High milk neutrophil chemiluminescence limits the severity of bovine coliform mastitis
- Author
- J MEHRZAD, Luc Duchateau (UGent) and Christian Burvenich (UGent)
- Organization
- Abstract
- Polymorphonuclear neutrophil (PMN) function changes during mastitis. To investigate the contribution of milk PMN to the severity of Escherichia coli (E. coli) mastitis, chemiluminescence ( CL) of blood and milk PMN and their efficiency to destroy coliform bacteria in the mammary gland were examined following the induction of E. coli mastitis in early lactating cows. To better assess and define the degree of mastitis severity, cows were classified as moderate and severe responders according to milk production loss in the non-infected quarters at post-infection hour (PIH) 48. There was an inverse relationship between pre-infection milk PMN CL and colony-forming units at PIH 6. In moderate cows, the pre-infection blood and milk PMN CL was similar to 2-fold higher than that of severe cows. The probability of severe response increased with decreasing pre-infection PMN CL. At the beginning of the infection blood and milk PMN CL was consistently higher, and milk PMN CL increased faster after infection in moderate cows. At PIH > 48 milk PMN CL in severe cows exceeded that of moderate cows. The somatic cell count (SCC) in moderate cows increased faster than colony-forming units, whereas in severe cows the results were reversed. The kinetics of CL activity for blood and milk PMN before and during the early phase of infection confirmed an impairment in PMN CL activity for severe responding cows. High pre-infection blood and milk PMN CL and the immediate increase of milk PMN CL and SCC after infection limited bacterial growth thereby facilitating the recovery of E. coli mastitis in moderate cows. Our study strengthens the idea that pre-existing milk PMN ( a static part of the udder's immune defense) functions as a "cellular antibiotic" before and during infection, and low milk PMN CL is a risk factor for bovine coliform mastitis.
- Keywords
- ESCHERICHIA-COLI, DAIRY-COWS, RESPIRATORY BURST ACTIVITY, BLOOD POLYMORPHONUCLEAR LEUKOCYTES, severity, neutrophil, mastitis, chemiluminescence, bovine, MYELOPEROXIDASE, STAPHYLOCOCCUS-AUREUS, MAMMARY-GLAND, PHAGOCYTOSIS, LUMINOL, CHEMI-LUMINESCENCE
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-301428
- MLA
- MEHRZAD, J., et al. “High Milk Neutrophil Chemiluminescence Limits the Severity of Bovine Coliform Mastitis.” VETERINARY RESEARCH, vol. 36, no. 1, E D P SCIENCES, 2005, pp. 101–16, doi:10.1051/vetres:2004055.
- APA
- MEHRZAD, J., Duchateau, L., & Burvenich, C. (2005). High milk neutrophil chemiluminescence limits the severity of bovine coliform mastitis. VETERINARY RESEARCH, 36(1), 101–116. https://doi.org/10.1051/vetres:2004055
- Chicago author-date
- MEHRZAD, J, Luc Duchateau, and Christian Burvenich. 2005. “High Milk Neutrophil Chemiluminescence Limits the Severity of Bovine Coliform Mastitis.” VETERINARY RESEARCH 36 (1): 101–16. https://doi.org/10.1051/vetres:2004055.
- Chicago author-date (all authors)
- MEHRZAD, J, Luc Duchateau, and Christian Burvenich. 2005. “High Milk Neutrophil Chemiluminescence Limits the Severity of Bovine Coliform Mastitis.” VETERINARY RESEARCH 36 (1): 101–116. doi:10.1051/vetres:2004055.
- Vancouver
- 1.MEHRZAD J, Duchateau L, Burvenich C. High milk neutrophil chemiluminescence limits the severity of bovine coliform mastitis. VETERINARY RESEARCH. 2005;36(1):101–16.
- IEEE
- [1]J. MEHRZAD, L. Duchateau, and C. Burvenich, “High milk neutrophil chemiluminescence limits the severity of bovine coliform mastitis,” VETERINARY RESEARCH, vol. 36, no. 1, pp. 101–116, 2005.
@article{301428, abstract = {{Polymorphonuclear neutrophil (PMN) function changes during mastitis. To investigate the contribution of milk PMN to the severity of Escherichia coli (E. coli) mastitis, chemiluminescence ( CL) of blood and milk PMN and their efficiency to destroy coliform bacteria in the mammary gland were examined following the induction of E. coli mastitis in early lactating cows. To better assess and define the degree of mastitis severity, cows were classified as moderate and severe responders according to milk production loss in the non-infected quarters at post-infection hour (PIH) 48. There was an inverse relationship between pre-infection milk PMN CL and colony-forming units at PIH 6. In moderate cows, the pre-infection blood and milk PMN CL was similar to 2-fold higher than that of severe cows. The probability of severe response increased with decreasing pre-infection PMN CL. At the beginning of the infection blood and milk PMN CL was consistently higher, and milk PMN CL increased faster after infection in moderate cows. At PIH > 48 milk PMN CL in severe cows exceeded that of moderate cows. The somatic cell count (SCC) in moderate cows increased faster than colony-forming units, whereas in severe cows the results were reversed. The kinetics of CL activity for blood and milk PMN before and during the early phase of infection confirmed an impairment in PMN CL activity for severe responding cows. High pre-infection blood and milk PMN CL and the immediate increase of milk PMN CL and SCC after infection limited bacterial growth thereby facilitating the recovery of E. coli mastitis in moderate cows. Our study strengthens the idea that pre-existing milk PMN ( a static part of the udder's immune defense) functions as a "cellular antibiotic" before and during infection, and low milk PMN CL is a risk factor for bovine coliform mastitis.}}, author = {{MEHRZAD, J and Duchateau, Luc and Burvenich, Christian}}, issn = {{0928-4249}}, journal = {{VETERINARY RESEARCH}}, keywords = {{ESCHERICHIA-COLI,DAIRY-COWS,RESPIRATORY BURST ACTIVITY,BLOOD POLYMORPHONUCLEAR LEUKOCYTES,severity,neutrophil,mastitis,chemiluminescence,bovine,MYELOPEROXIDASE,STAPHYLOCOCCUS-AUREUS,MAMMARY-GLAND,PHAGOCYTOSIS,LUMINOL,CHEMI-LUMINESCENCE}}, language = {{eng}}, number = {{1}}, pages = {{101--116}}, publisher = {{E D P SCIENCES}}, title = {{High milk neutrophil chemiluminescence limits the severity of bovine coliform mastitis}}, url = {{http://doi.org/10.1051/vetres:2004055}}, volume = {{36}}, year = {{2005}}, }
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