1
|
Perdomo A, Calle A. Assessment of microbial communities in a dairy farm from a food safety perspective. Int J Food Microbiol 2024; 423:110827. [PMID: 39043054 DOI: 10.1016/j.ijfoodmicro.2024.110827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 07/11/2024] [Accepted: 07/14/2024] [Indexed: 07/25/2024]
Abstract
Microbial communities associated with dairy farm operations have a significant influence on food safety, dairy product quality, and animal health. This study aimed to create a microbial mapping at a dairy farm to learn about their bacterial diversity, distribution, and potential dissemination pathways. The investigation included the detection of key zoonotic pathogens, enumeration of Staphylococcus aureus and Escherichia coli as indicators of typical bacterial loads in a dairy production environment, and a microbiome analysis using metagenomics. A total of 160 samples (environmental, udder swabs, feed, feces, raw milk, and water) were collected during winter (N = 80) and spring (N = 80). In winter, Cronobacter spp. were detected in four feed and two water samples; L. monocytogenes was identified in two samples, one from feces and one from a cattle mat; E. coli O157:H7 was found in two feed samples. On the other hand, during spring, Cronobacter spp. were present in four feed samples and one hallway drain, with only one feed sample testing positive for E. coli O157:H7, while L. monocytogenes was absent during the spring season. Regarding microbial counts, there was no significant difference between the two seasons (p = 0.068) for S. aureus; however, a significant difference (p = 0.025) was observed for E. coli. Environmental microbiome analysis showed the presence of Proteobacteria (46.0 %) and Firmicutes (27.2 %) as the dominant phyla during both seasons. Moraxellaceae (11.8 %) and Pseudomonadaceae (10.62 %) were notable during winter, while Lactobacillaceae (13.0 %) and Enterobacteriaceae (12.6 %) were prominent during spring. These findings offer valuable insights into microbial distribution within a dairy farm and potential risks to animal and human health through environmental cross-contamination.
Collapse
Affiliation(s)
- Angela Perdomo
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX 79106, USA
| | - Alexandra Calle
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX 79106, USA.
| |
Collapse
|
2
|
Paiva NML, Ribeiro SC, Rosa HJD, Silva CCG. Comparative study of the bacterial community of organic and conventional cow's milk. Food Microbiol 2024; 120:104488. [PMID: 38431314 DOI: 10.1016/j.fm.2024.104488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/01/2024] [Accepted: 02/04/2024] [Indexed: 03/05/2024]
Abstract
Agricultural practises such as conventional and organic farming can potentially affect the microbial communities in milk. In the present study, the bacterial diversity of milk was investigated using high-throughput sequencing on ten organic and ten conventional farms in the Azores, a region where milk production is largely based on year-round grazing systems. The microbiota of milk from both production systems was dominated by Bacillota, Pseudomonadota, Actinomycetota and Bacteroidota. The organic milk showed greater heterogeneity between farms, as reflected in the dispersion of diversity indices and the large variation in the relative abundances of the dominant genera. In contrast, conventionally produced milk showed a high degree of similarity within each season. In the conventional production system, the season also had a strong influence on the bacterial community, but this effect was not observed in the organic milk. The LEfSe analysis identified the genus Iamia as significantly (p < 0.05) more abundant in organic milk, but depending on the season, several other genera were identified that distinguished organic milk from conventionally produced milk. Of these, Bacillus, Iamia and Nocardioides were associated with the soil microbiota in organic farming.
Collapse
Affiliation(s)
- Nuno M L Paiva
- School of Agrarian and Environmental Sciences, University of the Azores, Angra do Heroísmo, Azores, Portugal
| | - Susana C Ribeiro
- Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, Angra do Heroísmo, Azores, Portugal
| | - Henrique J D Rosa
- School of Agrarian and Environmental Sciences, University of the Azores, Angra do Heroísmo, Azores, Portugal; Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, Angra do Heroísmo, Azores, Portugal
| | - Célia C G Silva
- School of Agrarian and Environmental Sciences, University of the Azores, Angra do Heroísmo, Azores, Portugal; Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, Angra do Heroísmo, Azores, Portugal.
