
  • Předmětem této studie je zhodnocení vlivu zmražení a následného uchovávání vzorku mléka na kvantitativní výsledky bakteriologické kultivace vybraných alimentárních patogenů a indikátorových mikroorganismů. Bylo prokázáno, že zmražení má výrazně nepříznivý vliv na zpětné stanovení shigatoxinogeních E. coli po 7 dnech uchovávání. Byl zaznamenán úbytek počtu koliformních bakterií a psychrotrofních mikroorganismů již po 72 hodinách. Pokles počtu E. coli a psychrotrofních mikroorganismů se prohluboval s délkou úchovy v zamraženém stavu. Naopak nebyl zaznamenán vliv zmražení na L. monocytogenes a na celkový počet mikroorganismů. Zmražení způsobilo mírný nárůst počtu S. aureus ve vzorcích mléka po 72 hodinách a 7 dnech skladování. Výsledky této studie ukazují, že vzorky určené k hodnocení hygienické kvality mléka nelze uchovávat v zamraženém stavu, protože výsledky mohou být zmražením výrazně ovlivněny. (cs)
Title
  • Effect of freezing milk samples on the recovery of alimentary pathogens and indicator microorganisms
  • Vliv zmražení vzorků mléka na recovery alimentárních patogenů a indikátorových mikroorganismů (cs)
  • Effect of freezing milk samples on the recovery of alimentary pathogens and indicator microorganisms (en)
skos:prefLabel
  • Effect of freezing milk samples on the recovery of alimentary pathogens and indicator microorganisms
  • Vliv zmražení vzorků mléka na recovery alimentárních patogenů a indikátorových mikroorganismů (cs)
  • Effect of freezing milk samples on the recovery of alimentary pathogens and indicator microorganisms (en)
skos:notation
  • RIV/00027162:_____/07:#0000186!RIV08-MZE-00027162
http://linked.open.../vavai/riv/strany
  • 301;307
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MZE0002716201)
http://linked.open...iv/cisloPeriodika
  • 2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 418932
http://linked.open...ai/riv/idVysledku
  • RIV/00027162:_____/07:#0000186
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • hygienic quality; E. coli; S. aureus; L. monocytogenes; psychrotrophic microorganisms; coliform bacteria; total bacterial count (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CZ - Česká republika
http://linked.open...ontrolniKodProRIV
  • [DAE8AD59A4A3]
http://linked.open...i/riv/nazevZdroje
  • Acta Veterinaria Brno
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 76
http://linked.open...iv/tvurceVysledku
  • Ryšánek, Dušan
  • Hubáčková, Monika
http://linked.open...n/vavai/riv/zamer
issn
  • 0236-6290
number of pages
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