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Albenzio M, Santillo A, d'Angelo F, di Corcia M, Ciliberti MG, Marino R, Caroprese M, Della Malva A, Sevi A. Milk quality of Italian Mediterranean Buffalo as affected by Temperature-Humidity Index during late spring and summer. J Dairy Sci 2024:S0022-0302(24)00636-2. [PMID: 38554825 DOI: 10.3168/jds.2024-24732] [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: 01/29/2024] [Accepted: 02/22/2024] [Indexed: 04/02/2024]
Abstract
Eighteen Italian Mediterranean buffalo cows were subjected to fortnightly milk sampling from May to July 2022. Air temperature and relative humidity were monitored throughout the trial; temperature-humidity index (THI) was calculated and ranged from 69 to 79 so that 3 classes were set to study the effect of different THI on milk quality: THI less than 72 - THI < 72; THI ranging from 72 to 76 THI72-76, and THI over 76 - THI > 76. Individual milk samples from buffalo cows were analyzed for milk composition and coagulation traits, fatty acid and amino-acid composition, enzymatic and mineral profile. The THI > 76 class registered the highest lactose content and poorer milk clot characteristics in comparison with THI < 72. Exposure to THI over 76 resulted in increased contents of saturated and short- chain fatty acids in milk as well as in the highest values of atherogenic and thrombogenic indexes and the lowest essential amino-acid content. Moreover, the lowest value of Calcium, Copper and Selenium contents were found in the milk of buffalo cows exposed to THI over 72. Results confirm that Italian Mediterranean buffalo expresses a good level of thermo-tolerance, even though exposure to daily THI over 76 has a deleterious effect on some nutritional and technological properties of milk.
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Affiliation(s)
- M Albenzio
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - A Santillo
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy.
| | - F d'Angelo
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - M di Corcia
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - M G Ciliberti
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - R Marino
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - M Caroprese
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - A Della Malva
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
| | - A Sevi
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE). University of Foggia, Via Napoli, 25-71121 Foggia. Italy
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Leite JAS, Montoya CA, Loveday SM, Mullaney JA, Loo TS, McNabb WC, Roy NC. The impact of heating and drying on protease activities of ruminant milk before and after in vitro infant digestion. Food Chem 2023; 429:136979. [PMID: 37506658 DOI: 10.1016/j.foodchem.2023.136979] [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: 01/30/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 07/30/2023]
Abstract
This study investigated the effect of heating (63°C/30 min or 75°C/15 s) and drying (spray-drying or freeze-drying) on plasmin, cathepsin D, and elastase activities in bovine, ovine, and caprine milk, compared to non-dried raw milk counterparts. Protease activities and protein hydrolysis were assessed before and after in vitro infant digestion with or without gastric and pancreatic enzymes. At 75°C/15 s, plasmin activity in caprine and ovine milk decreased (69-75%, p<0.05), while cathepsin D activity in spray-dried bovine milk heated increased (2.8-fold, p<0.05). Plasmin and cathepsin D activities increased (<1.2-fold, p<0.05) after in vitro digestion with pancreatin, regardless of milk species. Endogenous milk enzymes hydrolyzed more proteins than gastric enzymes during gastric digestion and contributed to small intestinal digestion. In summary, milk proteases remained active after processing with effects dependent on the species of milk, and they contributed to in vitro protein hydrolysis in the stomach and small intestine.
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Affiliation(s)
- Juliana A S Leite
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand
| | - Carlos A Montoya
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand; Smart Foods & Bioproducts Innovation Centre of Excellence, AgResearch Limited, Palmerston North 4474, New Zealand
| | - Simon M Loveday
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand; Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research (A*STAR), Singapore 138673, Singapore
| | - Jane A Mullaney
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand; High-Value Nutrition National Science Challenge, Auckland 1010, New Zealand
| | - Trevor S Loo
- School of Natural Sciences, Massey University, Palmerston North 4442, New Zealand
| | - Warren C McNabb
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand; High-Value Nutrition National Science Challenge, Auckland 1010, New Zealand
| | - Nicole C Roy
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand; High-Value Nutrition National Science Challenge, Auckland 1010, New Zealand; Department of Nutrition, University of Otago, Dunedin 9016, New Zealand.
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3
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Karageorgou A, Tsafou M, Goliomytis M, Hager-Theodorides A, Politi K, Simitzis P. Effect of Dietary Supplementation with a Mixture of Natural Antioxidants on Milk Yield, Composition, Oxidation Stability and Udder Health in Dairy Ewes. Antioxidants (Basel) 2023; 12:1571. [PMID: 37627566 PMCID: PMC10451849 DOI: 10.3390/antiox12081571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Due to the limitations in the use of antibiotic agents, researchers are constantly seeking natural bioactive compounds that could benefit udder health status but also milk quality characteristics in dairy animals. The aim of the current study was therefore to examine the effects of a standardized mixture of plant bioactive components (MPBC) originated from thyme, anise and olive on milk yield, composition, oxidative stability and somatic cell count in dairy ewes. Thirty-six ewes approximately 75 days after parturition were randomly allocated into three experimental treatments, which were provided with three diets: control (C); without the addition of the mixture, B1; supplemented with MPBC at 0.05% and B2; supplemented with rumen protected MPBC at 0.025%. The duration of the experiment was 11 weeks, and milk production was weekly recorded, while individual milk samples for the determination of composition, oxidative stability, somatic cell count (SCC), pH and electric conductivity were collected. Every two weeks, macrophage, lymphocyte, and polymorphonuclear leukocyte counts were also determined in individual milk samples. It was observed that milk yield was the greatest in the B2 group, with significant differences within the seventh and ninth week (p < 0.05), whereas no significant differences were found for milk composition, with the exception of the seventh week, when protein, lactose and non-fat solid levels were lower in MPBC groups (p < 0.05). Oxidative stability was improved in the groups that received the MPBC, with significant differences at the third, seventh, tenth and eleventh week (p < 0.05). SCC was also significantly lower at the second, eighth and ninth week in B2 compared to the other groups (p < 0.05), while no significant effects on the macrophage, lymphocyte, and polymorphonuclear leukocyte counts were observed. In conclusion, the MPBC addition had a positive effect on sheep milk yield, oxidative stability and somatic cell count, without any negative effect on its composition.
