Published in Scientific Works. Series C. Veterinary Medicine, Vol. LIX (1)
Written by ZORITA MARIA COCORA, IOAN TIBRU
This study aimed to analyse the influence of refrigeration on Salmonella.Two register strains have been used – S. Enteritidis (D) (ATCC 13076) and S. Typhimurium (ATCC14028), each having a known load of 28*107, respectively 40*107. The two strains have been subjected to temperature variations as such: 1.-18°C for 1 h 45 min; 2. 2-4°C for 6 h after the first stage; 3. 2°C for 10 h after the second stage.The collected samples have been analyzed according to ISO 6579:2002. The results have shown that after quick refrigeration (-18°C for 1 h 45 min), the S. enteritidis and S. typhimurium microorganisms at the load of 22 log ufc/cm2, respectively 44 log ufc/cm2 could not be noticed. The other two variations (2-4°C for 6 h and 2°C for 10 h) did not have any effect on the two Salmonella strains, no matter the UFC number used. We can affirm that the temperature of-18°C prevent the multiplication of microorganisms only if the microbial load is reduced, and once with increasing temperature the microorganisms have been highlighted.
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