| |
Collapse
|
3
|
Luziatelli F, Abou Jaoudé R, Melini F, Melini V, Ruzzi M. Microbial Evolution in Artisanal Pecorino-like Cheeses Produced from Two Farms Managing Two Different Breeds of Sheep (Comisana and Lacaune). Foods 2024; 13:1728. [PMID: 38890955 PMCID: PMC11171825 DOI: 10.3390/foods13111728] [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: 04/12/2024] [Revised: 05/27/2024] [Accepted: 05/29/2024] [Indexed: 06/20/2024] Open
Abstract
"Pecorino" is a typical semi-hard cheese obtained with raw or heat-treated sheep milk using procedures to valorize the raw material's chemical and microbiological properties. In the present study, using a high-throughput method of 16S rRNA gene sequencing, we assessed the evolution of the microbiome composition from milk to Pecorino-like cheese in artisanal processes using milk from Comisana and Lacaune sheep breeds. The comparative analysis of the bacterial community composition revealed significant differences in the presence and abundance of specific taxa in the milk microbiomes of the Comisana and Lacaune breeds. Next-Generation Sequencing (NGS) analysis also revealed differences in the curd microbiomes related to dairy farming practices, which have a relevant effect on the final structure of the Pecorino cheese microbiome.
Collapse
Affiliation(s)
- Francesca Luziatelli
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, 01100 Viterbo, Italy; (R.A.J.); (M.R.)
| | - Renée Abou Jaoudé
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, 01100 Viterbo, Italy; (R.A.J.); (M.R.)
| | - Francesca Melini
- Council for Agricultural Research and Economics (CREA), Research Centre for Food and Nutrition, 00178 Rome, Italy; (F.M.); (V.M.)
| | - Valentina Melini
- Council for Agricultural Research and Economics (CREA), Research Centre for Food and Nutrition, 00178 Rome, Italy; (F.M.); (V.M.)
| | - Maurizio Ruzzi
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, 01100 Viterbo, Italy; (R.A.J.); (M.R.)
| |
Collapse
|
4
|
Borş A, Borş SI, Floriștean VC. Health-Related Outcomes and Molecular Methods for the Characterization of A1 and A2 Cow's Milk: Review and Update. Vet Sci 2024; 11:172. [PMID: 38668439 PMCID: PMC11053430 DOI: 10.3390/vetsci11040172] [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: 03/05/2024] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 04/29/2024] Open
Abstract
A new trend in cow's milk has emerged in the market called type A1 and A2 milk. These products have piqued the interest of both consumers and researchers. Recent studies suggest that A2 milk may have potential health benefits beyond that of A1 milk, which is why researchers are investigating this product further. It is interesting to note that the A1 and A2 milk types have area-specific characteristics compared to breed-specific characteristics. Extensive research has focused on milk derivatives obtained from cow's milk, primarily through in vitro and animal studies. However, few clinical studies have been conducted in humans, and the results have been unsatisfactory. New molecular techniques for identifying A1 and A2 milk may help researchers develop new studies that can clarify certain controversies surrounding A1 milk. It is essential to exercise extreme caution when interpreting the updated literature. It has the potential to spread panic worldwide and have negative economic implications. Therefore, this study aims to investigate the differences between A1 and A2 milk in various research areas and clarify some aspects regarding these two types of milk.
Collapse
Affiliation(s)
- Alina Borş
- Department of Public Health, Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” Iasi University of Life Sciences, 700489 Iaşi, Romania; (A.B.); (V.-C.F.)
| | - Silviu-Ionuț Borş
- Research and Development Station for Cattle Breeding Dancu, 707252 Iaşi, Romania
| | - Viorel-Cezar Floriștean
- Department of Public Health, Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” Iasi University of Life Sciences, 700489 Iaşi, Romania; (A.B.); (V.-C.F.)
| |
Collapse
|
5
|
Somrup S, Mitsuwan W, Bhumibhamon T, Pereira MDL, Paul AK, Nissapatorn V, Saengsawang P. Antibiograms, multidrug resistance, and milk-related parameters of bacteria isolated from milk of dairy cattle in Phatthalung, Thailand. Vet World 2024; 17:735-743. [PMID: 38798280 PMCID: PMC11111717 DOI: 10.14202/vetworld.2024.735-743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 03/01/2024] [Indexed: 05/29/2024] Open
Abstract
Background and Aim Milk, a nutritious food, is widely consumed in human diets; however, contamination by micro-organisms can negatively impact its quality and consumer health. Contamination by micro-organisms affects the quality of milk, which can affect the quality of the milk production chain. This study aimed to determine the changes in milk composition and antibiotic susceptibility related to bacteria isolated from dairy cow milk. Materials and Methods Raw milk samples were collected from 72 dairy cows. All milk samples were subjected to the California Mastitis Test (CMT) for CMT score determination. We also investigated milk composition, bacterial culture (BC), and antibiotic susceptibility. Results About 47.22% and 30.56% of dairy cattle were positive for CMT + BC and automatic somatic cell count (ASCC) + BC, respectively. Fecal appearance and animal age were found to be risk factors for ASCC + BC positivity in dairy cattle. Bacteria were found in approximately 76% of milk samples, with the most common isolated species being α-hemolytic Streptococcus spp., coagulase-negative Staphylococcus spp., and Escherichia coli. Of these, 70% are resistant to at least one antibiotic. Variation in the multidrug resistance pattern was high in Klebsiella spp. Conclusions Fecal appearance and animal age are risk factors for ASCC + BC positivity in dairy cattle. This study identified antibiotic and multidrug resistance patterns, which require comprehensive studies and effective surveillance systems. Remarkably, the use of antibiotic therapy in dairy cattle should be monitored.