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Affiliation(s)
| | | | | | | | | | - Panagiotis Simitzis
- Laboratory of Animal Breeding and Husbandry, Department of Animal Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (A.K.); (M.G.); (A.H.-T.); (K.P.)
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Sodhi M, Sharma M, Sharma A, Verma P, Mohanty A, Kataria RS, Shandilya UK, Kumari P, Mukesh M. Expression profile of different classes of proteases in milk derived somatic cells across different lactation stages of indigenous cows ( Bos indicus) and riverine buffaloes ( Bubalus bubalis). Anim Biotechnol 2023; 34:15-24. [PMID: 34187314 DOI: 10.1080/10495398.2021.1930024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Proteases play a significant role in milk and its products by affecting flavor, texture and longevity. The expression of endogenous proteases varies across different stages of lactation. The study was conducted to understand the transcriptional pattern of different classes of protease-pathways associated genes (CTSB, CTSD, CTSH, CTSL, CTSK, CTSS, CTSZ, PLAU, PLAT) and potential protease inhibitors (SERPIN E2 and SERPIN F2) in 40 milk somatic cells (MSC) samples isolated during early, peak, mid and late lactation stages of Sahiwal cows and Murrah buffaloes - the two most important dairy breeds of India. In Sahiwal cows, except CTSK and PLAU, the expression of other proteases class was not affected significantly (p > 0.05) across lactation stages. However, in Murrah buffaloes, the expression of different proteases increased as the lactation progressed. Most of the proteases showed lower expression during early and peak lactation stages while their expression tends to increase during mid to late lactation stages. The overall trend was somewhat similar in both the dairy species albeit the level of expression was higher in buffalo MSC as compared to cow MSC. The study has provided valuable information on expression kinetics of different proteases in milk somatic cells of two major dairy breeds of India.
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Affiliation(s)
- Monika Sodhi
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | - Manjula Sharma
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | - Ankita Sharma
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | - Preeti Verma
- ICAR-National Dairy Research Institute, Karnal, India
| | - Ashok Mohanty
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | - R S Kataria
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | | | - Parvesh Kumari
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
| | - Manishi Mukesh
- ICAR-National Bureau of Animal Genetic Resources, Karnal, India
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5
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Activities of indigenous proteases in cow, buffalo and goat milk of Indian subcontinent and their correlation with somatic cell count. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2022.105567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Matrix metalloproteinase-9 activity in ewes’ milk and its relationship to somatic cell counts. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2022.105438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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High Milk Somatic Cell Counts and Increased Teladorsagia Burdens Overshadow Non-Infection-Related Factors as Predictors of Fat and Protein Content of Bulk-Tank Raw Milk in Sheep and Goat Farms. Foods 2022; 11:foods11030443. [PMID: 35159593 PMCID: PMC8834117 DOI: 10.3390/foods11030443] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/28/2022] [Accepted: 01/30/2022] [Indexed: 11/29/2022] Open
Abstract
This paper presents the results of an extensive countrywide investigation performed in 325 dairy sheep flocks and 119 goat herds throughout Greece. The objectives of the study were (a) to investigate fat and protein content in the bulk-tank raw milk of small ruminant farms in Greece and (b) to identify factors potentially influencing that content and factors that can contribute to increased content. The mean fat/protein contents in bulk-tank raw milk of sheep and goats were 6.16 ± 0.05%/4.43 ± 0.01% and 4.77 ± 0.44%/3.23 ± 0.30%, respectively. Significant differences were seen in protein content between farms in the various parts of the country. For sheep, multivariable analyses revealed breed and age of lamb removal from dams as significant for fat content, and somatic cell counts, management system in the farm, administration of anthelmintic treatment during the last stage of pregnancy, and farmer education as significant for protein content. For goats, significant factors were month into lactation period, age of kid removal from dams, and breed for fat content, and somatic cell counts, month into lactation, grazing duration, and % Teladorsagia larvae in faecal samples for protein content. For concurrently high fat and protein content, in multivariable analyses, the following emerged as significant factors: somatic cell counts in milk, numbers of parasite eggs in faeces, and veterinary collaboration (sheep), and month into lactation and somatic cell counts in milk (goats). The results indicate that high somatic cell counts in milk (reflecting the presence of mastitis) and gastrointestinal parasitic infections (mainly Teladorsagia infection) appear to exert a more significant influence on fat and protein content of milk, in comparison to non-infection-related factors.
