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El-Hajjaji S, Gérard A, De Laubier J, Lainé A, Patz V, Sindic M. Study of the bacterial profile of raw milk butter, made during a challenge test with Listeria monocytogenes, depending on cream maturation temperature. Food Microbiol 2021; 98:103778. [PMID: 33875207 DOI: 10.1016/j.fm.2021.103778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 10/22/2022]
Abstract
Bacteria can play different roles and impart various flavors and characteristics to food. Few studies have described bacterial microbiota of butter. In this study, next-generation sequencing was used to determine bacterial content of raw milk butter, processed during a challenge test, depending on cream maturation temperature and on the presence or not of L. monocytogenes. Two batches were produced. pH and microbiological analyses were conducted during cream maturation and butter storage. DNA was also isolated from all samples for 16S rRNA amplicon sequencing analysis. For butter made from cream matured at 14 °C, a growth potential of L. monocytogenes of - 1.72 log cfu/g was obtained. This value corresponds to the difference between the median of counts at the end of storage and the median of counts at the beginning of storage. This butter (pH value of 4.75 ± 0.04) was characterized by a dominance of Lactococcus. The abundance of Lactococcus was significantly higher in inoculated samples than in control samples (p value < 0.05). Butter made from cream matured at 4 °C (pH value of 6.81 ± 0.01) presented a growth potential of 1.81 log cfu/g. It was characterized by the abundance of psychrotrophic bacteria mainly Pseudomonas. This study demonstrated that cream maturation temperature impacts butter microbiota, affecting thus product's characteristics and its ability to support or not the growth of pathogens like L. monocytogenes.
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Affiliation(s)
- Soundous El-Hajjaji
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium.
| | - Amaury Gérard
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Juliette De Laubier
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Aurélie Lainé
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Viviane Patz
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium
| | - Marianne Sindic
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030, Gembloux, Belgium
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El-Hajjaji S, Gérard A, Sindic M. Is Butter A Product at Risk Regarding Listeria Monocytogenes? - A Review. FOOD REVIEWS INTERNATIONAL 2020. [DOI: 10.1080/87559129.2020.1831528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Soundous El-Hajjaji
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Amaury Gérard
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Marianne Sindic
- Laboratory of Quality and Safety of Agro-food Products, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
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El-Hajjaji S, Gérard A, De Laubier J, Di Tanna S, Lainé A, Patz V, Sindic M. Assessment of growth and survival of Listeria monocytogenes in raw milk butter by durability tests. Int J Food Microbiol 2020; 321:108541. [DOI: 10.1016/j.ijfoodmicro.2020.108541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 11/04/2019] [Accepted: 01/26/2020] [Indexed: 10/25/2022]
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Soundous E, Amaury G, Juliette DL, Sybille DT, Aurélie L, Viviane P, Marianne S. Overview of the local production process of raw milk butter in Wallonia (Belgium). INT J DAIRY TECHNOL 2019. [DOI: 10.1111/1471-0307.12608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- El‐Hajjaji Soundous
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - Gérard Amaury
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - De Laubier Juliette
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - Di Tanna Sybille
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - Lainé Aurélie
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - Patz Viviane
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
| | - Sindic Marianne
- Laboratory of Quality and Safety of Agro‐food Products Gembloux Agro‐Bio Tech University of Liège Passage des Déportés, 25030Gembloux Belgium
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Andritsos ND, Kallitsis T, Roukas D. Growth potential of
Listeria monocytogenes
in ready‐to‐eat Feta cheese‐based sauce stored at 4°C. J Food Saf 2018. [DOI: 10.1111/jfs.12599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Dimokritos Roukas
- Athens Analysis Laboratories S.A., Microbiology Laboratory Athens Greece
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