The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis
ABSTRACT: Mastitis is one of the most common diseases in dairy cattle. It significantly reduces milk quality and yield, thus incurring economic losses for farmers. This study investigates the impact of various bacterial pathogens on the SCC, milk composition, and technological properties of milk sam...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Journal of Dairy Science |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022030224012852 |
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| author | Magdalena Zalewska Paulina Brzozowska Magdalena Rzewuska Ewelina Kawecka-Grochocka Daria M. Urbańska Tomasz Sakowski Emilia Bagnicka |
| author_facet | Magdalena Zalewska Paulina Brzozowska Magdalena Rzewuska Ewelina Kawecka-Grochocka Daria M. Urbańska Tomasz Sakowski Emilia Bagnicka |
| author_sort | Magdalena Zalewska |
| collection | DOAJ |
| description | ABSTRACT: Mastitis is one of the most common diseases in dairy cattle. It significantly reduces milk quality and yield, thus incurring economic losses for farmers. This study investigates the impact of various bacterial pathogens on the SCC, milk composition, and technological properties of milk samples from 302 clinically healthy Polish Holstein-Friesian cows kept under intensive rearing conditions. Of the 462 milk samples analyzed, 85.06% were contaminated with bacteria. The majority were coagulase-negative staphylococci (52.60%). Escherichia coli, Streptococcus dysgalactiae, and Streptococcus uberis, (Group 4) and Staphylococcus aureus and Streptococcus agalactiae (Group 5), collectively considered major pathogens, were identified in 16.66% of samples; their presence was associated with higher SCC levels. Additionally, contamination with Staph. aureus or Strep. agalactiae had prolonged clotting time, adversely affected curd and whey quality, with curd yield remaining unaltered. Bacterial contamination did not appear to significantly affect the yield of milk or its main components, namely protein, casein, lactose, fat, TS, solid nonfat, free fatty acid, or citric acid. Although pH, freezing point depression (FPD), and acidity also remained unaffected by bacterial contamination, they were significantly influenced by herd-year-season of calving and herd-year-time of sampling interaction effects. The results indicate that the presence of bacteria causing subclinical mastitis negatively influences milk processing potential. However, fixed linear regression indicated that the number of colony-forming units (cfu/mL) only had a significant influence on FPD and clotting time, and as such, the number of bacteria in a sample did not influence milk yield or quality during subclinical chronic mastitis. |
| format | Article |
| id | doaj-art-f253e88680804daaba20878847d82c14 |
| institution | Kabale University |
| issn | 0022-0302 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dairy Science |
| spelling | doaj-art-f253e88680804daaba20878847d82c142025-01-23T05:25:15ZengElsevierJournal of Dairy Science0022-03022025-02-01108212851300The quality and technological parameters of milk obtained from dairy cows with subclinical mastitisMagdalena Zalewska0Paulina Brzozowska1Magdalena Rzewuska2Ewelina Kawecka-Grochocka3Daria M. Urbańska4Tomasz Sakowski5Emilia Bagnicka6Department of Bacterial Physiology, Institute of Microbiology, Faculty of Biology, University of Warsaw, 02-096 Warsaw, Poland; Corresponding authorsDepartment of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology Polish Academy of Sciences, 05-552 Jastrzębiec, PolandDepartment of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences SGGW, 02-787, Warsaw, PolandDepartment of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology Polish Academy of Sciences, 05-552 Jastrzębiec, PolandDepartment of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology Polish Academy of Sciences, 05-552 Jastrzębiec, PolandDepartment of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology Polish Academy of Sciences, 05-552 Jastrzębiec, PolandDepartment of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; Corresponding authorsABSTRACT: Mastitis is one of the most common diseases in dairy cattle. It significantly reduces milk quality and yield, thus incurring economic losses for farmers. This study investigates the impact of various bacterial pathogens on the SCC, milk composition, and technological properties of milk samples from 302 clinically healthy Polish Holstein-Friesian cows kept under intensive rearing conditions. Of the 462 milk samples analyzed, 85.06% were contaminated with bacteria. The majority were coagulase-negative staphylococci (52.60%). Escherichia coli, Streptococcus dysgalactiae, and Streptococcus uberis, (Group 4) and Staphylococcus aureus and Streptococcus agalactiae (Group 5), collectively considered major pathogens, were identified in 16.66% of samples; their presence was associated with higher SCC levels. Additionally, contamination with Staph. aureus or Strep. agalactiae had prolonged clotting time, adversely affected curd and whey quality, with curd yield remaining unaltered. Bacterial contamination did not appear to significantly affect the yield of milk or its main components, namely protein, casein, lactose, fat, TS, solid nonfat, free fatty acid, or citric acid. Although pH, freezing point depression (FPD), and acidity also remained unaffected by bacterial contamination, they were significantly influenced by herd-year-season of calving and herd-year-time of sampling interaction effects. The results indicate that the presence of bacteria causing subclinical mastitis negatively influences milk processing potential. However, fixed linear regression indicated that the number of colony-forming units (cfu/mL) only had a significant influence on FPD and clotting time, and as such, the number of bacteria in a sample did not influence milk yield or quality during subclinical chronic mastitis.http://www.sciencedirect.com/science/article/pii/S0022030224012852dairy cattlemammary gland inflammationmilk qualitymilk technological parameters |
| spellingShingle | Magdalena Zalewska Paulina Brzozowska Magdalena Rzewuska Ewelina Kawecka-Grochocka Daria M. Urbańska Tomasz Sakowski Emilia Bagnicka The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis Journal of Dairy Science dairy cattle mammary gland inflammation milk quality milk technological parameters |
| title | The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| title_full | The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| title_fullStr | The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| title_full_unstemmed | The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| title_short | The quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| title_sort | quality and technological parameters of milk obtained from dairy cows with subclinical mastitis |
| topic | dairy cattle mammary gland inflammation milk quality milk technological parameters |
| url | http://www.sciencedirect.com/science/article/pii/S0022030224012852 |
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