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8
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Robinson RC, Nielsen SD, Dallas DC, Barile D. Can cheese mites, maggots and molds enhance bioactivity? Peptidomic investigation of functional peptides in four traditional cheeses. Food Funct 2021; 12:633-645. [PMID: 33346308 DOI: 10.1039/d0fo02439b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Aside from their amino acid content, dairy proteins are valuable for their ability to carry encrypted bioactive peptides whose activities are latent until released by digestive enzymes or endogenous enzymes within the food. Peptides can possess a wide variety of functionalities, such as antibacterial, antihypertensive, and antioxidative properties, as demonstrated by in vitro and in vivo studies. This phenomenon raises the question as to what impact various traditional cheese-making processes have on the formation of bioactive peptides in the resulting products. In this study, we have profiled the naturally-occurring peptides in two hard and two soft traditional cheeses and have identified their known bioactive sequences. While past studies have typically identified fewer than 100 peptide sequences in a single cheese, we have used modern instrumentation to identify between 2900 and 4700 sequences per cheese, an increase by a factor of about 50. We demonstrated substantial variations in proteolysis and peptide formation between the interior and rind of each cheese, which we ascribed to the differences in microbial composition between these regions. We identified a total of 111 bioactive sequences among the four cheeses, with the greatest number of sequences, 89, originating from Mimolette. The most common bioactivities identified were antimicrobial and inhibition of the angiotensin-converting enzyme. This work revealed that cheese proteolysis and the resulting peptidomes are more complex than originally thought in terms of the number of peptides released, variation in peptidome across sites within a single cheese, and variation in bioactive peptides among cheese-making techniques.
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Affiliation(s)
- Randall C Robinson
- Department of Food Science and Technology, University of California at Davis, One Shields Avenue, Davis, California 95616, USA.
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9
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Matuozzo M, Spagnuolo MS, Hussein HA, Gomaa AM, Scaloni A, D’Ambrosio C. Novel Biomarkers of Mastitis in Goat Milk Revealed by MALDI-TOF-MS-Based Peptide Profiling. BIOLOGY 2020; 9:biology9080193. [PMID: 32731427 PMCID: PMC7464427 DOI: 10.3390/biology9080193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/22/2020] [Accepted: 07/22/2020] [Indexed: 11/16/2022]
Abstract
Mastitis is the most common infection of dairy goats impairing milk production and quality, which is usually recognized by mammary gland visual inspection and palpation. Subclinical forms of the disease are also widely represented, which lack the typical signs of the clinical ones but are still associated with reduced production and safety for human consumption of milk, generally presenting a high bacterial count. In order to obtain novel analytical tools for rapid and non-invasive diagnosis of mastitis in goats, we analyzed milk samples from healthy, subclinical and clinical mastitic animals with a MALDI-TOF-MS-based peptidomic platform, generating disease group-specific spectral profiles whose signal intensity and mass values were analyzed by statistics. Peculiar spectral signatures of mastitis with respect to the control were identified, while no significant spectral differences were observed between clinical and subclinical milk samples. Discriminant signals were assigned to specific peptides through nanoLC-ESI-Q-Orbitrap-MS/MS experiments. Some of these molecules were predicted to have an antimicrobial activity based on their strong similarity with homolog bioactive compounds from other mammals. Through the definition of a panel of peptide biomarkers, this study provides a very rapid and low-cost method to routinely detect mastitic milk samples even though no evident clinical signs in the mammary gland are observed.
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Affiliation(s)
- Monica Matuozzo
- Institute for the Animal Production System in the Mediterranean Environment (ISPAAM), National Research Council (CNR), 80147 Naples, Italy; (M.M.); (M.S.S.); (A.S.)
| | - Maria Stefania Spagnuolo
- Institute for the Animal Production System in the Mediterranean Environment (ISPAAM), National Research Council (CNR), 80147 Naples, Italy; (M.M.); (M.S.S.); (A.S.)
| | - Hany A. Hussein
- Department of Animal Reproduction and Artificial Insemination, National Research Centre, Giza 12622, Egypt;
- Department of Veterinary Research, Guangdong Haid Institute of Animal Husbandry and Veterinary (GHIAHV), Guangzhou 511400, China
| | - A. M. Gomaa
- Animal Reproduction Research Institute (ARRI), Agriculture Research Center, Ministry of Agriculture, Giza 12556, Egypt;
| | - Andrea Scaloni
- Institute for the Animal Production System in the Mediterranean Environment (ISPAAM), National Research Council (CNR), 80147 Naples, Italy; (M.M.); (M.S.S.); (A.S.)
| | - Chiara D’Ambrosio
- Institute for the Animal Production System in the Mediterranean Environment (ISPAAM), National Research Council (CNR), 80147 Naples, Italy; (M.M.); (M.S.S.); (A.S.)