Collapse
Affiliation(s)
- Supaporn Somrup
- Faculty of Technology and Community Development, Thaksin University, Phatthalung 93210, Thailand
| | - Watcharapong Mitsuwan
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand
- One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Center of Excellence in Innovation of Essential Oils, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Teeraphun Bhumibhamon
- Veterinary Research and Development Center (Upper Southern Region), Nakhon Si Thammarat 80110, Thailand
| | - Maria de Lourdes Pereira
- Department of Medical Sciences, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, Portugal
| | - Alok K. Paul
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, Australia
| | - Veeranoot Nissapatorn
- School of Allied Health Sciences, Southeast Asia Water Team, World Union for Herbal Drug Discovery, and Research Excellence Center for Innovation and Health Products, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Phirabhat Saengsawang
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand
- One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand
| |
Collapse
|
6
|
Coleman ME, Oscar TP, Negley TL, Stephenson MM. Suppression of pathogens in properly refrigerated raw milk. PLoS One 2023; 18:e0289249. [PMID: 38085721 PMCID: PMC10715650 DOI: 10.1371/journal.pone.0289249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 07/13/2023] [Indexed: 12/18/2023] Open
Abstract
Conflicting claims exist regarding pathogen growth in raw milk. A small pilot study was designed to provide definitive data on trends for pathogen growth and decline in raw bovine milk hygienically produced for direct human consumption. An independent laboratory conducted the study, monitoring growth and decline of pathogens inoculated into raw milk. Raw milk samples were inoculated with foodborne pathogens (Campylobacter, E. coli O157:H7, Listeria monocytogenes, or Salmonella) at lower (<162 colony forming units (CFU) per mL) and higher levels (<8,300 CFU/mL). Samples were stored at 4.4°C and quantified over time after inoculation (days 0, 3, 6, 9, 12, and 14) by standard culture-based methods. Statistical analysis of trends using the Mann-Kendall Trend Test and Analysis of Variance were conducted for 48 time series observations. Evidence of pathogen growth was documented for L. monocytogenes in 8 of 12 replicates (P = 0.001 to P = 0.028). Analysis of variance confirmed significant increases for L. monocytogenes at both initial levels in week 2. No evidence of growth was documented over 14 days for the three pathogens predominantly associated with raw milk outbreaks in the US (Campylobacter, E. coli O157:H7, and Salmonella). Further research is needed to characterize parameters for pathogen growth and decline to support re-assessment of risks that were based on incorrect assumptions about interactions of pathogens with the raw milk microbiota.
