| Title: | Strain- and matrix-dependent survival of Lactobacillus acidophilus LA-5 and Lacticaseibacillus paracasei 431 in commercial ice cream bases |
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| Authors: | ID Prijatelj, Kristjan (Author)
ID Kozmos, Maša (Author)
ID Langerholc, Tomaž (Author) |
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| Files: |  https://journals.um.si/index.php/agricultura/en/article/view/6244
 RAZ_Prijatelj_Kristjan_2026.pdf (327,89 KB)
MD5: A6299AD49E3F0AE61CA86CFDBBE28100
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKBV - Faculty of Agriculture and Life Sciences
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| Abstract: | The survival of Lactobacillus acidophilus LA-5 and Lacticaseibacillus paracasei 431 was evaluated in commercially available ice cream base mixtures differing in dairy and plant-based fat content. The objective was to determine strain-dependent stability during frozen storage and to model viability loss using the Weibull inactivation equation. Following inoculation, samples were frozen and stored at −20 °C for 90 days. Viable counts were monitored periodically, and survival kinetics were described by non-log linear regression. A significant reduction in cell numbers was observed after a single freeze–thaw cycle in both strains. During subsequent storage, gradual inactivation occurred, with distinct strain- and matrix-dependent differences. L. acidophilus LA-5 showed higher stability in formulations with dairy-based fat compared with the plant-based fat, whereas L. paracasei 431 exhibited shorter predicted times to equivalent log-reductions in dairy systems. Survival curves were adequately described by the Weibull model, indicating heterogeneous resistance within bacterial populations. The results demonstrate marked strain- and formulation specific differences in probiotic stability during frozen storage and provide quantitative parameters for predicting viability loss in ice cream matrices. |
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| Keywords: | ice-cream, probiotics, Lactobacillus acidophilus, Lacticaseibacillus paracasei, frozen storage |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 14.07.2026 |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-7 |
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| Numbering: | Vol. 23, No. 1 |
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| PID: | 20.500.12556/DKUM-100390  |
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| UDC: | 579.6 |
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| ISSN on article: | 2820-610X |
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| COBISS.SI-ID: | 285239555 |
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| DOI: | 10.18690/agricsci.23.1.1 |
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| Publication date in DKUM: | 16.09.2026 |
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| Views: | 96 |
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| Downloads: | 0 |
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| Metadata: |    |
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| Categories: | Misc.
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