- Correspondence:
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10
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Farhadian M, Rafat SA, Panahi B, Ebrahimie E. Transcriptome signature of two lactation stages in Ghezel sheep identifies using RNA-Sequencing. Anim Biotechnol 2020; 33:223-233. [PMID: 32633600 DOI: 10.1080/10495398.2020.1784185] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The expression of genes and their regulation during lactation in Ghezel sheep breed remains less understood. To explore the underlying molecular mechanism of the lactation process in the mammary gland, transcriptome profiles of Iranian fat-tailed Ghezel sheep breed milk at two stages, before (BF) and after peak (AF) stages of lactation were investigated. Functional impacts of differentially expressed genes (DEGs) between BF and AF stages were surveyed using Gene Ontology (GO) and Protein-Protein Interaction (PPI) network analysis. Totally, 75 DEGs were identified between BF and AF stages of lactation. The RNA-Seq results were validated by Q-RT-PCR. Gene ontology of DEGs mainly enriched in metabolic process and oxidative phosphorylation. PPI network analysis also highlighted the contribution of peroxisome proliferator-activated receptors (PPAR) signaling, oxidative phosphorylation and metabolic pathways in the lactation process. Intriguingly, the genes involved in fat metabolism dominantly down-regulated at AF stage. Our results provide new insight into transcriptional changes and add to growing body of knowledge on the lactation process in fat-tailed sheep breeds.
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Affiliation(s)
- Mohammad Farhadian
- Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Seyed Aabbas Rafat
- Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
| | - Bahman Panahi
- Department of Genomics, Branch for Northwest and West Region, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Tabriz, Iran
| | - Esmaeil Ebrahimie
- Genomics Research Platform, School of Life Sciences, La Trobe University, Melbourne, Victoria, Australia.,School of Animal and Veterinary Sciences, The University of Adelaide, South Australia, Australia
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Stocco G, Summer A, Cipolat-Gotet C, Zanini L, Vairani D, Dadousis C, Zecconi A. Differential Somatic Cell Count as a Novel Indicator of Milk Quality in Dairy Cows. Animals (Basel) 2020; 10:E753. [PMID: 32357407 PMCID: PMC7277798 DOI: 10.3390/ani10050753] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 12/21/2022] Open
Abstract
Recent available instruments allow to record the number of differential somatic cell count (DSCC), representing the combined proportion of polymorphonuclear leukocytes and lymphocytes, on a large number of milk samples. Milk DSCC provides indirect information on the udder health status of dairy cows. However, literature is limited regarding the effect of DSCC on milk composition at the individual cow level, as well as its relation to the somatic cell score (SCS). Hence, the aims of this study were to (i) investigate the effect of different levels of DSCC on milk composition (fat, protein, casein, casein index, and lactose) and (ii) explore the combined effect of DSCC and SCS on these traits. Statistical models included the fixed effects of days in milk, parity, SCS, DSCC and the interaction between SCS × DSCC, and the random effects of herd, animal within parity, and repeated measurements within cow. Results evidenced a decrease of milk fat and an increase in milk fatty acids at increasing DSCC levels, while protein, casein and their proportion showed their lowest values at the highest DSCC. A positive association was found between DSCC and lactose. The interaction between SCS and DSCC was important for lactose and casein index, as they varied differently upon high and low SCS and according to DSCC levels.
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Affiliation(s)
- Giorgia Stocco
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (G.S.); (A.S.); (C.D.)
| | - Andrea Summer
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (G.S.); (A.S.); (C.D.)
| | - Claudio Cipolat-Gotet
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (G.S.); (A.S.); (C.D.)
| | - Lucio Zanini
- Associazione Regionale Allevatori Lombardia, Via Kennedy 30, 26013 Crema, Italy; (L.Z.); (D.V.)
| | - Diego Vairani
- Associazione Regionale Allevatori Lombardia, Via Kennedy 30, 26013 Crema, Italy; (L.Z.); (D.V.)
| | - Christos Dadousis
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126 Parma, Italy; (G.S.); (A.S.); (C.D.)
| | - Alfonso Zecconi
- Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Celoria 10, 20133 Milano, Italy;
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Martí-De Olives A, Peris C, Molina MP. Effect of subclinical mastitis on the yield and cheese-making properties of ewe’s milk. Small Rumin Res 2020. [DOI: 10.1016/j.smallrumres.2019.106044] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Taherian AR, Lacasse P, Bisakowski B, Lanctôt S, Fustier P. A comparative study on the rheological and thermogelling properties of chitosan/polyvinyl alcohol blends in dairy products. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Albenzio M, Figliola L, Caroprese M, Marino R, Sevi A, Santillo A. Somatic cell count in sheep milk. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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A two-step immunomagnetic separation of somatic cell subpopulations for a gene expression profile study in bovine milk. J DAIRY RES 2018; 85:281-287. [PMID: 30088456 DOI: 10.1017/s002202991800050x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The objective of this study was to demonstrate the usefulness of an immunomagnetic method to purify subpopulations of milk somatic cells. The experiment was conducted on milk samples collected from healthy cows (n = 17) and from cows with clinical mastitis (n = 24) due to a Staphylococcus aureus natural infection. A two-step immunomagnetic purification was applied to simultaneously separate three somatic cell subpopulations from the same milk sample. Total RNA was extracted and qPCR was performed to determinate mRNA levels of innate immunity target genes in purified somatic cell subpopulations. Good quality and quantity of RNA allowed the reference gene analysis in each cell subpopulation. An up-regulation of the main genes involved in innate immune defence was detected in separated polymorphonuclear neutrophilic leucocytes-monocytes and lymphocytes of mastitic milk. These results and flow cytometric analysis suggest that the immunomagnetic purification is an efficient method for the isolation of the three populations from milk, allowing the cells to be studied separately.
