High-pressure processing and heat treatment of Murrah buffalo milk: Comparative study on microbial changes during refrigerated storage
Issued Date
2025-01-02
Resource Type
ISSN
01681605
eISSN
18793460
Scopus ID
2-s2.0-85205417060
Pubmed ID
39368122
Journal Title
International Journal of Food Microbiology
Volume
426
Rights Holder(s)
SCOPUS
Bibliographic Citation
International Journal of Food Microbiology Vol.426 (2025)
Suggested Citation
Yu D.S.X., Hui C.K., Ismail-Fitry M.R., Koirala P., Nirmal N., Nor-Khaizura M.A.R. High-pressure processing and heat treatment of Murrah buffalo milk: Comparative study on microbial changes during refrigerated storage. International Journal of Food Microbiology Vol.426 (2025). doi:10.1016/j.ijfoodmicro.2024.110926 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/102769
Title
High-pressure processing and heat treatment of Murrah buffalo milk: Comparative study on microbial changes during refrigerated storage
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Corresponding Author(s)
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Abstract
This study aims to evaluate the effect of high-pressure processing (HPP) (500 and 600 MPa for 3 min and 5 min) on the microbial changes of Murrah buffalo milk in comparison to heat treatment (72 °C for 15 s of holding time) during refrigerated storage of 28 days. The results indicated that the total plate count (TPC) of raw milk at day 0 was 5.5 ± 0.6 log10 CFU/mL. At day 0, heat treatment lowered TPC to 3.9 ± 0.6, while HPP treatment was in the range of 4.1 ± 0.3 to 4.8 ± 0.6 log10 CFU/mL. Similarly, lowered yeast and mold count and lactic acid bacteria were noted in heat- and HPP-treated milk samples compared to the control sample during refrigerated storage. There were no Staphylococcus aureus and Escherichia coli detected in heat and HPP-treated samples. Heat or HPP treatment at 600 MPa for 5 min significantly extended the shelf-life of Murrah buffalo milk for three weeks at the refrigerated storage. In addition, HPP treatment did not alter the pH, lightness (L* value), protein, or fat content of Murrah buffalo milk during refrigerated storage. Hence HPP at 600 MPa for 5 min could be a suitable alternative to conventional heat treatment.