Collapse
Affiliation(s)
- M. E. Coleman
- Coleman Scientific Consulting, Groton, NY, United States of America
| | - T. P. Oscar
- USDA, Agricultural Research Service, Princess Ann, MD, United States of America
| | - T. L. Negley
- TIG Environmental, Syracuse, NY, United States of America
| | - M. M. Stephenson
- Advancement and External Affairs, Syracuse University, Syracuse, NY, United States of America
| |
Collapse
|
7
|
Widodo A, Lamid M, Effendi MH, Tyasningsih W, Raharjo D, Khairullah AR, Kurniawan SC, Yustinasari LR, Riwu KHP, Silaen OSM. Molecular identification of blaTEM and blaCTX-M genes in multidrug-resistant Escherichia coli found in milk samples from dairy cattle farms in Tulungagung, Indonesia. J Vet Res 2023; 67:381-388. [PMID: 37786843 PMCID: PMC10541667 DOI: 10.2478/jvetres-2023-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 09/13/2023] [Indexed: 10/04/2023] Open
Abstract
Introduction Escherichia coli is an opportunistic bacteria that can grow easily, produce toxins, and resist antibiotics. The phenomenon of E. coli developing multidrug resistance is currently the subject of extensive research. The objective of this study was to molecularly identify blaTEM and blaCTX-M genes in multidrug-resistant E. coli found in milk samples from dairy cattle farms in Tulungagung, Indonesia. Material and Methods One hundred and ten milk samples were collected from 45 dairy cattle farms in Tulungagung, Indonesia. Indole, methyl red, Voges-Proskauer and in citrate tests and triple iron sugar agar tests were used to identify E. coli. Multidrug resistance was determined in isolates through antibiotic sensitivity tests using tetracycline, streptomycin, trimethoprim, chloramphenicol and aztreonam. Extended-spectrum beta lactamase enzyme production was confirmed by double-disc synergy test (DDST). Molecular identification was performed to confirm the blaTEM and blaCTX-M genes. Results One hundred and one (91.82%) E. coli strains were isolated from the samples. The antibiotic sensitivity test showed four (3.96%) multidrug-resistant (MDR) and one (0.99%) ESBL-positive E. coli by DDST confirmation. There were three (77.78%) blaTEM genes and one (0.99%) blaCTX-M gene discovered in the MDR E. coli isolates using PCR for molecular identification. Conclusion The findings of the blaTEM and blaCTX-M genes encoding ESBL E. coli in dairy cattle milk in Tulungagung, Indonesia is concerning and argues for prompt action to stop the emergence of antibiotic resistance which has an impact on public health.
Collapse
Affiliation(s)
- Agus Widodo
- Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
- Department of Health, Faculty of Vocational Studies, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Mirni Lamid
- Department of Animal Husbandry, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Mustofa Helmi Effendi
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Wiwiek Tyasningsih
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Dadik Raharjo
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Aswin Rafif Khairullah
- Department of Animal Husbandry, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Shendy Canadya Kurniawan
- Department of Animal Sciences, Wageningen University and Research, Wageningen6708 PB, Netherlands
| | - Lita Rakhma Yustinasari
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya60115, East Java, Indonesia
| | - Katty Hendriana Priscilia Riwu
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Universitas Mandalika, Mataram83125, Nusa Tenggara Barat, Indonesia
| | | |
Collapse
|
8
|
Adamski P, Byczkowska-Rostkowska Z, Gajewska J, Zakrzewski AJ, Kłębukowska L. Prevalence and Antibiotic Resistance of Bacillus sp. Isolated from Raw Milk. Microorganisms 2023; 11:microorganisms11041065. [PMID: 37110488 PMCID: PMC10143217 DOI: 10.3390/microorganisms11041065] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/24/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
Milk, due to its diversity in terms of its nutritional content, is an important element of the human diet, as well as a good medium for the development of bacteria. The genus Bacillus contains ubiquitous aerobic, rod-shaped, endospore-producing gram-positive bacteria. Representatives of the Bacillus cereus group and the Bacillus subtilis group contribute to shortening the shelf life of milk and dairy products by degrading milk components and its additives. They also produce a number of heat-stable toxins and can cause a number of ailments, mainly in the digestive system. The aim of this research was to identify Bacillus sp. strains isolated from raw milk and to determine their antibiotic resistance. Strains isolated from raw milk samples (n = 45) were identified by MALDI-TOF MS. Ninety strains of Bacillus sp. were identified, for which the antibiotic resistance phenotype was determined. A total of 90 strains of Bacillus were classified in five groups (the Bacillus cereus group (n = 35), B. licheniformis (n = 7), the B. subtilis group (n = 29), B. pumilus (n = 16), and Bacillus sp. (n = 3). All isolates were susceptible to chloramphenicol and meropenem. The antibiotic resistance profiles of the tested groups of Bacillus spp. differed from each other, which is of particular concern in relation to multidrug-resistant representatives of the B. cereus group resistant to cefotaxime (94.29%), ampicillin (88.57%), rifampicin (80%), and norfloxacin (65.71%). Our study provides data on the prevalence and antibiotic sensitivity of Bacillus sp. In raw milk, suggesting a potential risk to health and the dairy industry.