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16
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Abstract
The objective of the research described in this Research Communication was to describe potential associations of subclinical mastitis with sheep breeds in Greece. A countrywide survey (2198 ewes in 111 farms) was performed. Prevalence of subclinical mastitis was 0·260. Results did not indicate any difference in the prevalence of subclinical mastitis between farms with pure-bred and farms with cross-bred animals, nor any difference in prevalence between farms with Greek pure-bred animals and farms with imported pure-bred animals. Results indicated that prevalence of subclinical mastitis was smaller in farms with Assaf-breed (0·100) and higher in farms with Frisarta-breed (0·625) (P < 0·02). Prevalence of mastitis was smaller in farms with Greek traditional indigenous breeds (0·221) (P = 0·007). In a model that included sheep breed and management system in farm, breed emerged as a significant factor for prevalence of subclinical mastitis (P = 0·003).
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17
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Caballero-Villalobos J, Perea J, Angón E, Arias R, Garzón A. Coagulation efficiency and its determinant factors: A case study for Manchega ewe milk in the region of Castilla-La Mancha, Spain. J Dairy Sci 2018; 101:3878-3886. [DOI: 10.3168/jds.2017-13816] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 01/14/2018] [Indexed: 11/19/2022]
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18
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Caballero-Villalobos J, Garzón A, Martínez Marín A, Arias R, Ciocia F, McSweeney P. Plasmin activity in Manchega ewe milk: The effect of lactation, parity and health of the udder, and its influence on milk composition and rennet coagulation. Small Rumin Res 2018. [DOI: 10.1016/j.smallrumres.2017.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Becheva Z, Gabrovska K, Godjevargova T. Immunofluorescence microscope assay of neutrophils and somatic cells in bovine milk. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1332012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Zlatina Becheva
- Department of Biotechnology, University “Prof. Dr Asen Zlatarov”, Bourgas, Bulgaria
| | - Katya Gabrovska
- Department of Biotechnology, University “Prof. Dr Asen Zlatarov”, Bourgas, Bulgaria
| | - Tzonka Godjevargova
- Department of Biotechnology, University “Prof. Dr Asen Zlatarov”, Bourgas, Bulgaria
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Li N, Richoux R, Leconte N, Bevilacqua C, Maillard MB, Parayre S, Aubert-Frogerais L, Warlouzel J, Moya-Leclair E, Denis C, Martin P, Gagnaire V. Somatic cell recovery by microfiltration technologies: A novel strategy to study the actual impact of somatic cells on cheese matrix. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2016.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ciliberti M, Albenzio M, Annicchiarico G, Marino R, Santillo A, Sevi A, Caroprese M. Role of different sources of dietary PUFA supplementation on sheep welfare under high ambient temperature. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2015.12.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Albenzio M, Santillo A, Kelly AL, Caroprese M, Marino R, Sevi A. Activities of indigenous proteolytic enzymes in caprine milk of different somatic cell counts. J Dairy Sci 2015; 98:7587-94. [PMID: 26342976 DOI: 10.3168/jds.2015-9762] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 07/14/2015] [Indexed: 11/19/2022]
Abstract
Individual caprine milk with different somatic cell counts (SCC) were studied with the aim of investigating the percentage distribution of leukocyte cell types and the activities of indigenous proteolytic enzymes; proteolysis of casein was also studied in relation to cell type following recovery from milk. The experiment was conducted on 5 intensively managed dairy flocks of Garganica goats; on the basis of SCC, the experimental groups were denoted low (L-SCC; <700,000 cells/mL), medium (M-SCC; from 701,000 to 1,500,000 cells/mL), and high (H-SCC; >1,501,000 cells/mL) SCC. Leukocyte distribution differed between groups; polymorphonuclear neutrophilic leukocytes were higher in M-SCC and H-SCC milk samples, the percentage macrophages was the highest in H-SCC, and levels of nonviable cells significantly decreased with increasing SCC. Activities of all the main proteolytic enzymes were affected by SCC; plasmin activity was the highest in H-SCC milk and the lowest in L-SCC, and elastase and cathepsin D activities were the highest in M-SCC. Somatic cell count influenced casein hydrolysis patterns, with less intact α- and β-casein in H-SCC milk. Higher levels of low electrophoretic mobility peptides were detected in sodium caseinate incubated with leukocytes isolated from L-SCC milk, independent of cell type, whereas among cells recovered from M-SCC milk, macrophages yielded the highest levels of low electrophoretic mobility peptides from sodium caseinate. The level of high electrophoretic mobility peptides was higher in sodium caseinate incubated with polymorphonuclear neutrophilic leukocytes and macrophages isolated from M-SCC, whereas the same fraction of peptides was always the highest, independent of leukocyte type, for cells recovered from H-SCC milk. In caprine milk, a level of 700,000 cells/mL represented the threshold for changes in leukocyte distribution, which is presumably related to the immune status of the mammary gland. Differences in the profile of indigenous lysosomal proteolytic enzymes in caprine milk may influence the integrity of casein based on proteolysis patterns of sodium caseinate incubated with isolated and lysed leukocyte types.
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Affiliation(s)
- M Albenzio
- Department of the Sciences of Agriculture, Food and Environment (SAFE), University of Foggia, Via Napoli, 25, 71100 Foggia, Italy.
| | - A Santillo
- Department of the Sciences of Agriculture, Food and Environment (SAFE), University of Foggia, Via Napoli, 25, 71100 Foggia, Italy
| | - A L Kelly
- School of Food and Nutritional Sciences, University College, Cork, Ireland
| | - M Caroprese
- Department of the Sciences of Agriculture, Food and Environment (SAFE), University of Foggia, Via Napoli, 25, 71100 Foggia, Italy
| | - R Marino
- Department of the Sciences of Agriculture, Food and Environment (SAFE), University of Foggia, Via Napoli, 25, 71100 Foggia, Italy
| | - A Sevi
- Department of the Sciences of Agriculture, Food and Environment (SAFE), University of Foggia, Via Napoli, 25, 71100 Foggia, Italy
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Composition, proteolysis indices and coagulating properties of ewe milk as affected by bulk tank somatic cell count. J DAIRY RES 2015; 82:344-9. [PMID: 26104824 DOI: 10.1017/s0022029915000394] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The aim of this study was to assess the effect of ovine bulk tank somatic cell count (BTSCC) on composition, proteose-peptone (p-p) content and casein fractions as indicating parameters for proteolysis and coagulating properties of milk. A total of 97 samples of bulk tank milk from Manchega breed ewe flocks were grouped according to somatic cell count (SCC) into four classes: fewer than 500,000 cells/ml, from 500,000 to 10,00000 cells/ml, from 10,00000 to 15,00000 and more than 15,00000 cells/ml. The casein : protein ratio and lactose content decreased with BTSCC. Proteolysis increased with BTSCC, causing a drop in β-casein and an increase in the γ-caseins from a concentration of 500,000 cells/ml. Regarding coagulation behaviour, the rennet clotting time (RCT) and firming time (k20) rose from 10,00000-15,00000 cells/ml of milk. The results showed that the impairment of milk quality and milk ability to make cheese as affected by intramammary infection (IMI) can be inferred from the bulk tank milk of flocks with poor udder health.
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Riggio V, Portolano B. Genetic selection for reduced somatic cell counts in sheep milk: A review. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Koutsouli P, Patounas G, Massouras T, Bizelis I, Politis I. Plasmin–plasminogen system and milk coagulation properties of two Greek dairy sheep breeds. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.01.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Li N, Richoux R, Boutinaud M, Martin P, Gagnaire V. Role of somatic cells on dairy processes and products: a review. DAIRY SCIENCE & TECHNOLOGY 2014; 94:517-538. [PMID: 25309683 PMCID: PMC4180028 DOI: 10.1007/s13594-014-0176-3] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 05/28/2014] [Accepted: 06/16/2014] [Indexed: 01/25/2023]
Abstract
Somatic cells are an important component naturally present in milk, and somatic cell count is used as an indicator of udder health and milk quality. The role of somatic cells in dairy processes and products is ill-defined in most studies because the role of these cells combines also the concomitance of physicochemical modifications of milk, bacterial count, and the udder inflammation in the presence of high somatic cell count. The aim of this review is to focus on the role of somatic cells themselves and of endogenous enzymes from somatic cells in milk, in dairy transformation processes, and in characteristics of final products overcoming biases due to other factors. The immune function of somatic cells in the udder defense and their protective role in milk will be primarily considered. Different characteristics of milk induced by various somatic cell counts, types, and their endogenous enzymes influencing directly the technological properties of milk and the final quality of dairy products will be discussed as well. By comparing methods used in other studies and eliminating biases due to other factors not considered in these studies, a new approach has been suggested to evaluate the effective role of somatic cells on dairy processes and products. In addition, this new approach allows the characterization of somatic cells and their endogenous enzymes and, in future research, will allow the clarification of mechanisms involved in the release of these components from somatic cells during dairy processes, particularly in cheese technologies.