Collapse
Affiliation(s)
- Patryk Adamski
- Department of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| | - Zuzanna Byczkowska-Rostkowska
- Department of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| | - Joanna Gajewska
- Department of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| | - Arkadiusz Józef Zakrzewski
- Department of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| | - Lucyna Kłębukowska
- Department of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| |
Collapse
|
9
|
Zhang S, Hu L, Xue Y, Zhang D, Zhang Y, Wang S. Development of a real-time loop-mediated isothermal amplification method for monitoring Pseudomonas lurida in raw milk throughout the year of pasture. Front Microbiol 2023; 14:1133077. [PMID: 37125188 PMCID: PMC10130427 DOI: 10.3389/fmicb.2023.1133077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/20/2023] [Indexed: 05/02/2023] Open
Abstract
Introduction The psychrophilic bacterium Pseudomonas lurida (P. lurida) and its thermostable alkaline proteases can seriously damage raw milk quality. Methods In this study, specific primers were designed for P. lurida's gyrB and aprX genes, and a real-time loop-mediated isothermal amplification (RealAmp) rapid detection method was developed for the early monitoring of P. lurida and its proteases in raw milk. A phylogenetic tree of the gyrB and aprX genes of P. lurida was constructed to analyze the homology of the design sequence of the RealAmp primer. The DNA of 2 strains of P. lurida and 44 strains of non-P. lurida were detected via RealAmp to analyze the specificity of the primer. Results It was found that aprX-positive proteases were produced by P. lurida-positive strains only when Pseudomonas fluorescens was negative. The dissociation temperatures of gyrB and aprX in the RealAmp-amplified products were approximately 85.0°C and 90.0°C, respectively. Moreover, DNA was detected through a 10-fold dilution of P. lurida in a pure bacterial solution and artificially contaminated skimmed milk. The limit of detection of P. lurida DNA copy number in the pure bacterial solution was 8.6 copies/μL and that in the 10% skimmed milk was 5.5 copies/μL. Further, 144 raw milk samples throughout the year from three farms in Hebei province were analyzed using RealAmp. The highest detection rate of P. lurida was 56% in the first and third quarters, and that of proteases was 36% in the second quarter. The detection rates of P. lurida and its proteases were the highest in samples collected from pasture 2 (52 and 46%, respectively), and the ability of P. lurida to produce proteases reached 88%. Discussion In conclusion, RealAmp established an early and rapid method for the detection of P. lurida and its proteases in raw milk samples, allowing the identification and control of contamination sources in a timely manner to ensure the quality of milk and dairy products.
Collapse
Affiliation(s)
- Shufei Zhang
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Lianxia Hu
- College of Chemical Engineering, Shijiazhuang University, Shijiazhuang, Hebei, China
| | - Yuling Xue
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
| | - Dong Zhang
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
| | - Yaoguang Zhang
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
| | - Shijie Wang
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
- *Correspondence: Shijie Wang,
| |
Collapse
|
10
|
Feliciano RJ, Boué G, Mohssin F, Huseini MM, Membré JM. Raw milk quality in large-scale farms under hot weather conditions: learnings from one-year quality control data. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
11
|
Grape Pomace in Ewes Diet Affects Metagenomic Profile, Volatile Compounds and Biogenic Amines Contents of Ripened Cheese. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8110598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The main objective of this research was to evaluate the development of volatile organic compounds (VOCs) and the accumulation of biogenic amines (BAs) in relation to the dynamic of microbial population composition in fresh and ripened cheese produced from raw milk of ewes fed a diet containing grape pomace (GP+) and fed a standard diet (Ctrl). Genomic DNA was extracted from the cheeses at 2 (T2), 60 (T60), 90 (T90) and 120 (T120) days of ripening and prepared for 16S rRNA-gene sequencing to characterize the cheese microbiota; furthermore, VOCs were determined via solid-phase microextraction combined with gas chromatography-mass spectrometry and biogenic amines by HPLC analyses. Diet did not affect the relative abundance of the main phyla identified, Proteobacteria characterized T2 samples, but the scenario changed during the ripening. At genus level, Pseudomonas, Chryseobacterium and Acinetobacter were the dominant taxa, however, a lower percentage of Pseudomonas was detected in GP+ cheeses. Enterococcus became dominant in ripened cheeses followed in Ctrl cheeses by Lactobacillus and in GP+ cheeses by Lactococcus. The diet affected the development of carboxylic acids and ketones but not of aldehydes. Low levels of esters were identified in all the samples. In total, four biogenic amines were determined in cheeses samples and their levels differed between the two groups and during ripening time. In 60, T90 and T120 GP+ cheeses, a lower amount of 2-phenylethylamine was found compared to Ctrl. Putrescine was detected only in GP+ samples and reached the highest level at 120 days. Conversely, the amount of cadaverine in GP+ samples was invariable during the ripening. The concentration of tyramine in GP+ samples was compared to Ctrl during the ripening. Overall, significant positive correlations between some families of bacteria and the formation of VOCs and BAs were found.
Collapse
|