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Affiliation(s)
- N Li
- INRA, UMR 1253, Science et Technologie du Lait et de l'Œuf, 65 rue de Saint Brieuc, F-35042 Rennes, France ; Agrocampus Ouest, UMR 1253, Science et Technologie du Lait et de l'Œuf, 65 rue de Saint Brieuc, 35042 Rennes, France ; Actalia, BP 50915, 35009 Rennes, Cedex France
| | - R Richoux
- Actalia, BP 50915, 35009 Rennes, Cedex France
| | - M Boutinaud
- INRA, UMR 1348, Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Élevage, 35590 Saint Gilles, France ; Agrocampus Ouest, UMR 1348, Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Élevage, 35590 Saint Gilles, France
| | - P Martin
- INRA, UMR 1313, Génétique Animale et Biologie Intégrative, 78350 Jouy-en-Josas, France ; AgroParisTech, UMR 1313, Génétique Animale et Biologie Intégrative, 78350 Jouy-en-Josas, France
| | - V Gagnaire
- INRA, UMR 1253, Science et Technologie du Lait et de l'Œuf, 65 rue de Saint Brieuc, F-35042 Rennes, France ; Agrocampus Ouest, UMR 1253, Science et Technologie du Lait et de l'Œuf, 65 rue de Saint Brieuc, 35042 Rennes, France
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The quality of Valle del Belice sheep’s milk and cheese produced in the hot summer season in Sicily. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13594-013-0155-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Le Gars M, Descamps D, Roussel D, Saussereau E, Guillot L, Ruffin M, Tabary O, Hong SS, Boulanger P, Paulais M, Malleret L, Belaaouaj A, Edelman A, Huerre M, Chignard M, Sallenave JM. Neutrophil Elastase Degrades Cystic Fibrosis Transmembrane Conductance Regulator via Calpains and Disables Channel FunctionIn VitroandIn Vivo. Am J Respir Crit Care Med 2013; 187:170-9. [DOI: 10.1164/rccm.201205-0875oc] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Albenzio M, Santillo A, Caroprese M, Ruggieri D, Ciliberti M, Sevi A. Immune competence of the mammary gland as affected by somatic cell and pathogenic bacteria in ewes with subclinical mastitis. J Dairy Sci 2012; 95:3877-87. [PMID: 22720942 DOI: 10.3168/jds.2012-5357] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 03/01/2012] [Indexed: 02/03/2023]
Abstract
Immune competence of the ewe mammary gland was investigated by monitoring the leukocyte differential count, cytokine pattern, and endogenous proteolytic enzymes in milk samples with different somatic cell counts (SCC) and pathogenic bacteria. Furthermore, the leukocyte differential count and T-lymphocyte populations were evaluated in ewe blood. A total of 1,500 individual milk samples were randomly selected from the pool of the samples collected during sampling and grouped into 5 classes of 300 samples each, on the basis of SCC. Classes were <300,000 cells/mL, from 300,000 to 500,000 cells/mL, from 501,000 to 1,000,000 cells/mL, from 1,001,000 to 2,000,000 cells/mL, and >2,000,000 cells/mL. Microbiological analyses of ewe milk were conducted to detect mastitis-related pathogens. Sheep whose udders were without clinical abnormalities, and whose milk was apparently normal but with at least 10(3)cfu/mL of the same pathogen were considered to have subclinical mastitis and therefore defined as infected. Polymorphonuclear neutrophilic leukocytes (PMNL) and macrophages increased with SCC, whereas lymphocytes decreased. Milk samples with SCC >1,000,000 cells/mL showed differences in leukocyte populations between uninfected and infected ewes, with higher percentages of PMNL and macrophages and lower percentages of lymphocytes in infected animals. Nonviable PMNL levels were the highest in ewe milk samples with SCC <300,000 cells/mL; starting from SCC >500,000 cells/mL, nonviable PMNL were higher in uninfected ewes than in infected ones. In infected animals giving milk with SCC >1,000,000 cells/mL, a higher CD4(+)/CD8(+) ratio was observed, suggesting that the presence of pathogens induced an activation of both CD4(+) and CD8(+). The levels of tumor necrosis factor-α and IL-12 were higher in infected than uninfected ewes, irrespective of SCC. Plasmin activity increased along with SCC and was always higher in infected than uninfected animals; cathepsin D increased starting from 1,001,000 cells/mL in milk samples from noninfected ewes and starting from 301,000 cells/mL in milk samples from infected animals. The associations between somatic cells, cytokines, endogenous proteolytic enzymes, and pathogenic bacteria can be used to better understand the pathogenesis of subclinical mastitis in ewes and the effect on the immune response of ewe mammary gland.
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Affiliation(s)
- M Albenzio
- Department of Production and Innovation in Mediterranean Agriculture and Food Systems, University of Foggia, Via Napoli, 25, 71100 Foggia, Italy.
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Souza F, Blagitz M, Penna C, Della Libera A, Heinemann M, Cerqueira M. Somatic cell count in small ruminants: Friend or foe? Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2012.04.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Martí-De Olives A, Le Roux Y, Rubert-Alemán J, Peris C, Molina M. Short communication: Effect of subclinical mastitis on proteolysis in ovine milk. J Dairy Sci 2011; 94:5369-74. [DOI: 10.3168/jds.2011-4269] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Accepted: 07/25/2011] [Indexed: 11/19/2022]
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Albenzio M, Santillo A. Biochemical characteristics of ewe and goat milk: Effect on the quality of dairy products. Small Rumin Res 2011. [DOI: 10.1016/j.smallrumres.2011.09.023] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Composition, indigenous proteolytic enzymes and coagulating behaviour of ewe milk as affected by somatic cell count. J DAIRY RES 2011; 78:442-7. [DOI: 10.1017/s0022029911000525] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study was undertaken to assess the effect of somatic cell count in ewe milk on i) composition and hygienic traits; ii) plasmin, cathepsin and elastase activities; iii) leukocyte differential count; iv) renneting parameters. Individual ewe milk samples were grouped according to somatic cell count (SCC) into five classes: SC300 (<300 000 cells/ml), SC500 (from 301 000 to 500 000 cells/ml), SC1000 (from 501 000 to 1 000 000 cells/ml), SC2000 (from 1 001 000 to 2 000 000 cells/ml) and SC>2000 (>2 001 000 cells/ml). Individual milk samples were analysed for pH, chemical composition, microbial features, indigenous proteolytic enzymes, differential leukocyte population, and renneting parameters. Milk yield, lactose, protein, non casein nitrogen, microbial features were affected by SCC level. Plasmin and elastase activities were the highest in samples with more than 1 000 000 cells/ml; plasmin had intermediate values in samples with 300 000 to 1 000 000 cells/ml and the lowest in samples with less than 300 000 cells/ml of milk. Cathepsin D showed significantly lower values in SC300 and SC1000 classes than in SC500, SC2000 and SC>2000 classes. The highest percentages of lymphocyte were found in samples with less than 1 000 000 cells/ml, while the highest levels of polymorphonuclear leukocyte were found in samples with more than 1 000 000 cells/ml of milk. Longer clotting time was found in SC>2000 samples, while reduced clot firmness was observed in SC500 and SC>2000 samples. Results on milk yield and on compositional parameters evidenced an impairment of udder efficiency in ewe milk samples starting from 300 000 cells/ml. Plasmin activity in milk can be considered as a marker of the synthetic and secreting ability of the mammary gland; furthermore plasmin and elastase were consistent with the health status of the udder. Finally cathepsin D played a role in the worsening of renneting properties of ewe milk.
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Abstract
This study was undertaken to compare flow cytometry (FC) and direct microscopic leucocyte count (MDLC) for the differentiation of macrophages, lymphocytes and polymorphonuclear leucocyte (PMN) and to evaluate leucocyte distribution in ewe milk with low and high somatic cell count (SCC). Milk samples were grouped for somatic cell count in low SCC (LSCC) when the content was lower than 5·00 × 10(5)/ml and high SCC (HSCC) when the content was higher than 1·00 × 10(6)/ml. No differences were found between the two methods tested suggesting that FC could be used as a routine test for rapid discrimination of leucocytes. Percentages of lymphocytes in ewe milk were higher in LSCC (50%) than in HSCC (39%) and count ranged from 273·91 ± 56·62 × 10(3) cells/ml (LSCC) to 308·90 ± 46·15 × 10(3) cells/ml (HSCC). PMN number was lower in LSCC than in HSCC (248·83 ± 46·87 × 10(3) cells/ml v. 444·38 ± 58·62 × 10(3) cells/ml); accordingly the percentage was lower in LSCC (40%) than in HSCC (57%). No differences were found for macrophages which were 36·36 ± 5·51 × 10(3) cells/ml and 39·32 ± 6·83 × 10(3) cells/ml in LSCC and HSCC, respectively. Lymphocytes in ewe milk did not vary with increased number of somatic cells and were the predominant cell type in LSCC. PMN represented the main population detected in HSCC and the correlation with SCC evidenced that this leucocyte class could be useful in differentiating ewe milk cell count, being strictly responsible for the SCC increase.
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Albenzio M, Santillo A, Caroprese M, Marino R, Trani A, Faccia M. Biochemical patterns in ovine cheese: influence of probiotic strains. J Dairy Sci 2010; 93:3487-96. [PMID: 20655416 DOI: 10.3168/jds.2009-3036] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2009] [Accepted: 04/21/2010] [Indexed: 11/19/2022]
Abstract
This study was undertaken to evaluate the effect of lamb rennet paste containing probiotic strains on proteolysis, lipolysis, and glycolysis of ovine cheese manufactured with starter cultures. Cheeses included control cheese made with rennet paste, cheese made with rennet paste containing Lactobacillus acidophilus culture (LA-5), and cheese made with rennet paste containing a mix of Bifidobacterium lactis (BB-12) and Bifidobacterium longum (BB-46). Cheeses were sampled at 1, 7, 15, and 30 d of ripening. Starter cultures coupled with probiotics strains contained in rennet paste affected the acidification and coagulation phases leading to the lowest pH in curd and cheese containing probiotics during ripening. As consequence, maturing cheese profiles were different among cheese treatments. Cheeses produced using rennet paste containing probiotics displayed higher percentages of alpha(S1)-I-casein fraction than traditional cheese up to 15 d of ripening. This result could be an outcome of the greater hydrolysis of alpha-casein fraction, attributed to higher activity of the residual chymosin. Further evidence for this trend is available in chromatograms of water-soluble nitrogen fractions, which indicated a more complex profile in cheeses made using lamb paste containing probiotics versus traditional cheese. Differences can be observed for the peaks eluted in the highly hydrophobic zone being higher in cheeses containing probiotics. The proteolytic activity of probiotic bacteria led to increased accumulation of free amino acids. Their concentrations in cheese made with rennet paste containing Lb. acidophilus culture and cheese made with rennet paste containing a mix of B. lactis and B. longum were approximately 2.5 and 3.0 times higher, respectively, than in traditional cheese. Principal component analysis showed a more intense lipolysis in terms of both free fatty acids and conjugated linoleic acid content in probiotic cheeses; in particular, the lipolytic pattern of cheeses containing Lb. acidophilus is distinguished from the other cheeses on the basis of highest content of health-promoting molecules. The metabolic activity of the cheese microflora was also monitored by measuring acetic, lactic, and citric acids during cheese ripening. Cheese acceptability was expressed for color, smell, taste, and texture perceived during cheese consumption. Use of probiotics in trial cheeses did not adversely affect preference or acceptability; in fact, panelists scored probiotic cheeses higher in preference over traditional cheese, albeit not significantly.
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Affiliation(s)
- M Albenzio
- Department of Production Sciences, Engineering, and Economics for Agricultural Systems PrIME, University of Foggia, Foggia 71100, Italy.
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